While niacinamide is known for its skin-brightening properties, it is not a direct treatment for dark underarms.
Dark underarms, also known as axillary hyperpigmentation, are often caused by factors like friction from clothing, shaving, hormonal changes, or even genetics.
While niacinamide can help with overall skin tone and texture, it doesn't specifically target the pigmentation issues that lead to dark underarms.
If you're concerned about dark underarms, it's best to consult a dermatologist for personalized advice and treatment options.
