3 ms·
Yes, but people mistake a threshold response for a dose-dependent response. Maybe certain vitamins (and pseudo-vitamins like vitamin D3) have a threshold respo
by mikevm 13y ago
Yes, but people mistake a threshold response for a dose-dependent response.
Maybe certain vitamins (and pseudo-vitamins like vitamin D3) have a threshold response, that is, you only need a certain amount of it in your body for it to function properly, and adding any more will not make you any healthier (overdosing on vitamins can be fatal, so you can't just up the dosage).
- gwern 13y agoAnd also timing effects. To take the previously-mentioned iodine effect - while administering iodine in childhood or later will eliminate goiters due to iodine deficiency, as far as anyone can tell, post-natal iodine does little to nothing about the retardation or intelligence decreases caused by iodine deficiency, and even in pregnancy, the effect of supplementation seems to start decreasing from conception.