Last updated: November 2026
500mg per capsule · 3,125% NRV · one capsule is the daily maximum
B3 Nicotinic Acid 500mg Capsules — Flushing Niacin, Vegan, UK Encapsulated
Two ingredients. Nicotinic acid at 99.5–100.5% BP assay, in a plant-derived HPMC shell, filled in our own unit in Essex.
Read this before you order: one capsule is the entire maximum we state for any 24-hour period. It is not a starting dose.
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500mg nicotinic acid per capsule |
3,125% of the niacin NRV |
1 capsule maximum per day |
2 ingredients, both named |
Quick answer
What it is: nicotinic acid, the flushing form of vitamin B3, pre-weighed at 500mg per capsule. Also sold as niacin.
Serving: one capsule, taken with food and a full glass of water. That one capsule is 500mg, which is the maximum we state in any 24-hour period. Do not take two.
Format: vegan HPMC capsule. Two ingredients in total — nicotinic acid and the shell.
Health claims: niacin carries six authorised GB claims — energy-yielding metabolism, nervous system function, psychological function, normal skin, normal mucous membranes, and the reduction of tiredness and fatigue. All six quoted in full in the approved wording further down.
Expect a flush. At 500mg a flush is not a possibility, it is the normal response — warmth, redness and prickling across the face, neck and chest, starting 15 to 30 minutes in and usually settling within the hour.
Not suitable for: under-18s, pregnancy or breastfeeding, and anyone with liver disease, gout or raised uric acid, poorly controlled diabetes, active peptic ulcer, unstable angina or low blood pressure. Speak to your GP first if you take statins, blood pressure medication, warfarin or diabetes medication.
Packs: 60, 100, 200, 300 and 500 capsules. At one a day, 60 capsules is about two months and 500 capsules is over sixteen months.
On this page
Is this the right product if I have never taken niacin?
What will the flush feel like at 500mg?
Where does the 500mg ceiling come from?
What if I take another B3 product as well?
What is niacin authorised to claim?
What exactly is in each capsule?
What does the specification confirm?
How many should I take?
One capsule. That is 500mg of nicotinic acid, and 500mg is the maximum we state in any 24-hour period.
Take it with food and a full glass of water.
Do not take two. Two capsules is 1,000mg, and 1,000mg a day is where published sources stop describing nicotinic acid as a supplement intake. The NIH states that intakes at that level without a doctor's approval may cause harmful effects, and the CDC reports that adverse effects become markedly more common above it. That dose range is prescription lipid-therapy territory, given with liver function monitoring.
Most supplements let you scale the dose by taking more. This one does not. The capsule is the ceiling.
Is this the right product if you have never taken niacin?
Probably not, and we would rather say so here than have it come as a surprise.
At 500mg the flush is the normal response, not a risk. Around half of people flush at 100mg. By 250mg a flush should be expected, and 500mg is double that again. If you have never taken nicotinic acid, you have no idea yet how strongly you react to it — and a 500mg capsule gives you no way to find out gradually. You cannot take a third of a capsule.
The powder solves that. Same material, same assay, but you weigh your own dose, so you can start at 50mg and see how you respond before going anywhere near 500mg. It is also the cheaper route per serving. These capsules are for people who already know they tolerate the flush and want it pre-weighed, with no scales.
New to nicotinic acid?
Start with the powder, weigh 50mg, and come back to the capsules once you know how you react.
| Nicotinic Acid Powder — weigh your own dose |
| Nicotinamide Capsules — same vitamin, no flush |
What will the flush feel like at 500mg?
At this dose, expect a flush. Plan the first one for a day when you are at home.
Warmth, redness and prickling across the face, neck, chest and often the arms. It can itch. It usually begins 15 to 30 minutes after the capsule and settles within 30 to 60 minutes.
What causes it: nicotinic acid binds to a receptor called GPR109A on immune cells in the skin, which release prostaglandin D2. Small blood vessels near the surface widen and more blood flows close to the skin. It is a vascular response to the dose, not an allergic reaction, and not a sign of anything working.
Stop taking it and speak to a healthcare professional if a flush is severe, lasts beyond about 90 minutes, or comes with dizziness, breathlessness, swelling or a drop in blood pressure. That is not the ordinary flush.
If the flush is the thing you want to avoid rather than accept, you want the other form of vitamin B3. Nicotinamide carries the same six authorised claims and does not flush at all.
Where does the 500mg ceiling come from?
