What Is Equivalence Principle?
The principle that evidence from clinical studies on a specific ingredient form, dosage, and population can only substantiate claims for products that are substantially similar to what was studied.
Why It Matters for Supplement Brands
One of the most common substantiation failures is using evidence from a clinical study on one ingredient form to support claims about a different form. For example, studies on curcumin with piperine don't necessarily substantiate claims for curcumin without piperine, even though both contain curcumin.
How It Works
To determine if a study is applicable to your product, evaluate these equivalence factors:
1. **Ingredient form**: Is the studied form the same as your product? (e.g., magnesium glycinate vs. magnesium oxide) 2. **Dosage**: Is the studied dose achievable with your serving size? 3. **Delivery method**: Was the study done with the same delivery form? (e.g., capsule vs. powder vs. liquid) 4. **Population**: Was the study population similar to your target consumer? (e.g., healthy adults vs. athletes vs. elderly) 5. **Duration**: Was the study long enough to observe the claimed effect? 6. **Supporting ingredients**: Were there bioavailability enhancers or other ingredients that affected the outcome?
If your product significantly differs from the studied product on any of these factors, the evidence may not be directly applicable.
Common Mistakes to Avoid
- ✗Using studies on one ingredient form to substantiate claims for a chemically different form
- ✗Citing studies that used doses much higher than what the product delivers per serving
- ✗Ignoring differences in study population (e.g., using athlete studies for general population claims)
Related Terms
See It in Action
Explore how this concept applies to real ingredient substantiation:
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