Tylenol and Autism: The Science Behind the Headlines with Dr. William Parker
In this episode, I [Vanessa Lopez] sit down with William Parker, PhD, a scientist with decades of research in biochemistry, microbiology, and immunology. Best known for discovering the function of the human appendix and as a leading researcher studying acetaminophen (Tylenol) and its impact on neurodevelopment, William shares his insights on a topic that has recently garnered widespread media attention and public discussion, sparking conversation around acetaminophen and autism risk.
Steve, RE: "according to r/Autism_Parenting, I am evil for asking such a stupid question". I'm involved since the 1970s as a Specialized-Educator in workshops, residences, group-homes, hospital & my own extended family for folks labelled as 'intellectually-handicapped' including many many severely Autistic people. I've often asked parents & family about the Age-of-Autistic-Onset' for their babies & family members. In all cases, the high fevers, encephalitis & meningitis were following regular childhood scheduled vaccination. Tylenol or acetaminophen seems to be a facilitator or confounder adding to an already weakened immune system, just as the research you present clearly shows.
When 380 million people (colonies of US & Canada), are basically anti-'science' (French 'scier' = 'to cut or saw' as into analyze issues 'across multiple strikes or blade surfaces') in the most relevant survival factors or life-issues in their lives, we have to ask the more important 'system-process' questions of how people are coping as imperial subjects.
PROBLEM of INFORMATION JUNKIES: Straightforward inquiry on one of the many 1000s of issues people are facing, does not begin to ascertain the real process issues people are struggling with.
HOW DO WE LIVE?
Colonial period has settlers, living in detached nuclear suburban highway sprawl homes, separate & not collaborating with extended-family & neighbours. This 'exogenous' (Latin 'other-generated') Isolation has people, institutions, government, commerce & industry in the state of perpetual burnout with minds recoiling at any new information apart from severe propaganda & mind-control for all institutional, business & government interaction.
CULTURAL SELF-SUFFICIENCY All humanity's worldwide 'indigenous' (L. 'self-generating') ancestors in every nation, confederacy & continent organized the basic human cultural 'fractal' ('fraction, multiplier, building-block, where-the-part-contains-the-whole') around the ~100 (50-150) person Multihome-Dwelling-Complex (eg. Longhouse-apartment, Pueblo-townhouse & Kanata-village).
ALIGNING WITH WHO WE ARE NOW, WHERE WE LIVE & WORK
20% of Multihome-dwellers are extended families, living intentionally in proximity for social & economic collaboration. Extended families are actively taking care of handicapped, ill, injured, These extended-family & friend information hubs as intimate, intergenerational, female-male, interdisciplinary, Critical-mass, Economies-of-scale communities, have the lowest drugs, alcohol uptake per-capita as-well-as some of the highest social-interaction & business creation rates, because of natural complementary intergenerational mutual-aid & knowledge sharing. Extended families are the largest Community & health service provider everywhere, providing some 2 trillion dollars/year on Turtle-Island (N. America) /year of the most appropriate caring, sharing, food, shelter, clothing, warmth & health services typically based in plant-based medicines & life-style healing, albeit unrecognized by government, institutions & education.
Stipulalted facts for our son: ~104 fever within hours of 18 month childhood schedule inoculations. Inflammation treated with ice baths and round the clock acetaminophen for 3 days. Regression in milestones of developing infants. Measured indefinitely.
That wss 1994. Our son is now 34. Non verbal, cognitively impaired. Requires 24/7 care. Severe autism by Dx among other co-morbidities.
Yes. Mutation present. Due to geneome analysis cost and development, we did not get this done until he was beyond childhood. He is using B-vitamin therapy to avoid heart health issues later in life. No way he should have had the heavy metals in his multi dose vial vaccines injected into him given the suspected profile. Hg is the second most toxic substance known. Thimerosal is 50% Hg by weight. We are undergoing more extensive geonome work now as part of a research program.
I have MTHFR also. I take the methelated B vitamins and iv C. Have you look into iv C? It helps reduce homocysteine and gets rid of toxins. Pectasol C also helps rid the body of heavy metals. I take that daily. Plus avoiding all processed foods. Especially processed foods with folic acid. I eat a lot of green leafy vegetables.
“Curing the Incurable” by Dr. Thomas Levy is a great book to read about the incredible benefits of vitamin C.
