🔴 Flush Niacin Warning — Read Before Purchasing
This product contains nicotinic acid — the flushing form of vitamin B3. Most people who take nicotinic acid at 500mg will experience a niacin flush — a temporary sensation of warmth, tingling or itching with visible skin reddening on the face, neck and chest. The flush is harmless and not an allergic reaction, but it can be uncomfortable, especially for first-time users.
What causes it: Nicotinic acid causes capillary dilation — small blood vessels under the skin expand, increasing blood flow to the skin surface. This produces the characteristic flush. It typically begins 15–30 minutes after taking the capsule and subsides within 30–60 minutes.
How to reduce it: Always take with food. Start with a lower dose if you are new to flushing niacin and build up gradually. Many people find the flush reduces significantly or disappears entirely with continued regular use as the body adapts.
If you want flush-free vitamin B3: This is not the right product for you. Please see our Nicotinamide (Niacinamide) Capsules — the no-flush form of vitamin B3.
📋 Food Supplement — High Strength: This is a food supplement — not a medicine. Each capsule provides 500mg niacin (nicotinic acid) = 3,125% of the EU/UK NRV (16mg). High-strength vitamin B3 supplement. Consult a healthcare professional before use if taking prescription medications, if you have liver disease, peptic ulcers, gout, diabetes or cardiovascular conditions. Not for use during pregnancy or breastfeeding without medical advice.
💊 B3 Niacin Nicotinic Acid 500mg Capsules UK — The Flushing Form of Vitamin B3
B3 Niacin Nicotinic Acid 500mg capsules from Charge Products supply 500mg of pure nicotinic acid per capsule — the original, classical flushing form of vitamin B3 — with no fillers, no binders and no anti-caking agents. If you want to buy vitamin B3 niacin UK in the nicotinic acid (flushing) form and buy niacin UK in the nicotinic acid (flushing) form, this page provides the full specification, the science behind nicotinic acid as a form of vitamin B3, the complete set of authorised EU/UK health claims, and clear information about the niacin flush so you can make an informed purchase decision. Available in 60, 100, 200, 300 and 500 capsule formats from £6.95.
Niacin is the generic name for vitamin B3. Nicotinic acid is the specific chemical form of niacin in this product — distinct from nicotinamide (niacinamide), which is the no-flush alternative form. The critical difference between the two forms is that nicotinic acid causes the niacin flush (vasodilation of capillaries under the skin) while nicotinamide does not. Both are forms of vitamin B3 and share the same authorised EU/UK health claims. The flushing form (nicotinic acid) is specifically sought by buyers who want this vasodilating property or who are following protocols that require the flushing form specifically.
Supplied by Charge Products — an established UK supplement supplier since 2016 with 149,000+ verified marketplace sales and a 5 Star Food Hygiene Rating. UK-held stock. Same-day dispatch before 3:30pm Mon–Fri.
✅ Authorised EU/UK Health Claims — Niacin (Vitamin B3)
The following health claims are authorised under EU/UK food law (Regulation EC 1924/2006 as retained in UK law) for niacin. These apply to products that are a significant source of niacin — this product provides 500mg per capsule (3,125% NRV):
⚡ Energy Metabolism
Niacin contributes to normal energy-yielding metabolism
🧠 Nervous System
Niacin contributes to normal functioning of the nervous system
🧘 Psychological Function
Niacin contributes to normal psychological function
💪 Tiredness & Fatigue
Niacin contributes to the reduction of tiredness and fatigue
🌿 Skin & Mucous Membranes
Niacin contributes to the maintenance of normal skin and mucous membranes
🛡️ Mucous Membranes
Niacin contributes to the maintenance of normal mucous membranes
Authorised under Regulation EC No 1924/2006 as retained in UK law. Source: EU Register of Nutrition and Health Claims.
🔬 Niacin (Vitamin B3) — Science & Chemistry
Educational context only — health claims for this product are limited to the 6 authorised claims above.
⚗️ What Is Nicotinic Acid?
