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That depends on your lab results
NIOD Copper Amino Isolate Serum 3 1:1 (CAIS3) Best copper isolate serum Photo by Innerbody Research Pros Star ingredients are GHK-Cu and GHK Product pH is mildly acidic (5.7-6.7) Vegan and cruelty-free Free of alcohol, oil, silicone, and gluten Available in two sizes: 15mL and 30mL Packaged very nicely Free shipping on orders over $25 Products can be returned up to 365 days after purchase Cons No subscription option (or discount) available Full potential benefits may require additional products from Core Regimen line Very strong, unpleasant smell On the expensive side compared to our other picks Though it may not be as well-known as The Ordinary, NIOD (Non-Invasive Options in Dermal Science) has the same parent company, DECIEM
Its entirely up to you
If you take one that contains levels of vitamin B12 that are well above the RDA, you may have side effects such as gastrointestinal discomfort, says Anderson-Haynes
Alghamdi, H
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