S
shucknchuck
Guest
This is a Simple explanation, tested on myself.
For over a month, I restricted the high vitamin A foods dairy and liver, while continuing to supplement idealabs' synthetic vitamin A supplement, Retinil - which created no reaction (after testing with/without). If I had so much as a small glass of milk, I would feel extremely tired/depressed/irritable, with bad digestion, etc. I would also feel this if eating potato in any form, which curiously has no vitamin A. I also react the same way to any serotonergic food, mostly nightshades.
For about a month of low vitamin A foods, I was faithfully microdosing t3 in efforts to improve my thyroid. When I reintroduced dairy and liver in significant amounts, I then had none of the prior symptoms for dairy, and the symptoms, while persisting extremely mildly, are so little for liver as to be almost gone.
Methionine happens to be high in typical high vitamin A foods.
Methionine is a major factor for Ray Peat in metabolic health. Methionine raises serotonin. Serotonin is implicated in hypothyroidism and gut issues. Lowering methionine has been shown to increase metabolism. Perhaps there is a problem where one would want an adequate metabolic rate to handle dietary methionine.
I see no sense in the anti-vitamin A advocacy, given it has been consumed in far higher quantities by people living into their 90s/100s with no discernable metabolic issues, and its well studied necessity in genetics, androgen production, anti-estrogen activity, and anti-cortisol activity. So, maybe don't consume 50k IUs of vit A from a supplement, and give yourself vit E deficiency and nervous system problems, but return to balance?!
For the record, I have increased my supplementation up to 40,000 IU's + increased Vit E for these summer months, and do way better in summer heat/sun in Texas.
For over a month, I restricted the high vitamin A foods dairy and liver, while continuing to supplement idealabs' synthetic vitamin A supplement, Retinil - which created no reaction (after testing with/without). If I had so much as a small glass of milk, I would feel extremely tired/depressed/irritable, with bad digestion, etc. I would also feel this if eating potato in any form, which curiously has no vitamin A. I also react the same way to any serotonergic food, mostly nightshades.
For about a month of low vitamin A foods, I was faithfully microdosing t3 in efforts to improve my thyroid. When I reintroduced dairy and liver in significant amounts, I then had none of the prior symptoms for dairy, and the symptoms, while persisting extremely mildly, are so little for liver as to be almost gone.
Methionine happens to be high in typical high vitamin A foods.
Methionine is a major factor for Ray Peat in metabolic health. Methionine raises serotonin. Serotonin is implicated in hypothyroidism and gut issues. Lowering methionine has been shown to increase metabolism. Perhaps there is a problem where one would want an adequate metabolic rate to handle dietary methionine.
I see no sense in the anti-vitamin A advocacy, given it has been consumed in far higher quantities by people living into their 90s/100s with no discernable metabolic issues, and its well studied necessity in genetics, androgen production, anti-estrogen activity, and anti-cortisol activity. So, maybe don't consume 50k IUs of vit A from a supplement, and give yourself vit E deficiency and nervous system problems, but return to balance?!
For the record, I have increased my supplementation up to 40,000 IU's + increased Vit E for these summer months, and do way better in summer heat/sun in Texas.