Immediately. But we "assumed" that this was related to his lethargy from the fever and severe reaction. We never had any responses beyond that from the pediatrician we had seen. The we started searching for answers and decided to move away,... especially to seek better medical advice. That took years as he was tested for "hearing" problems, Dx os PDD-NOS, before we got to Cleveland Clinic and in a mulit dept. eval headed by Neurology, the "autism" Dx was attached to our son's condition. It was 1998 by then. It was clear to me that his life was ruined. Most people don't understand what that feels like until it happens to you. I have followed you for years now. You get it.
I do have a granddaughter with Autism who is 21. Her mother is convinced Tylenol had an impact since she had migraines during pregnancy and took a lot of of it.
Get gene testing done. There may be MTHFR mutations. There are B-vitamins issues which are also present that will impact heart health later. I know. Such is my own heart history.
"Acetaminophen use after MMR vaccination was significantly associated with autistic disorder when considering children 5 years of age or less (OR 6.11, 95% CI 1.42—26.3)..."
The odds ratio for (MMR vax + concurrent Tylenol) vs (MMR vax only) > 6:1 !
That is the 2008 Schultz et al. study I referred to earlier, and it is real evidence—but it is much better viewed as hypothesis-generating than as proof of causation.
The study was published in Autism and used an online parental survey of 83 children with autistic disorder and 80 controls. It reported that acetaminophen use after MMR vaccination was associated with autism in several analyses, including OR 6.11 for children age 5 or younger, OR 3.97 when restricted to children with developmental regression, and OR 8.23 among children with post-vaccination sequelae. Ibuprofen use was not associated with autism.
Those are large effect sizes, and the fact that the ibuprofen comparison was negative is interesting. It makes the paper harder to dismiss as merely “parents of autistic children remember giving more fever medicine of every kind.” But the confidence intervals were very wide—for example, 1.42 to 26.3 around the OR of 6.11—which tells you the estimate was statistically unstable because the sample was small.
The biggest weaknesses are the design. Exposure was reconstructed retrospectively from an online parent survey, after the autism diagnosis was known. That leaves substantial room for recall bias, differential reporting, and selection bias. Also, acetaminophen is often given because a child has fever, illness, or a reaction after vaccination, so confounding by indication is a serious concern: the underlying illness or inflammatory response could correlate with both acetaminophen use and subsequent developmental concerns. The authors did adjust for concurrent illness, but adjustment cannot necessarily eliminate that problem, especially in a small retrospective dataset.
The paper itself was appropriately cautious: its abstract calls it a “preliminary study” and concludes that acetaminophen use was associated with autistic disorder, not that it had been proven to cause autism.
So I would characterize it this way:
It is a legitimate positive signal, and arguably a fairly striking one, that deserved replication. It is not sufficient by itself to establish that acetaminophen triggers autism.
What would materially strengthen the case is an independent replication using prospectively collected exposure data—for example pharmacy records, contemporaneous medical records, or measured acetaminophen metabolites—and, ideally, specifically examining post-vaccination acetaminophen exposure and subsequent regression, which is closer to the Schultz hypothesis than the large pregnancy-exposure studies I mentioned earlier.
The 2008 Schultz et al. study was indeed a hypothesis-generating study. Since then other researchers, the most prominent among them being Dr. William Parker, have investigated the link between acetaminophen (aka paracetamol and APAP) and autism. The following paper by Parker et al lists 20 independent lines of evidence to establish the link:
The glutathione thread is the part I'd want to sit with, that 2020 meta-analysis pooling 87 studies into a consistent redox deficit is a striking signal on its own.
The open question it raises for me is directionality: since those glutathione levels are measured in kids already diagnosed, is the depletion upstream of the phenotype, downstream of it, or a shared marker of something else hitting redox balance? Have you come across any prospective data that catches glutathione status before onset rather than after? That's the piece that would settle which way the arrow points.
The scam is that the corrupt medical establish tries to pretend it is being super careful by telling parents the dangers of aspirin. Literally, everywhere you look, the lying word is out: "they" do not recommend aspirin.
So I asked grok: Has it been shown that tylenol is safer than aspirin? Answer: NO.