Nicotinic acid (pyridine-3-carboxylic acid) is the original form of vitamin B3 and the most studied. It is a water-soluble essential vitamin — the body cannot produce sufficient amounts from diet alone in many circumstances, making dietary or supplemental intake important. The body converts nicotinic acid into NAD (nicotinamide adenine dinucleotide) and NADP, coenzymes that participate in over 400 enzymatic reactions, particularly in energy metabolism, DNA repair and redox reactions across all body tissues.
🔬 Niacin → NAD Pathway
Nicotinic acid is a precursor to NAD — one of the most fundamental coenzymes in cellular biology. NAD is required as a coenzyme in over 400 biochemical reactions, including energy production via the citric acid cycle and electron transport chain, DNA repair via PARP enzymes, and the activation of sirtuins (longevity-related proteins). Niacin (as nicotinic acid) is a niacin NAD precursor UK — one of the original dietary routes to supporting NAD synthesis alongside protein-derived tryptophan. Note: NMN and NR are other, more direct NAD precursors — see our NMN and NR supplement range.
🔴 The Niacin Flush — What Actually Happens
The niacin skin flush UK is caused by nicotinic acid binding to prostaglandin receptors (specifically GPR109A) in skin capillaries. This triggers prostaglandin D2 and E2 release, causing capillary vasodilation — widening of the small blood vessels beneath the skin surface. Blood flow to the skin increases dramatically, producing the characteristic redness, warmth and tingling sensation. The flush is not an allergic reaction. It typically begins 15–30 minutes post-dose and resolves within 30–60 minutes. Nicotinamide does not activate these receptors — which is why it does not cause flushing.
💊 500mg vs NRV — Dose Context
The EU/UK Nutrient Reference Value (NRV) for niacin is 16mg per day. A typical varied diet in the UK provides approximately 20–35mg of niacin equivalents daily. This product provides 500mg per capsule — equivalent to 3,125% NRV — which is a high-strength supplemental dose well above normal dietary intake. This strength level is specifically sought by users following high-dose niacin protocols under healthcare guidance. Always follow the label dosage and consult a healthcare professional for high-dose use.
⚖️ Nicotinic Acid vs Nicotinamide UK — Niacin vs Nicotinamide UK: Choosing the Right Form
| Property | Nicotinic Acid UK ← This Product | Nicotinamide (No-Flush) |
|---|---|---|
| Also known as | Niacin · B3 niacin · nicotinic acid | Niacinamide · nicotinamide · B3 no-flush |
| Niacin Flush? | 🔴 YES — causes skin flushing at 500mg | ✅ NO — flush-free |
| Authorised Claims | ✅ Same 6 authorised EU/UK claims | ✅ Same 6 authorised EU/UK claims |
| Vasodilation | Yes — binds GPR109A prostaglandin receptors | No vasodilating action |
| NAD Precursor | Yes — via Preiss-Handler pathway | Yes — via direct conversion to NAD |
| Taste | Slightly sour / acidic | Mild / bland |
| Choose If | You specifically want flushing niacin · nicotinic acid form | You want vitamin B3 without the flush |
🧪 Full Specification — B3 Niacin Nicotinic Acid 500mg Capsules UK
| Specification | Detail |
|---|---|
| Active Ingredient | Nicotinic Acid (Niacin · Vitamin B3) |
| Amount Per Capsule | 500mg Nicotinic Acid |
| % NRV | 3,125% (NRV = 16mg) |
| Form | Nicotinic Acid — Flushing Form · Niacin Flush Capsules UK |
| Capsule Shell | HPMC — plant-derived · vegan · no gelatin |
| ✅ No Fillers or Binders | No maltodextrin · no rice flour · no magnesium stearate · no silicon dioxide |
| Suitable For | Vegans · Vegetarians · Adults only |
| Pack Sizes | 60 · 100 · 200 · 300 · 500 capsules |
| Dispatch | 🇬🇧 UK Stock — Same-day before 3:30pm Mon–Fri |
🔴 How to Reduce the Niacin Flush — Step-by-Step Guide
The niacin flush is harmless — but it can be uncomfortable, especially the first time. These evidence-based strategies help significantly reduce its intensity:
1 ⃣ Always Take With Food
The single most effective method. Taking nicotinic acid with a meal — particularly one containing fat — slows absorption and dramatically reduces flush intensity. Never take on an empty stomach, especially when starting out.
