Micronutrient Upper Limits Checker (UL Tally)

Estimate percent of tolerable upper intake levels

Choose your age group and sex, enter the label amounts, and see percent of the tolerable upper intake levels (ULs). Education only—ask your clinician/pharmacist for personal advice.

Pick age & sex, add label amounts, then tap Tally my ULs.

How this UL checker works, what percent means, and safe spacing

Quick summary

This Micronutrient Upper Limits Checker (UL Tally) converts your supplement amounts into percent of the tolerable upper intake level (UL) for your age group and sex. ULs are the highest average daily intake unlikely to pose risk for most people. They are not goals. At or below 100% suggests you’re within the ceiling; above 100% flags potential excess and a need to review labels, overlap, and timing with a professional.

What to enter

Select your age band and sex, then enter the daily amounts shown on your labels. Vitamin A and D often use IU; the tool converts to mcg (A as RAE; D as cholecalciferol equivalents). Enter iron, zinc, vitamin B6, niacin, vitamin C, and selenium in mg or mcg as shown. If you use more than one product, add them together and enter the total per day.

Reading your results

The result card summarizes your highest percent with simple KPIs and badges listing any nutrients near or over the UL. The table shows your amount, the UL for you, and the percent. Green is typically within limits, amber is near the ceiling, and red is over.

Spacing & stacking tips

Running close to a limit? Avoid duplicate products (e.g., a multi plus a high-dose zinc). Splitting doses may help tolerance but doesn’t change your daily percent—only the total amount does. If you’re over the UL, consider lower-dose versions or removing overlap after checking with your clinician or pharmacist.

Limits & caveats

ULs assume generally healthy individuals. Pregnancy, lactation, health conditions, interactions, and certain forms (e.g., retinol vs carotenoids) can change risk. This tool isn’t medical advice—use it to spot stacking and prepare specific questions for your care team.

References

Educational use only. Follow medical advice for your situation.

Micronutrient UL checker FAQs
Does percent of UL include food?

ULs usually apply to total daily intake (supplements + food). This tool tallies what you enter; consider diet and fortified foods too.

Why convert IU to mcg for vitamins A and D?

Labels vary. Converting to mcg standardizes the comparison against the UL.

Is over 100% always dangerous?

It signals potential risk and deserves a review with your clinician, especially if sustained. Individual factors matter.