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⏳ Unlock steady energy & glow with no-flush niacinamide — your daily wellness upgrade!
21st Century Niacinamide 500mg Prolonged Release tablets provide a steady, no-flush source of vitamin B-3 to support energy metabolism, skin health, and nervous system function. Crafted with vegan, gluten-free, and non-GMO ingredients, this clean formula is free from artificial additives and manufactured under strict cGMP standards for purity and potency. Ideal for professionals seeking sustained vitality and radiant skin without compromise.













| ASIN | B004SCKMQS |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #8,110 in Health & Household ( See Top 100 in Health & Household ) #10 in Vitamin B3 (Niacin) Supplements #870 in Sales & Deals |
| Brand | 21st Century |
| Brand Name | 21st Century |
| Color | No Color |
| Customer Reviews | 4.6 out of 5 stars 5,499 Reviews |
| Diet Type | Vegan |
| Dosage Form | Tablet |
| Flavor | Unflavored |
| Global Trade Identification Number | 00740985225509 |
| Item Dimensions | 2 x 3 x 4 inches |
| Item Form | Tablet |
| Item Highlight | Vitamin B-3 Niacinamide 500 mg, Energy Metabolism & Skin Health Support, No-Flush Formula, Prolonged Release, Non-GMO Tablets |
| Item Weight | 5.28 ounces |
| Manufacturer | 21st Century Healthcare, Inc. |
| Manufacturer Part Number | B00375BOKU |
| Model Name | av2023-21st Century-mg prolonged release tablets-5f0674d8 |
| Model Number | 22550 |
| Number of Items | 1 |
| Primary Supplement Type | Vitamin-b |
| Product Benefits | Helps convert food into energy and helps maintain skin, digestive and nervous systems |
| Special Ingredients | Gluten Free |
| Specific Uses For Product | Digestive,Skin,Energy |
| UPC | 740985225509 |
| Unit Count | 110 Count |
H**R
time-release Niacinamie + time-release melatonin... Great sleep FINALLY!
So, wow. Fellow strugglers of proper sleep: perhaps you got to here after learning about the "Healthy Sleep Formula" created by Steve Gibson, as I did. If not, and sleep is an issue for you, I highly recommend you google "Healthy sleep formula" to get to the page on grc .com. That guy has a HUGE following. So much so that when he developed his version 2.0 of the sleep formula and recommend a specific brand of Niacinamide, it sold out everywhere. I knew right then that there must be something to this formula of his. Then he popped back with an update stating that this brand was officially recommended after it had been tested out. I would have never thought that Niacinamide (the amide of nicotinic acid (vitamin B3 / niacin)) + melatonin could be such a magic sleep cocktail. And trust me, at this point I have tried a lot of different supplements. I suffer from the kind of insomnia where you can easily go to sleep, but not remain asleep (sleep-maintaining insomnia disorder)... tossing and turning, rarely getting into deep sleep/REM and waking up everyday feeling pretty exhausted. What a waste of time, honestly. I have been on a long road of finding ways to improve this issue through healthy means, trying my best to avoid actual sleeping pills. Things would work for a bit... then no longer be effective and it would be this endless chase for the next sleep fix. But this formula offered me something new: a combination of 2 time-release pills taken together. It addressed my exact needs. And I am here to say, it works. It WORKS LONG-TERM. I have been doing this formula of time-release Nicinamide and time-release melatonin for several weeks now and its amazing the energy I have now. Many days I wake up about 10-15 minutes before my scheduled alarm for work, have much more vivid dreams, have no issue getting out of bed and out the door, actually feel like going to the gym on my lunch break instead of taking a car nap...it's put me on a great healthy schedule overall and feeling top of my game. I actually look forward to bedtime now. If you do Steve's formula, you have to figure out what is best for you. I will state that I am not a sensitive person and typically need higher dosages of things. In my experimenting I have found that 1250mg of Niacinamide + the 1mg melatonin works best for me to sleep through the night without crossing over into groggy-ville. It is one reason why I like this brand being a lower dosage of 500mg, so I can easily up 1/2 and full dosages cutting the pills. It was very much a goldilocks situation... 1 is too little... 2 is too little... 3 IS TOO MUCH IM IN A HAZE... 2.5 is just right :D So thats my story of Niacinamide and how it's solved my sleep-maintaining insomnia. Pretty amazing, I can't fully believe it yet. Just in case you are wondering the breadcrumb trail of how I got here... it went: friend told me about GABA... and combining with taurine to be more effective. I researched GABA and stumbled on a "sleep hacking through biochemistry" blog... read about all these things to help get you into sleep faster and more lasting, and replacing 5-HTP with tryptophan (but it mentioning a high tryptophan diet might not be healthy so being careful not to use constantly)...blah blah read some reviews on the tryptophan I was getting and mentioning Steve Gibson's healthy sleep formula. His 1st generation formula used a handful of all those aforementioned things till he developed the 2nd gen one. Glad I jumped on board after that point! Its cheap and super effective.
P**L
Recommended and works
Recommended by my skin doctor and it does have skin benefits that I can see since using.
T**L
Yay
Perfect thanks saves so much time on having to run and pick up but usps is scary they leave packages everywhere and anywhere
A**R
Not dead yet.
I’m not dead yet, so it’s working, I guess. Skin doctor recommended, and this is least expensive version I have found.
J**E
Health help
Directed to take from my physician
P**L
Recommended by Derm
My dermatologist recommended this after I had a bought with skin cancer. There is no after taste, and it’s easy to swallow.
S**Y
I recommend 100x 200
Digestibility,and support immunity,easy swallow.
M**N
Difficult to take and no noticible differences
These are difficult for us to swallow. They don't really have a coating and seem to "stick" when you try to swallow them even with sufficient water or any other beverages. I can't really even tell you if they work because I hate taking them. I have not even taken a quarter of them and likely won't continue as it is an unpleasant experience and not worth it without an noticible benefits. I can say that I've never had trouble swallowing other medications but my daughter has trouble with these as well and she takes several vitamins/supplements a day. It's of course up to you but since there's really no major savings to go with another brand,then that's what I personally intend to do.
S**R
سعر مناسب ب٣
النياسين مهم جدا للدورة الدموية
I**S
It’s amazing for skin and hair
This is really improved my skin and hair, of course I am on healthy diet and I’m taking other vitamins and minerals. my body absorbs it easily no stomach irritation or smell. My hair was good but after this vitamin now I rarely see one two hairs falling per day. I’m sensitive and not any supplement fits me but my body didn’t show any allergic reaction. And delivery was fast.
L**S
Bom
Estou tomando estou achando muito bom
T**Y
Niacinamide
Great product.
E**P
Satisfied
Satisfied
Trustpilot
1 week ago
3 weeks ago