Research
Micronutrients & recovery
Some dietary supplements contain nutrients at or above the Upper Intake Levels (UL), posing a risk of excessive intake, especially when multiple supplements are used.
Check your supplement labels. Some contain nutrients at or above the Upper Intake Levels. Taking multiple supplements can increase the risk of exceeding safe limits.
ModerateQualifiesMEDIUM confidence
However, some supplements list nutrients at levels at or above the Upper Intake Levels (UL) set by the National Academy of Sciences (21).
Why this rating
Based on label analysis, not clinical outcomes.
Source
Dietary Supplement Use by US Adults: Data from the National Health and Nutrition Examination Survey, 1999-2000
Kathy Radimer · American Journal of Epidemiology · 2004
DOI 10.1093/aje/kwh207
cross_sectional · n=4862Cited 822×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Dietary supplement use, particularly multivitamins and calcium-containing antacids, contributes significantly to total nutrient intake in US adults and must be accounted for in epidemiological studies to avoid confounding.Good
- Calcium-containing antacids are a significant source of supplemental calcium for many adults, often exceeding the intake from dedicated calcium supplements.Good
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