Autism pseudoscience is back in the news, and this time ice cream is the scapegoat. According to the animal rights group PETA, childhood autism may be
diminished with a dairy-free diet. While this is not a new campaign (it appears to have debuted in 2008), PETA recently made headlines as scientists and
others pointed out there is no established correlation between dairy and autism. In fact, any such correlation has been roundly debunked.
The Gluten-Free-and-Casein-Free-Diet (GFCF Diet for short) originated in the early 90s, and became popular among families living with autism after the 1998
Special Diets for Special Kids, a book about using dietary restrictions to treat developmental disabilities. It waas this book that made notorious “anti-vaccination” spokesperson Jenny McCarthy suspect inoculations caused her son’s developmental disability.
“What I got from the book was Evan was born with a weaker immune system; getting vaccinated wreaked havoc in his body, and mercury caused damage to the gut
(the gut being the home base for your immune system), which caused his inability to process certain proteins, and one could see the result of this damage
when he consumed wheat or dairy. Through removing wheat and dairy, this book proposed, some of these behaviors [Evan’s symptoms] could dissipate or
disappear.” – Jenny McCarthy, Louder than Words
PETA and others pushing a vegan diet to cure autism may not realize their position is inextricably linked to anti-vaccine activism, which has been
responsible for dramatic upsurges in deadly and preventable diseases in recent years. The CDC recently blamed anti-vaccination activism in part for the
highest measles rates in twenty years. Suggesting that dairy makes autism symptoms worse sends new parents down a rabbit hole of dangerous claims, from the relatively innocuous “go easy on the
gluten” to the quasi-homicidal “beware of vaccines.”
But all of that might be justifiable if dairy did, in fact, cause autism or even worsen it. It doesn’t. When pressed for evidence, PETA and others trot out a few anecdotes and the same couple of small-scale studies claiming to
show that autistic kids who went on a GFCF diet showed significantly reduced symptoms. However, these studies are incredibly old (one is almost two decades
old) and have major flaws. The first was only single-blinded. The parents who were responsible
for reporting whether their child improved knew whether the kid received treatment or not. And the second didn’t actually find a direct correlation between
milk intake and autism symptoms. When the studies were repeated and these flaws fixed, the positive effect went away completely or was so weak as to be a
non-starter. The American Academy of Pediatrics states that, at best, they
can’t recommend a GFCF diet to treat autism. And this should matter to PETA, since they seem to take the AAP as experts on PETA’s own website, noting that
the organization warns not to give cow’s milk to infants.
Since the recent press attention, social media has been aflutter with users asking PETA why they would still make this (at best) outdated autism claim.
Most who tweeted at the organization received a response like this:
The link leads to a site where PETA summarizes their evidence,
citing the two ancient studies but paying more attention to the stories parents have told: “The Internet contains numerous heart-wrenching stories from
parents of kids who had suffered the worst effects of autism for years before dairy foods were eliminated from their children’s diets.” Presumably, the
organization would not accept Internet comments as sources if the parents had said it was pork that cured their child’s autism.
In Louder than Words, McCarthy describes her heartbreaking tale of trying to understand her son’s disability, starting with seemingly endless
seizures at age two. After a harrowing hospital experience makes her lose faith in doctors, and after being forced to wait months for the proper behavioral
treatments, McCarthy turns to several spiritual healers, including two Mormon missionaries who predict her son will be better “in a year’s time,” and
submerses herself in internet research. “It was time to dig and get my doctorate from the University of Google,” she says. In the end, she subjects her child to chelation therapy, hyperbaric oxygen chambers, and a barrage of other alternative treatments.
McCarthy’s science education has clearly failed her (and by extension, her son). Likewise, the evidence provided on PETA’s site indicates that science
isn’t their strong suit either, however much good they do otherwise.
I stopped buying dairy products eleven years ago for animal welfare reasons. I also don’t buy meat or eggs. My diet is, for the most part, vegan. There are
plenty of good reasons people choose to avoid animal products, from animal protection to reduced risk of cardiovascular disease and obesity  to curbing climate change. But these bonus issues have
the benefit of being evidence-based. Dairy, on the other hand, doesn’t cause or aggravate autism, and claiming that it does indirectly supports the same
deadly pseudoscience that has created massive outbreaks of horrifying diseases. PETA would do well to retract their claim and apologize to the parents of
autistic children. And maybe send some coupons for soy ice cream.
While McCarthy advocates spreading out vaccinations in her book, she claims she was never actually anti-vaccine. “Everyone should ask
questions, but I’m certainly not against them,” she told Lara Spencer,
her op-ed in the Chicago Sun Times. This seems to contradict her previous position: “We
want to reduce the schedule and reduce the toxins. If you ask a parent of an autistic child if they want the measles or the autism, we will stand
in line for the f–king measles.”