It is our own stated position, and it sits between two published figures. We would rather set it out than leave you guessing.
| Figure | What it is |
| 10mg a day | The published tolerable upper intake level for supplemental nicotinic acid in adults, and 8mg for 15 to 17 year olds. It was set by the Scientific Committee on Food in 2002 and derived from flushing — not from liver damage or any organ toxicity. |
| 500mg | Our stated maximum in any 24-hour period, and the amount in one of these capsules. |
| 1,000mg a day | The level above which published sources describe markedly more frequent adverse effects, and where nicotinic acid stops being a supplement intake. Never, without medical supervision. |
Being straight about the 10mg figure
A 500mg capsule is fifty times the published upper level. We are not going to pretend that number does not exist, because it does, it is easy to find, and you deserve to see it from us rather than find it later.
What matters is how that limit was arrived at. It was derived from flushing — the effect this page has already told you to expect — and not from organ toxicity. That is why almost every nicotinic acid product on the market, ours included, sits above it, and why nicotinamide's upper level is 900mg: ninety times higher, for the same vitamin, purely because it does not flush.
The harm figures that are about harm rather than discomfort sit much higher up: hepatotoxicity is rare but serious and is associated with chronic high-dose use, and adverse effects become markedly more common above 1,000mg a day. That is the boundary we hold, and it is why this page tells you not to take two capsules.
What if you take another B3 product as well?
Then add the niacin up, because the 500mg ceiling applies to your total intake and not to this product alone. This catches people out, because the other product is usually not the one labelled niacin.
| Combination | Total nicotinic acid |
| One of these capsules on its own | 500mg — at the ceiling |
| One of these plus one NMN + Niacin Complex capsule | 600mg — over the ceiling |
| Five NMN + Niacin Complex capsules | 500mg — at the ceiling |
Our NMN + Nicotinic Acid Niacin Complex carries 100mg of nicotinic acid per capsule alongside 400mg of NMN. People buy it for the NMN and do not always register the niacin, which also means that product flushes for around half the people who take it. If you take both, pick one route or keep the combined total within 500mg.
Nicotinamide does not count toward this. It is a different form with a published upper level of 900mg and it does not flush, so it does not stack against the nicotinic acid figure.
What is niacin authorised to claim?
Six authorised health claims
Quoted in the exact approved wording, checked against the GB Nutrition and Health Claims Register. These six statements, and only these six, may lawfully be made about niacin in Great Britain.
A serving needs 2.4mg of niacin — 15% of the 16mg NE reference value — before any of these claims may be used. One capsule supplies 500mg.
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✓ Authorised claim 01 “Niacin contributes to normal energy-yielding metabolism” What that means Niacin is converted in the body into two coenzymes that act as hydrogen carriers in the reactions releasing energy from carbohydrate, fat and protein. Without enough of them those reactions run less efficiently. This is about the machinery that processes food, not about feeling energetic. |
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✓ Authorised claim 02 “Niacin contributes to the normal functioning of the nervous system” What that means Nerve cells are among the most energy-hungry tissues in the body, and the same coenzymes supply that energy. Nerve function depends on it, which is why niacin status shows up in nervous system symptoms when intake is severely inadequate. |
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✓ Authorised claim 03 “Niacin contributes to normal psychological function” What that means The same energy pathways support the brain processes behind mood and thinking. The claim describes keeping a normal process running on adequate intake. It does not describe improving mood or cognition beyond normal. |
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✓ Authorised claim 04 “Niacin contributes to the maintenance of normal skin” What that means Skin renews itself constantly, and cell division and repair need the energy those coenzymes carry. Skin is one of the first tissues to show the effects of severe niacin inadequacy, which is how the link was established. |
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✓ Authorised claim 05 “Niacin contributes to the maintenance of normal mucous membranes” What that means Mucous membranes line the mouth, gut and airways, and they turn over faster than almost any other tissue in the body. That rate of renewal makes them dependent on the same energy-carrying coenzymes. |
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✓ Authorised claim 06 “Niacin contributes to the reduction of tiredness and fatigue” What that means The only one of the six that names a sensation. It was authorised on the basis of niacin's role in energy metabolism, and it describes the contribution of adequate intake, not a stimulant effect. Nicotinic acid is not a stimulant. |
You can check all six yourself on the GB Nutrition and Health Claims Register.
What exactly is in each capsule?
Two ingredients, and here they both are.
Nicotinic acid (vitamin B3) 500mg — 3,125% NRV. The active.
HPMC capsule shell — hydroxypropyl methylcellulose, derived from plant cellulose. It is the capsule itself, not a filler: it holds the powder, keeps moisture out and dissolves in the stomach. Vegan and gelatin-free.
That is the complete list. There is no anti-caking agent, no flow agent and no bulking agent, because at 500mg the active fills the capsule on its own and nothing else is needed to make it run.
Nutrition information
| Per capsule | Amount | % NRV |
| Niacin (as nicotinic acid) | 500mg | 3,125% |
NRV = Nutrient Reference Value. The niacin NRV is 16mg NE (niacin equivalents).
