Sources Policy
How NutraVitalityLab prioritizes scientific sources, seller materials, labels, marketplace information and evidence limitations.
Scientific and Health Evidence
Where relevant, we prioritize systematic reviews, meta-analyses, randomized human trials, peer-reviewed research and authoritative government or academic health sources.
Product Information
Primary product materials can be appropriate for current formula, serving directions, package information, price and refund policies. They establish what a seller states; they do not independently prove effectiveness.
Ingredient Evidence
We consider ingredient identity, plant part, preparation, standardization, dose, route and population. A study on one preparation may have limited relevance to another.
Conflicting Sources
When credible sources conflict, we may prioritize the more authoritative/current source, disclose the conflict, seek more evidence or leave the issue unresolved.
Dynamic Information
Prices, discounts, retailer availability, shipping and refund terms can change. We aim to date-check important commercial information and encourage readers to verify final checkout details.