So, when I urged my loved one to NOT give her young child tylenol, the response was: What do I give her instead? With all the fear-mongering about aspirin, it would take real courage to give her young child aspirin. If it were me, I would most definitely give the young child baby aspirin. But, it was up to my loved one what to give her young child. Eventually, I think my loved one found something else to give her...but the carpet bombing of propaganda is tough to overcome.
For decades tylenol generic has been recommended to be given before or at the same time or right after vaccines. If the cause of autism is the vaccines, then there would be a strong correlation with generic tylenol but it would not be a causation factor.
The comment saying, "We didn't cause our kids autism by giving them pain meds and we all have enough to deal with emotionally without reading things that insinuate our actions could've cause harm to our children" SAYS IT ALL. You can't ask that question because it makes them feel GUILTY. Which is odd since how is it their fault since they didn't know, but, however the circuit is made in their head, the upshot is they don't want to feel any sense of blame. And since the official story is, "genetics," they must already feel like they're inferior and at fault. Then you come along and insinuate they deliberately gave their kid Tylenol! Deliberately!
I wish parents would stop feeling the need to relieve every discomfort their child has, they should also stop treating every discomfort they have. Fevers serve a primary immune function, every time you stop it the body has to work harder. Other than keeping the fever down to an unharmful degree, let the fever do its job. They will recover faster. Breaks my heart today… I wish I had know the dangers of Tylenol when my son was young. Increasing autism rates isn’t the only problem. It’s a total lie that Tylenol is for the most part harmless and safe.
A brief aside, if I may ... there is a reason Steven Crowder (unbeholden to anyone, but some may not like his style, and I get that) has a segment on his show titled "Reddit R*t*rds".
Once I completed reading this article, the first thing that came to mind was, “you can take a horse to water but you can’t make them drink.” Thank you Steve for your continued efforts to bring these studies and stats to light.
The MTHFR connection is real and should be considered with these studies. It would certainly quiet the "it's genetic" drum-beaters, as, yes, there is a genetic factor (MTHFR and/or other genetic blood or detox factors) when amplified by foreign heavy metals, chemicals, etc. Our daughter was "at risk" due to several factors, but they gave her multiple vaccines at birth and for months following - resulting in high fevers, lethargy, ER visits, suspected seizures, etc. Now she is lvl 4 autistic, developmentally and intellectually delatayed, with violent behaviors at age 18...she's spent the majority of her life in hospitals, psychiatric centers, and residential schools. I pray to God every day that those who cover up their crimes will see justice someday.
The really sad thing: there is a standard treatment for acetaminophen overdose. Something very complicated, tricky, and expensive. Its called NAC. Its method of action is to (effectively) replenish glutathione. If tylenol accelerates vaccine injury via glutathione depletion...
Everyone should read the book Tylenol and autism by William Parker, PhD
Tylenol and Autism: The Science Behind the Headlines with Dr. William Parker
In this episode, I [Vanessa Lopez] sit down with William Parker, PhD, a scientist with decades of research in biochemistry, microbiology, and immunology. Best known for discovering the function of the human appendix and as a leading researcher studying acetaminophen (Tylenol) and its impact on neurodevelopment, William shares his insights on a topic that has recently garnered widespread media attention and public discussion, sparking conversation around acetaminophen and autism risk.
https://intentionallywellpodcast.com/tylenol-and-autism-the-science-behind-the-headlines-with-dr-william-parker/
Steve, RE: "according to r/Autism_Parenting, I am evil for asking such a stupid question". I'm involved since the 1970s as a Specialized-Educator in workshops, residences, group-homes, hospital & my own extended family for folks labelled as 'intellectually-handicapped' including many many severely Autistic people. I've often asked parents & family about the Age-of-Autistic-Onset' for their babies & family members. In all cases, the high fevers, encephalitis & meningitis were following regular childhood scheduled vaccination. Tylenol or acetaminophen seems to be a facilitator or confounder adding to an already weakened immune system, just as the research you present clearly shows.
When 380 million people (colonies of US & Canada), are basically anti-'science' (French 'scier' = 'to cut or saw' as into analyze issues 'across multiple strikes or blade surfaces') in the most relevant survival factors or life-issues in their lives, we have to ask the more important 'system-process' questions of how people are coping as imperial subjects.
PROBLEM of INFORMATION JUNKIES: Straightforward inquiry on one of the many 1000s of issues people are facing, does not begin to ascertain the real process issues people are struggling with.
HOW DO WE LIVE?
