In plain words
A tolerable upper intake level is the highest daily amount of a nutrient that is unlikely to cause harm in almost all people. A scientific body sets it, not a product label. Going above it does not mean harm will happen, but the risk is less well understood. The level matters most with supplements, , and some animal foods rich in certain vitamins. Vitamin A is an example in pregnancy, because too much preformed vitamin A can harm a developing baby. Some national health services advise avoiding certain products altogether. Your prenatal care team can tell you what is in what you take.
The deeper version
The tolerable upper intake level is the highest average daily intake likely to pose no risk of adverse effects in nearly all individuals in a life-stage group, set by the Institute of Medicine, now the National Academies, in the . Preformed vitamin A is at high intake, and its UL applies in pregnancy, which makes combined supplement and liver intake relevant. Some national agencies advise stricter cautions for liver and cod liver oil. ULs rest on limited human data, often extrapolated from animal studies, so they are conservative boundaries rather than toxicity thresholds.
Where it comes up
- Supplements beyond the prenatal: what's worth asking aboutPregnancy: Eating
- Vitamin DPregnancy: Eating
- Korean samchilil and miyeok-gukNourishment and Traditions
What mothers here say about tolerable upper intake level
No one has posted under this term yet.
Sources
- National Academies of Sciences, Engineering, and Medicine — Dietary Reference Intakes: vitamin A, 2001
- NHS — Vitamins and minerals in pregnancy: advice on liver and cod liver oil