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Source Naturals

Niacinamide B-3, 100 mg, 250 Tablets

4.7 · 1581 reviews
1,121 ₽

Dietary Supplement Non GMO Validated Suitable for Vegetarians Niacinamide, also known as vitamin B-3, functions in over 50 metabolic reactions, most of which are enzymatic. Its bioactive forms - NAD+, NADH, NADP, and NADPH - play important roles as catalysts in the energy production process in the cells, the breakdown of proteins and fatty acids, the synthesis of fatty acids, and the formation of steroid hormones and red blood cells. Niacinamide functions as niacin, without the characteristic "flush".

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Dietary Supplement Non GMO Validated Suitable for Vegetarians Niacinamide, also known as vitamin B-3, functions in over 50 metabolic reactions, most of which are enzymatic. Its bioactive forms - NAD+, NADH, NADP, and NADPH - play important roles as catalysts in the energy production process in the cells, the breakdown of proteins and fatty acids, the synthesis of fatty acids, and the formation of steroid hormones and red blood cells. Niacinamide functions as niacin, without the characteristic "flush".

Customer reviews

5.0
verified purchase
A great product for the skin, metabolism and nervous system

With regular use, it has a positive effect on the skin. It has a soothing effect on the skin, it becomes finer and more even. It also has a positive effect on the nervous system. Improves metabolism.

11/2/2023
5.0
verified purchase
One of the lower doses of niacinamide available

These are thin enough to break into half. I appreciate it because I don't want a whole lot at a time, rather several smaller doses a day.

3/6/2025
5.0
verified purchase
Tiny tablet, big job

Review: I bought this Niacinamide B-3 because my body apparently enjoys vitamins more than vegetables 😅. The tablets are small and easy to take, and the bottle has a lot of them so it lasts forever. I like that it’s simple and good quality with no weird taste. Overall a great addition to my daily routine. My energy and skin seem happy, so I’m happy too!

3/15/2026
5.0
verified purchase
Great Find

I've been looking for this to pair with my skin care routine. This is a great addition to my skin care routine not just for outside but inside. The packaging, quality, delivery is good. Great and safe ingredients that fits to what I need. Easy to swallow pill, price is reasonable.

3/3/2026
5.0
verified purchase
Vitamin B3 supplementation

Solid choice for B3 supplementation. Niacinamide (the non-flushing form) supports energy metabolism, skin health, and cellular function. The 100mg dose is moderate and well-tolerated by most people. Source Naturals is a reputable brand. Great value with 250 tablets.

1/27/2026
5.0
verified purchase
excellent

Value for money pack. I feel them good for .y skin and aging.

12/11/2025
5.0
verified purchase
good supplements

So for me personally, nicotinamide is good for overall health. I like the skin benefits, mood calming, the feeling of liking healthier foods more, and appetite suppressant effects.

11/18/2025
5.0
verified purchase
Source Naturals, Niacinamide (Vitamin B3), 100 mg, 100 Tablets – Gentle B3 Supplement

A non-flushing form of vitamin B3 traditionally used to support cellular energy and skin health. The tablets are mild and suitable for those looking for daily nutritional support.

11/10/2025
5.0
verified purchase
Gentle Vitamin B3 – Perfect for Daily Energy and Skin Health

Excellent low-dose niacinamide—ideal for people who prefer a gentle, non-flush form. The 100 mg per tablet is modest but practical for stacking or frequent dosing throughout the day. Brand quality is consistent, tablets are easy to swallow, and the 250-count bottle lasts ages. Great everyday B3 at a friendly price.

11/1/2025
4.0
verified purchase
ok

Can't say whether it's affecting my NADH levels, after 2 weeks. But I CAN say it's affecting my testosterone levels. Plagued by night-long hard ons. Not every night, but several times a week. Helluva lot cheaper than Viagra. I looked it up, it's a thing, it's a testosterone precursor.

10/21/2025