2 ⃣ Start Low, Build Up Gradually
If you're new to flushing niacin, starting at a lower dose and gradually increasing over several weeks allows the body to adapt. Many users begin with a lower-strength product (e.g. 50mg or 100mg) before progressing to 500mg.
3 ⃣ Consistency Reduces Flush Over Time
The niacin flush typically diminishes significantly with continued regular use. Most people find that after 2–4 weeks of daily use, the flush becomes much milder or disappears entirely as prostaglandin receptor sensitivity adapts.
4 ⃣ Avoid Hot Drinks & Alcohol Beforehand
Hot drinks, alcohol and spicy food can all cause vasodilation independently — taking niacin alongside any of these significantly increases flush intensity. Take with cool or room-temperature water and avoid alcohol on the same occasion.
5 ⃣ Take at the Same Time Each Day
Irregular dosing — skipping days then resuming — resets flush tolerance. Taking niacin at the same time daily with the same meal maintains consistent receptor adaptation and helps the flush reduce progressively with each passing week.
6 ⃣ No Flush? Try Flush-Free B3
If the flush is consistently uncomfortable and you don't specifically need the nicotinic acid form, consider switching to Nicotinamide (Niacinamide) Capsules — identical vitamin B3 claims, no flush.
⚠️ Important: If you experience severe, prolonged or repeated flushing (beyond 60–90 minutes), discontinue use and consult a healthcare professional. The flush should be temporary and self-resolving. Severe reactions may indicate an underlying sensitivity or interaction with other medications.
💡 How to Take Niacin Nicotinic Acid 500mg Capsules
Suggested Use
- Take as directed on the product label
- Always take with food — reduces flush intensity significantly
- Take with a full glass of water
- Do not exceed the recommended daily intake
- If new to nicotinic acid, consider starting with a lower dose
Pack Supply Guide
- 60 capsules: 2 month supply (1 per day)
- 100 capsules: 3+ month supply
- 200 capsules: 6+ month supply
- 300 capsules: 10 month supply
- 500 capsules: Best value · 16+ month supply
⚠️ Consult a GP Before Use If: You take prescription medications including blood pressure drugs, blood thinners (warfarin), diabetes medications, or statins. Do not use if you have active liver disease, peptic ulcers or a history of gout without medical advice. Not for use during pregnancy or breastfeeding without medical guidance. High-dose niacin (above NRV) should be used under healthcare supervision.
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🛒 Where to Buy Niacin Nicotinic Acid 500mg Capsules UK
You can buy niacin 500mg capsules UK, buy niacin UK, buy nicotinic acid UK and buy niacin capsules UK, buy nicotinic acid capsules UK and buy B3 niacin capsules UK direct from Charge Products on this page, or from our eBay store. All five sizes (60 to 500 capsules) are available here with free UK delivery on orders over £10 and same-day dispatch.
🛒 Also Available on eBay UK
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❓ Frequently Asked Questions — B3 Niacin Nicotinic Acid 500mg UK
What is niacin (nicotinic acid)?
Niacin is vitamin B3. Nicotinic acid is the flushing form — the original chemical form of vitamin B3 that causes vasodilation (capillary dilation) in the skin. The body uses nicotinic acid to produce NAD and NADP — coenzymes involved in over 400 enzymatic reactions. Food supplement — not a medicine.
🔴 What is the niacin flush and is it dangerous?
The niacin flush is harmless but can be uncomfortable. Nicotinic acid causes capillary vasodilation in the skin, producing warmth, tingling, itching and visible redness — typically on the face, neck and chest. It begins ~15–30 minutes after taking the capsule and resolves within 30–60 minutes. It is not an allergic reaction. Always take with food to reduce intensity. Many users find it diminishes with continued use.
What is the difference between nicotinic acid and nicotinamide?
Nicotinic acid (this product) causes the niacin flush. Nicotinamide (niacinamide) does not cause flushing. Both are forms of vitamin B3 and share the same authorised EU/UK health claims. Nicotinic acid has vasodilating properties via GPR109A prostaglandin receptors — nicotinamide does not. If you want flush-free B3 see our Nicotinamide Capsules.
What are the authorised health claims for niacin?