Full specification
| Ingredient | Nicotinic acid (niacin), vitamin B3 |
| Assay | 99.5–100.5% on a dry basis |
| Pharmacopoeia standard | BP |
| Molecular formula | C6H5NO2 |
| Molecular weight | 123.11 |
| CAS number | 59-67-6 |
| EC number | 200-441-0 |
| Melting point | 234–240°C |
| Loss on drying | Max 1% |
| Sulphated ash | Max 0.1% |
| Chloride | Max 0.02% |
| Heavy metals, total | Max 20 mg/kg |
| Lead / cadmium / mercury / arsenic | Max 3 / 1 / 0.1 / 1 mg/kg |
| Manufacturing route | Synthetic, from 3-cyanopyridine by hydrolysis |
| Country of origin | China (encapsulated in the UK) |
| Capsule shell | HPMC, plant-derived, vegan, gelatin-free |
| Suitable for | Vegans and vegetarians |
| Other status | TSE/BSE free, non-GM, non-irradiated, EU MRL and PAH compliant |
| Pack sizes | 60, 100, 200, 300 and 500 capsules |
What does the specification confirm?
Identity and strength. The assay range confirms the material is nicotinic acid at 99.5–100.5%, against the British Pharmacopoeia standard, with the melting point and molecular identifiers to match.
Purity. Loss on drying, sulphated ash and chloride are all specified and limited, which is what tells you the assay figure is not being propped up by moisture or residue.
Heavy metals. Lead, cadmium, mercury and arsenic are each held to a stated individual limit, not just a combined total.
Allergens. All fourteen named allergens are absent, at the supplier's lowest risk rating.
Certificate of analysis on request. Send us the batch number from your pack through the contact page and we will send the certificate for that batch.
Allergens
All fourteen named allergens are absent from this product: cereals containing gluten, crustaceans, eggs, fish, peanuts, soybeans, milk, nuts, celery, mustard, sesame seeds, sulphur dioxide and sulphites, lupin and molluscs.
Who should not take this?
Do not take this product, or speak to your GP first, if any of the following apply:
Liver disease · gout or raised uric acid · poorly controlled diabetes · active peptic ulcer · unstable angina · low blood pressure · more than a modest alcohol intake
Medicines that matter: statins, blood pressure medication, warfarin and diabetes medication. Nicotinic acid can affect blood pressure in its own right, which is what makes the blood pressure interaction worth taking seriously.
Adults 18 and over only. Not for use during pregnancy or while breastfeeding.
One capsule maximum in 24 hours. Take with food and a full glass of water. Keep out of reach of children. Store cool, dry and out of direct sunlight.
Wholesale, bulk and trade supply
We encapsulate in our own unit in Southend-on-Sea, which means trade orders are filled from the same material and the same line as retail packs, with no third-party contractor in between.
Independent |
Online |
Supplement |
Private label |
Gyms and |
Compounding |
Subscription |
Export and |
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Encapsulated in house Our own unit, our own line. No contract filler, so lead times are ours to control. |
Documentation per batch Certificate of analysis for the batch you receive, with the supplier technical dossier available on request. |
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Powder or capsules The same material is available as bulk powder from 50g to 25kg if you fill your own. |
5 Star rated premises 5 Star Food Hygiene Rating, trading since 2016, 164,000+ verified sales. |
We supply bulk nicotinic acid capsules UK, wholesale niacin capsules, trade vitamin B3 supply, B3 capsules wholesale UK, nicotinic acid 500mg bulk, private label niacin capsules, white label vitamin B3, flush niacin wholesale, niacin capsules B2B UK, bulk vitamin B3 supplier, contract encapsulation niacin, niacin capsules trade price, wholesale flushing niacin UK, B3 nicotinic acid bulk supply and niacin capsule manufacturer UK to buyers across the UK and into Europe.
Trade questions
What is the minimum order?
Lower than most contract fillers will quote, because we are filling from our own stock rather than scheduling a production run. Tell us the quantity and format and we will quote it.
How is trade pricing structured?
Per unit, stepped by volume, quoted against your actual order rather than published tiers.
What documentation comes with an order?
Certificate of analysis for the batch supplied. The supplier technical dossier, allergen statement and TSE/BSE declaration are available on request.
What are lead times?
Stock quantities dispatch same day on weekdays. Larger fills depend on volume and we will give you a date before you commit.
Do you do private or white label?
Yes, including unbranded bulk in your own packaging. Note that you take on the labelling and dose-statement responsibility with it — for nicotinic acid specifically, that includes stating a maximum.
Request a trade quote →How many people have actually bought this?
4,551 sold
of this exact product, through our eBay listing
99.7% positive feedback on that listing
That is a figure for this capsule, not for the shop. It is published on the listing itself, so you can go and check it rather than take our word for it.
| See the 4,551 sold on eBay → |
Store-wide we have 164,000+ verified sales at 99.8% positive. All of those are transaction feedback, which is about the service rather than the product, so we show the figures as they are and do not convert them into a star rating here. The live ratings are on the listing above and on our eBay store page.
