Discussions tagged with 'zinc-pca' Abdullah How much zinc PCA gives us 1g zinc like the ordinary Niacinamide 10% + Zinc 1% Abdullah replied 3 years, 5 months ago 2 Members · 2 Replies Formulating rikandry Can Niacinamide, Lactic acid, ZInc PCA and Hydrolyzed Collagen become one product rikandry replied 3 years, 10 months ago 3 Members · 3 Replies Formulating Viewing 1 - 2 of 2 discussions