Colonial period has settlers, living in detached nuclear suburban highway sprawl homes, separate & not collaborating with extended-family & neighbours. This 'exogenous' (Latin 'other-generated') Isolation has people, institutions, government, commerce & industry in the state of perpetual burnout with minds recoiling at any new information apart from severe propaganda & mind-control for all institutional, business & government interaction.
CULTURAL SELF-SUFFICIENCY All humanity's worldwide 'indigenous' (L. 'self-generating') ancestors in every nation, confederacy & continent organized the basic human cultural 'fractal' ('fraction, multiplier, building-block, where-the-part-contains-the-whole') around the ~100 (50-150) person Multihome-Dwelling-Complex (eg. Longhouse-apartment, Pueblo-townhouse & Kanata-village).
Today 70% of people live in Multihomes (apartment, townhouse & village) averaging 32 dwelling-units with ~100 people. In my work & volonteering with 1st Nations here & 'indigenous' people worldwide, I am constantly reminded how we are all originally indigenous & how the housing situations we are all in are the 'processes' we need to address. Https://sites.google.com/site/indigenecommunity/c-relational-economy/1-extending-our-welcome-participatory-multihome-cohousing
ALIGNING WITH WHO WE ARE NOW, WHERE WE LIVE & WORK
20% of Multihome-dwellers are extended families, living intentionally in proximity for social & economic collaboration. Extended families are actively taking care of handicapped, ill, injured, These extended-family & friend information hubs as intimate, intergenerational, female-male, interdisciplinary, Critical-mass, Economies-of-scale communities, have the lowest drugs, alcohol uptake per-capita as-well-as some of the highest social-interaction & business creation rates, because of natural complementary intergenerational mutual-aid & knowledge sharing. Extended families are the largest Community & health service provider everywhere, providing some 2 trillion dollars/year on Turtle-Island (N. America) /year of the most appropriate caring, sharing, food, shelter, clothing, warmth & health services typically based in plant-based medicines & life-style healing, albeit unrecognized by government, institutions & education.
REINDIGENIZING
DO-WE-KNOW-WHO-WE-ARE-? Http://sites.google.com/site/indigenecommunity/d-participatory-structure/9-do-we-know-who-we-are MODEL of web-based Community-Circular-Economy software:
A) CATALOGUE intake form for individual & business Talents, Goods, Services, Resources & Dreams (Sorry, Google-form needs redoing). Https://sites.google.com/site/indigenecommunity/a-home/7-membership Sample form: https://docs.google.com/document/d/1HmGTclsgAk4qX7z2-ctLq00XFPpmtDDY
B) MAP local proximal collaborative relations for complementary economic concertation. Baseline mapping of 105 Mohawk, Wendat & Algonquian Placenames in the Tiohtiake (greater Montreal archipelago) region https://sites.google.com/site/indigenecommunity/a-home/5-tiohtiake-mohawk-placenames
C) ACCOUNT for collective contributions, buying, selling & co-investment. Https://sites.google.com/site/indigenecommunity/c-relational-economy D) COMMUNICATE formally through COUNCIL PROCESS for creating Constructive Agreements & for Conflict Resolution. Https://sites.google.com/site/indigenecommunity/d-participatory-structure/1-both-sides-now-equal-time-recorded-dialogues
Stipulalted facts for our son: ~104 fever within hours of 18 month childhood schedule inoculations. Inflammation treated with ice baths and round the clock acetaminophen for 3 days. Regression in milestones of developing infants. Measured indefinitely.
That wss 1994. Our son is now 34. Non verbal, cognitively impaired. Requires 24/7 care. Severe autism by Dx among other co-morbidities.
Who you gonna' believe, me or your lyin' eyes?
I've been watching this for 35 years. It took COVID to start waking the masses.
Has your son been tested for MTHFR? People with MTHFR already have lower glutathione levels so Tylenol would be devastating after a vaccine.
Yes. Mutation present. Due to geneome analysis cost and development, we did not get this done until he was beyond childhood. He is using B-vitamin therapy to avoid heart health issues later in life. No way he should have had the heavy metals in his multi dose vial vaccines injected into him given the suspected profile. Hg is the second most toxic substance known. Thimerosal is 50% Hg by weight. We are undergoing more extensive geonome work now as part of a research program.
