Nicotinamide, also known as niacinamide, is a form of vitamin B3 that has a variety of health benefits. It is commonly used as a dietary supplement and is found in many skincare products due to its ability to improve skin health.
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The different concentrations of nicotinamide have varying effects:
1.2%-5% – Skin whitening effect 2.2% – Moisturizing effect 3.2% – Oil control effect 4.4% – Acne treatment effect 5.5% – Anti-aging effect
Low concentration nicotinamide mainly works by increasing the levels of free fatty acids and ceramides in the skin, stimulating microcirculation in the dermis layer and preventing skin moisture loss. Higher concentration nicotinamide can promote protein synthesis (such as keratin, collagen), and accelerate the differentiation of keratinocytes. This is why high concentration nicotinamide has some anti-aging effects, as it activates the proliferation of epidermal proteins, making the skin look plumper.
Because of its multiple functions, nicotinamide is a cost-effective ingredient that has been added to many popular skincare products for its ability to inhibit melanin formation.
If your skin becomes red after using nicotinamide, it may be due to its irritating effects on sensitive or very dry skin. Those with sensitive skin should perform a patch test on the hand or behind the ear before applying it to the face. Gradually building up tolerance to nicotinamide is also recommended. Start with a concentration of 1%-2%, and then increase the concentration gradually, by 1% after one week, two weeks and three weeks, respectively. Alternatively, for those who do not want to purchase different concentration products, mixing the nicotinamide serum with moisturizer or lotion is also a viable option.
Regarding the question of whether nicotinamide promotes hair growth, there is no definitive evidence to support this claim. However, some users have reported this effect. One possibility is that the difference in color contrast between the hair and the skin makes the hair look more visible after using nicotinamide. Another possibility is that nicotinamide might affect the hair follicle growth cycle or have other unknown mechanisms. Nevertheless, this effect remains unproven.