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Red Flags to Avoid No COA available, or a COA that won't load / is image-only with no lab name Batch numbers that don't match between COA and vial Purity claimed with no supporting HPLC chromatogram Marketing that presents the retracted "seven orders of magnitude more potent than BDNF" figure as settled fact (see the evidence section below) Human dosing instructions or therapeutic claims on the listing a tell that the seller is ignoring RUO rules Vendor copy citing a "12.8-day half-life" as established this figure appears only in vendor marketing, with no verifiable peer-reviewed source A clean COA verifies that the powder is what the label says

These amino acids function as building blocks for proteins

Products priced at 30 to 50 dollars per month are not the same compound or the same pharmaceutical grade

Nature 203 , 10681069 (1964)

Injectable effects are typically local: redness, mild swelling, or a slight blue-tinted bruise from the copper complex