Vitamin A quotes from Ray's favorite physiology book
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@Peatful said in Vitamin A quotes from Ray's favorite physiology book:
@Mauritio said in Vitamin A quotes from Ray's favorite physiology book:
@Mauritio said in Vitamin A quotes from Ray's favorite physiology book:
“A relatively recent Iranian study by Farhangi et al. observed that, in healthy premenopausal obese and non-obese women, 4 months of VAS was able to reduce TSH and increase T3 levels
@Peatful this is the study that you referenced above, which shows a beneficial effect of 25 000 IU of Retinyl palmitate on thyroid markers, meaning increased T3 and lowered TSH.
Its interesting that the rat study found negative effects and the human study postive effects at a similar dosage.
But since human studies are higher up in the evidence pyramide, I tend to interpret this as Vitamin A beeing good for thyroid in reasonable dosages.The effect was especially pronounced in nonobese individuals where T3 increased by more than 60%!
Oh yes, I meant @Peatly
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@Mauritio There are huge variations in results for vitamin A studies. I think Dr Peat’s recommendation, which is to be cautious if hypothyroid, seems reasonable. I would like to see that Iranian study replicated elsewhere – especially in regions where Billy Goat is blocking the sun.
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@Peatly said in Vitamin A quotes from Ray's favorite physiology book:
@Mauritio There are huge variations in results for vitamin A studies. I think Dr Peat’s recommendation, which is to be cautious if hypothyroid, seems reasonable. I would like to see that Iranian study replicated elsewhere – especially in regions where Billy Goat is blocking the sun.
Yes, I agree.
What does it have to do with the sun/ Vitamin D? -
@Mauritio said in Vitamin A quotes from Ray's favorite physiology book:
@Peatly said in Vitamin A quotes from Ray's favorite physiology book:
@Mauritio There are huge variations in results for vitamin A studies. I think Dr Peat’s recommendation, which is to be cautious if hypothyroid, seems reasonable. I would like to see that Iranian study replicated elsewhere – especially in regions where Billy Goat is blocking the sun.
Yes, I agree.
What does it have to do with the sun/ Vitamin D?I was under the impression that being exposed to sunlight, for extended periods, increases your vitamin A requirements. I was thinking that if the sun is being blocked this might lower need?
Dr Peat talking about light exposure and vitamin A
This is the dentist Dr Peat mentions in that clip
Emanuel Cheraskin, M.D., D.M.D., late Professor of Oral Medicine at the University of Birmingham, AL.