What if they’re combined in a single product? Does niacinamide reduce to niacin and become useless? I’m using something like this: Aqua(Water), Mandelic Acid(10%[?]), Lactobionic Acid, Niacinamide, Sodium Hyaluronate, Allantoin, Hydroxyethylcellulose, Polysorbate 20, Ethylhexylglycerin, Phenoxyethanol, Parfum(Fragrance), Butylphenyl Methylpropional, Hydroxycitronellal, Limonene, Linalool. I’m not flushing [maybe shizo].
Niacin isn’t useless, it just causes flushing for some people – that’s all.
The amount of niacinamide hydrolysis depends on the pH of the product, how long it’s been stored for, and at what temperature. It’s also possible that there isn’t much niacinamide in the product. Unless it states the amount on the package there’s no way to know, it could be 0.1% or 4%.
If you’re not experiencing flushing and enjoy using the product – then keep using it!
Hope that helps 🙂