Six authorised EU/UK claims: niacin contributes to normal energy-yielding metabolism · normal functioning of the nervous system · normal psychological function · reduction of tiredness and fatigue · maintenance of normal skin and mucous membranes · maintenance of normal mucous membranes. Authorised under Regulation EC No 1924/2006.
How much niacin is 500mg compared to the NRV?
The EU/UK NRV for niacin is 16mg per day. Each capsule provides 500mg = 3,125% NRV — a high-strength dose significantly above normal dietary levels. This supplement is for adults who specifically require high-dose nicotinic acid. Consult a healthcare professional before use.
Can I take niacin with medications?
Consult your GP first if taking blood pressure medications, warfarin, statins, diabetes medications or any prescription drugs. High-dose nicotinic acid can interact with these drug classes. Do not use with active liver disease, peptic ulcers or history of gout without medical advice.
How do I reduce the niacin flush?
Always take with food — this is the most effective method. Start with a lower dose if new to niacin. Many users find the flush reduces significantly or disappears entirely with continued regular use as the body adapts to nicotinic acid.
Are these niacin capsules vegan?
Yes — 100% vegan and vegetarian. HPMC plant-derived capsule shell, no gelatin, no animal-derived ingredients, no fillers and no binders.
Is niacin the same as NAD?
No — niacin is a precursor to NAD. The body converts nicotinic acid into NAD via several enzymatic steps (the Preiss-Handler pathway). NAD (nicotinamide adenine dinucleotide) is the active coenzyme form required in over 400 reactions. For more direct NAD+ precursors, see our NMN Capsules and Nicotinamide Riboside (NR).
Is niacin nicotinic acid available for wholesale?
Yes — bulk and wholesale formats up to 500 capsules for health retailers, gyms, sports nutrition brands and trade buyers. UK-held stock with same-day dispatch. Contact us for trade pricing →
⭐ What Our Customers Say — Verified Reviews
Verified UK buyers on Trustpilot ↗ and eBay ↗
★★★★★
"Excellent quality niacin"
"I previously used Solgar but decided to try these and found them to be even better. The quality is superior, the results are noticeable, and they feel very clean and effective."
eBay Buyer · GB · 2025 · ✓ Verified
★★★★★
"Consistently outperforms other brands"
"We have tested a few brands and the performance of the products from Charge consistently out perform the others."
KP · GB · Jun 2025 · ✓ Verified
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"Quality, potency and great value"
"Quality, condition and value for money. Plus packaging are all excellent. Also potency is powerful, with appropriate warnings, just as I like it."
eBay Buyer · GB · 2025 · ✓ Verified
★★★★★
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"I've been buying from Charge for about 7 or 8 years now — everything I've bought is high quality with prompt delivery."
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📍 Charge Products — UK Supplement Supplier
Charge Products is an established UK vitamin supplement supplier — eBay's #1 ranked seller on verified sales in the health supplement category — with over 10 years of trading history, 149,000+ confirmed marketplace sales and a 5 Star Food Hygiene Rating. We supply B3 niacin nicotinic acid capsules, nicotinamide capsules, NMN capsules, vitamin D3 K2, magnesium glycinate and a wide range of health supplement products to retail customers, trade buyers and wholesale purchasers across the United Kingdom. UK-held stock, same-day dispatch, transparent specifications throughout.
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Disclaimer: This product is a food supplement — not a medicine. Not intended to diagnose, treat, cure or prevent any disease. Nicotinic acid (niacin) will cause a niacin flush in most users at 500mg — this is a known, harmless physiological response to nicotinic acid and not an allergic reaction. Always take with food. High-dose nicotinic acid should be used under healthcare supervision. Do not exceed the recommended daily intake. Consult a GP or healthcare professional before use if you take prescription medications including blood pressure drugs, blood thinners, statins, diabetes medications or any other prescribed medicines. Do not use if you have active liver disease, peptic ulcers or history of gout without medical advice. Not suitable during pregnancy or breastfeeding without medical guidance. Keep out of reach of children. Store in a cool, dry place away from direct sunlight.
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60 x Capsules, 100 x Capsules, 200 x Capsules, 300 x Capsules, 500 x Capsules |
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