I have MTHFR also. I take the methelated B vitamins and iv C. Have you look into iv C? It helps reduce homocysteine and gets rid of toxins. Pectasol C also helps rid the body of heavy metals. I take that daily. Plus avoiding all processed foods. Especially processed foods with folic acid. I eat a lot of green leafy vegetables.
“Curing the Incurable” by Dr. Thomas Levy is a great book to read about the incredible benefits of vitamin C.
Thanks. We are awaiting latest gene analysis for both my son and myself ( my wife as well)
How soon after Tylenol did u see start?
Immediately. But we "assumed" that this was related to his lethargy from the fever and severe reaction. We never had any responses beyond that from the pediatrician we had seen. The we started searching for answers and decided to move away,... especially to seek better medical advice. That took years as he was tested for "hearing" problems, Dx os PDD-NOS, before we got to Cleveland Clinic and in a mulit dept. eval headed by Neurology, the "autism" Dx was attached to our son's condition. It was 1998 by then. It was clear to me that his life was ruined. Most people don't understand what that feels like until it happens to you. I have followed you for years now. You get it.
I do have a granddaughter with Autism who is 21. Her mother is convinced Tylenol had an impact since she had migraines during pregnancy and took a lot of of it.
Get gene testing done. There may be MTHFR mutations. There are B-vitamins issues which are also present that will impact heart health later. I know. Such is my own heart history.
Here is probably the first paper (2008) that established a connection between Tylenol (acetaminophen) and autism.
https://journals.sagepub.com/doi/10.1177/1362361307089518
"Acetaminophen use after MMR vaccination was significantly associated with autistic disorder when considering children 5 years of age or less (OR 6.11, 95% CI 1.42—26.3)..."
The odds ratio for (MMR vax + concurrent Tylenol) vs (MMR vax only) > 6:1 !
That is the 2008 Schultz et al. study I referred to earlier, and it is real evidence—but it is much better viewed as hypothesis-generating than as proof of causation.
The study was published in Autism and used an online parental survey of 83 children with autistic disorder and 80 controls. It reported that acetaminophen use after MMR vaccination was associated with autism in several analyses, including OR 6.11 for children age 5 or younger, OR 3.97 when restricted to children with developmental regression, and OR 8.23 among children with post-vaccination sequelae. Ibuprofen use was not associated with autism.
Those are large effect sizes, and the fact that the ibuprofen comparison was negative is interesting. It makes the paper harder to dismiss as merely “parents of autistic children remember giving more fever medicine of every kind.” But the confidence intervals were very wide—for example, 1.42 to 26.3 around the OR of 6.11—which tells you the estimate was statistically unstable because the sample was small.
The biggest weaknesses are the design. Exposure was reconstructed retrospectively from an online parent survey, after the autism diagnosis was known. That leaves substantial room for recall bias, differential reporting, and selection bias. Also, acetaminophen is often given because a child has fever, illness, or a reaction after vaccination, so confounding by indication is a serious concern: the underlying illness or inflammatory response could correlate with both acetaminophen use and subsequent developmental concerns. The authors did adjust for concurrent illness, but adjustment cannot necessarily eliminate that problem, especially in a small retrospective dataset.
The paper itself was appropriately cautious: its abstract calls it a “preliminary study” and concludes that acetaminophen use was associated with autistic disorder, not that it had been proven to cause autism.
So I would characterize it this way:
It is a legitimate positive signal, and arguably a fairly striking one, that deserved replication. It is not sufficient by itself to establish that acetaminophen triggers autism.
What would materially strengthen the case is an independent replication using prospectively collected exposure data—for example pharmacy records, contemporaneous medical records, or measured acetaminophen metabolites—and, ideally, specifically examining post-vaccination acetaminophen exposure and subsequent regression, which is closer to the Schultz hypothesis than the large pregnancy-exposure studies I mentioned earlier.
The 2008 Schultz et al. study was indeed a hypothesis-generating study. Since then other researchers, the most prominent among them being Dr. William Parker, have investigated the link between acetaminophen (aka paracetamol and APAP) and autism. The following paper by Parker et al lists 20 independent lines of evidence to establish the link:
https://pmc.ncbi.nlm.nih.gov/articles/PMC10814214/
Parker has also written a book titled: "Tylenol and Autism."
And what do doctors routinely prescribe for "Adverse Vaxxine Reaction"?
Popsicles and Tylenol!
