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News Release February 03, 2017 ConsumerLab.com Shows How Much Choline is Really in Supplements -- ConsumerLab.com Tests Phosphatidylcholine (From Soy Lecithin), Citicoline, Alpha-GPC and Other Choline-Containing Supplements, Identifying Top Picks White Plains, New York, February 3, 2017 Choline is an essential nutrient important for liver and brain function

Storage, Formulation Vehicle, and the Blue Tint Copper peptides are more stable than many biological peptides, but proper storage of a GHK-Cu topical serum still matters for maintaining potency

Concentration of pure compounds in Standard stocks were validated by UV-VIS spectroscopy as described elsewhere

Nature 474, 307317