A concentration of 5% niacinamide has been shown to be effective in reducing hyperpigmentation in various studies. However, higher concentrations may be more effective, but also increase the risk of side effects.
Look for products with a concentration of 3-5% niacinamide for optimal results. Some popular products include The Ordinary Niacinamide 10% + Zinc 1% and Paula's Choice 10% Niacinamide Booster.
A study published in the Journal of Clinical and Aesthetic Dermatology found that a 5% niacinamide cream was effective in reducing hyperpigmentation in patients with melasma.
Niacinamide has been shown to be effective in reducing hyperpigmentation when used in concentrations of 3-5%. It works by inhibiting the transfer of melanin to skin cells, resulting in a more even skin tone.
A systematic review of 17 studies on the use of niacinamide for hyperpigmentation found that concentrations ranging from 3-10% were effective in reducing hyperpigmentation.
To get the best results from niacinamide for hyperpigmentation, use a product with a concentration of 5% or higher and apply it consistently for at least 8 weeks.
A study published in the Journal of Clinical Medicine found that a combination of 5% niacinamide and 0.5% retinol was more effective in reducing hyperpigmentation than niacinamide alone.
When choosing a niacinamide serum for hyperpigmentation, look for a product with a stable and effective concentration of 3-5% niacinamide. Also, consider the pH level of the product, as niacinamide is most effective at a pH between 5.5 and 6.5.