Ingredient pairing
Can you mix THD Ascorbate and Vitamin B3?
Fine togetherThey're fine together.
Good news, and a myth worth retiring: niacinamide and vitamin C are fine together. The old warning that they cancel out came from lab conditions that do not reflect how modern products are made.
Routine: You can use these together, morning or night.
THD AscorbateSolid and proven
Skip if: very sensitive
Vitamin B3Worth paying for
Skip if: very sensitive in high
General guidance, not medical advice. When in doubt, introduce one product at a time.