As you are referencing, folate is essentially for normal development and neurogenesis. That said, they routinely prescribe prenatal vitamins with folate, and this spike in autism seems to have occurred after the emphasis on getting enough folate during pregnancy. I’m not saying it can’t be playing a role, but I wonder why now?
People don’t eat as well, nor do they get as much exercise as they used to.
Supplements are not the same as nutrition from real food itself.
Also, stress levels in people’s lives are through the roof. It’s been known for a long time that a high stress pregnancy = a stressed out baby.
All that said, Tylenol is some dangerous stuff and I wonder how it was ever allowed on the market with the knowledge of the risk it poses just to the liver.
And who knows what else the pharm industry hid from us about the true side effects they found in it in their studies?
The best source of folate is eating well. Naturally occurring vitamins are far better for you than synthetically produced ones.
What a novel concept.
Foods high in folate:
https://www.healthline.com/nutrition/foods-high-in-folate-folic-acid
Legumes
Asparagus
Eggs
Leafy greens
Beets
Citrus
Brussel sprouts
Broccoli
Nuts and seeds
Beef liver
Wheat germ
Papaya
Bananas
Avocado
Fortified grains (Iffy in my book as they use synthetic vitamins)