What time of day should you take niacinamide?

Niacinamide can be taken at any time of day, but it's commonly applied in the morning and/or evening as part of a skincare routine. Applying it in the morning can help protect the skin from environmental stressors, while nighttime use allows it to work on skin repair and hydration overnight. Ultimately, the best time depends on your personal preference and how it fits into your routine.