A case for non-vax interventions.
The glutathione thread is the part I'd want to sit with, that 2020 meta-analysis pooling 87 studies into a consistent redox deficit is a striking signal on its own.
The open question it raises for me is directionality: since those glutathione levels are measured in kids already diagnosed, is the depletion upstream of the phenotype, downstream of it, or a shared marker of something else hitting redox balance? Have you come across any prospective data that catches glutathione status before onset rather than after? That's the piece that would settle which way the arrow points.
The scam is that the corrupt medical establish tries to pretend it is being super careful by telling parents the dangers of aspirin. Literally, everywhere you look, the lying word is out: "they" do not recommend aspirin.
So I asked grok: Has it been shown that tylenol is safer than aspirin? Answer: NO.
So, when I urged my loved one to NOT give her young child tylenol, the response was: What do I give her instead? With all the fear-mongering about aspirin, it would take real courage to give her young child aspirin. If it were me, I would most definitely give the young child baby aspirin. But, it was up to my loved one what to give her young child. Eventually, I think my loved one found something else to give her...but the carpet bombing of propaganda is tough to overcome.
For decades tylenol generic has been recommended to be given before or at the same time or right after vaccines. If the cause of autism is the vaccines, then there would be a strong correlation with generic tylenol but it would not be a causation factor.
Breathtaking. It truly is a mass formation psychosis with these people!
IMPORTANT too: Tylenol (acetaminophen) triggers autoimmune attacks on Vitamin B9’s FOLR1 receptors: https://pmc.ncbi.nlm.nih.gov/articles/PMC10915458/
FUNCTIONAL vitamin B9 deficiency in autism is real and Tylenol is one of the culprits.
Covered it here on D2D: https://dutytodissent.substack.com/p/white-house-autism-announcement-what?r=wnyan&utm_medium=ios
The comment saying, "We didn't cause our kids autism by giving them pain meds and we all have enough to deal with emotionally without reading things that insinuate our actions could've cause harm to our children" SAYS IT ALL. You can't ask that question because it makes them feel GUILTY. Which is odd since how is it their fault since they didn't know, but, however the circuit is made in their head, the upshot is they don't want to feel any sense of blame. And since the official story is, "genetics," they must already feel like they're inferior and at fault. Then you come along and insinuate they deliberately gave their kid Tylenol! Deliberately!
How COULD you, Steve? How COULD YOU??
I wish parents would stop feeling the need to relieve every discomfort their child has, they should also stop treating every discomfort they have. Fevers serve a primary immune function, every time you stop it the body has to work harder. Other than keeping the fever down to an unharmful degree, let the fever do its job. They will recover faster. Breaks my heart today… I wish I had know the dangers of Tylenol when my son was young. Increasing autism rates isn’t the only problem. It’s a total lie that Tylenol is for the most part harmless and safe.
A brief aside, if I may ... there is a reason Steven Crowder (unbeholden to anyone, but some may not like his style, and I get that) has a segment on his show titled "Reddit R*t*rds".
Once I completed reading this article, the first thing that came to mind was, “you can take a horse to water but you can’t make them drink.” Thank you Steve for your continued efforts to bring these studies and stats to light.
The MTHFR connection is real and should be considered with these studies. It would certainly quiet the "it's genetic" drum-beaters, as, yes, there is a genetic factor (MTHFR and/or other genetic blood or detox factors) when amplified by foreign heavy metals, chemicals, etc. Our daughter was "at risk" due to several factors, but they gave her multiple vaccines at birth and for months following - resulting in high fevers, lethargy, ER visits, suspected seizures, etc. Now she is lvl 4 autistic, developmentally and intellectually delatayed, with violent behaviors at age 18...she's spent the majority of her life in hospitals, psychiatric centers, and residential schools. I pray to God every day that those who cover up their crimes will see justice someday.
Steve, MTHFR is a piece of the puzzle because those that deal with this have impaired detox pathways and lower glutathione levels to begin with.
Also, doctors know that Tylenol depletes glutathione because the antidote to Tylenol overdose is IV NAC. NAC produces glutathione.
The really sad thing: there is a standard treatment for acetaminophen overdose. Something very complicated, tricky, and expensive. Its called NAC. Its method of action is to (effectively) replenish glutathione. If tylenol accelerates vaccine injury via glutathione depletion...