Other items you might want
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All vitamins → |
Niacin flush explained → |
Why buy from us
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164,000+ verified sales |
99.8% positive feedback |
5 Star food hygiene rating |
2016 trading since |
Where to buy
Buy direct here, or through our eBay listing for this product if you would rather use eBay's buyer protection. Same batches either way — both are filled and packed in the same unit in Essex. Buying direct is normally cheaper, because there is no marketplace fee in the price.
Subscribe & Save takes 10% off repeat deliveries. Klarna and Shop Pay are available at checkout.
Buy on eBay instead — 4,551 sold →Questions
How many capsules should I take a day?
One. Each capsule contains 500mg of nicotinic acid, and 500mg is the maximum we state in any 24-hour period, so one capsule is the whole daily allowance rather than a single serving you can repeat. Take it with food and a full glass of water.
Can I take two capsules a day?
No. Two capsules is 1,000mg, which is above the level where published sources report markedly more frequent adverse effects, and it is the dose range used in prescription lipid therapy with liver function monitoring. Do not take 1,000mg or more a day without medical supervision.
Will these capsules make me flush?
At 500mg you should expect to. Around half of people flush at 100mg and a flush should be expected at 250mg and above, so 500mg is well into the range where it is the normal response. It usually starts 15 to 30 minutes after the capsule and settles within 30 to 60 minutes.
I have never taken niacin before. Should I start with these?
We would suggest not. A 500mg capsule cannot be divided, so it gives you no way to find out gradually how strongly you react. The nicotinic acid powder lets you weigh 50mg and build up from there, and it is cheaper per serving.
Is there a form of vitamin B3 that does not flush?
Yes, nicotinamide, also sold as niacinamide. It is the same vitamin, carries the same six authorised claims, does not flush, and has a published upper intake level of 900mg a day against 10mg for nicotinic acid.
What is actually in each capsule?
Two things: 500mg of nicotinic acid, and the HPMC capsule shell that holds it. There is no filler, flow agent or anti-caking agent, because at 500mg the active fills the capsule on its own.
Are these capsules suitable for vegans?
Yes. The shell is HPMC, which is derived from plant cellulose rather than gelatin, and the nicotinic acid is synthetic rather than animal-derived.
Can I take these alongside your NMN + Niacin Complex?
Only if you total the niacin. The complex carries 100mg of nicotinic acid per capsule, so one of each is 600mg and over the 500mg ceiling. Pick one route, or keep the combined total within 500mg in any 24-hour period. Nicotinamide does not stack against this figure, because it is a different form with a 900mg upper level.
Why is 500mg so far above the published upper level of 10mg?
Because that 10mg figure was derived from flushing rather than from organ toxicity. The Scientific Committee on Food set it in 2002 on the basis of the flush, which is why almost every nicotinic acid product sits above it, and why nicotinamide's upper level is ninety times higher for the same vitamin.
Can I take niacin with statins or blood pressure medication?
Speak to your GP or pharmacist before you do. Statins, blood pressure medication, warfarin and diabetes medication are all relevant, and nicotinic acid can affect blood pressure in its own right.
Can I get a certificate of analysis?
Yes. Send us the batch number from your pack through the contact page and we will send the certificate for that batch.
How this page is written
Every specification figure comes from the manufacturer's technical dossier for the nicotinic acid we encapsulate. Nothing is estimated and nothing is rounded in our favour.
All six health claims are quoted in the exact wording of the GB Nutrition and Health Claims Register, which is linked above so you can check them. The plain-English paragraph under each one explains the mechanism behind the authorised claim and adds nothing to it.
The dose figures and the flush percentages are taken from published sources including the Scientific Committee on Food, the NIH Office of Dietary Supplements and the CDC. The 500mg ceiling is our own stated position and we have shown you where it sits relative to both published figures.
Charge Products has supplied supplements and raw ingredients from Southend-on-Sea since 2016, and encapsulates in its own 5 Star rated unit. Page last reviewed November 2026.
Food supplement. Not a substitute for a varied and balanced diet or a healthy lifestyle. Do not exceed the stated dose. Keep out of reach of young children. Adults 18 and over only. Not for use during pregnancy or while breastfeeding.
Nothing on this page is medical advice. If you take prescription medication or are under medical supervision, speak to your doctor or pharmacist before use.
Charge Products is a trading name of Big Idea Services Ltd, Company No. 11645389, VAT GB11645389. Unit 1, 8 Towerfield Road, Southend-on-Sea, Essex SS3 9QE. 5 Star Food Hygiene Rating.
| Capsules |
60 x Capsules, 100 x Capsules, 200 x Capsules, 300 x Capsules, 500 x Capsules |
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