Ingredient pairing
Can you mix GHK-Cu and Vitamin B3?
Fine togetherThey're fine together.
These two actually work well together, and are often formulated side by side.
Routine: You can use these together, morning or night.
GHK-CuSolid and proven
Vitamin B3Worth paying for
Skip if: very sensitive in high
General guidance, not medical advice. When in doubt, introduce one product at a time.