Free Tool

Supplement Stack Screening

Enter the ingredients you actually take each day. Review an audit progress score, documented interactions, and duplicate ingredients. The score is not a safety conclusion.

Have a label photo? Snap or upload it instead

Use the amount you actually take each day. Blank or 0 stays unscored.

Choose the label unit; it is never guessed.

What This Stack Screening Answers

The task it completes
A whole-stack screening: with each ingredient entered at its actual daily serving and label unit, it lists documented pair interactions, cross-product duplicates, and combined amounts against verified references.
Data to prepare
Prepare each ingredient and its unit. Convert the label amount per serving using your actual servings per day; enter that daily amount, not the number of tablets.
Scope boundary
A review checklist built from the current rule set — not a personal safety conclusion. A dose left blank stays unscored instead of being filled with a reference value.

Synthetic label calculation example

A step-by-step example built from a synthetic label shows how overlap and combined daily amounts are calculated. It contains no real product or personal data.

See the synthetic label calculation example

Related free checks

What Is a Supplement Stack Safety Checker?

A supplement stack checker reviews the products you enter across three dimensions: (1) interactions documented in the current rule set, (2) repeated ingredients across products, and (3) whether combined label amounts reach a regional reference the project has verified. The result is a review list, not a personal safety conclusion.

Why Check Your Supplement Stack

When combining multiple supplements, three common concerns are worth checking:

  • Absorption Competition — Minerals such as calcium, iron, and zinc may affect one another's absorption depending on the dose and combination
  • Ingredient Overlap — The same nutrient may appear on multivitamin, fortified-product, and standalone-supplement labels.
  • Evidence Boundary — A regional reference appears only when the project has verified it; no rule match does not establish safety.

How Do I Compare a Multivitamin, Pre-Workout, and Protein Powder?

  1. Enter each product label separately instead of entering only the product category.
  2. Use the actual daily serving to review repeated ingredients and combined label amounts.
  3. Review any tool flag against the original label and cited source; take medicine or health-condition questions to a qualified professional.

Who Should Check Their Stack

  • Anyone taking 3 or more supplements daily
  • People combining a multivitamin with standalone supplements
  • Anyone adjusting their supplement regimen
  • People with medicines, pregnancy, or chronic conditions who need a complete list for professional review
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Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.