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Sci (New York NY) (2016) 351(6279):13338

Before beginning work, verify product identity, purity, fill amount, lot number, and storage requirements against the COA and product label

Tier 1: Meets All Four Criteria Products in this tier state a minimum 1% Copper Tripeptide-1 concentration or provide a COA on request confirming HPLC purity above 95%, use an opaque pump or dropper bottle, and have a serum vehicle with stated or measurable pH in the 5.5 to 7 range

Ashwagandha Medication Interactions to Be Careful About If you are on any medication, you should talk to your clinician before starting any herbal supplement