21st Century Niacin 250 mg Tablets, 110 Tablets (Pack of 2)

Health Benefits of Niacin

Niacin, also known as vitamin B3, contributes to normal energy-yielding metabolism, helping your body convert food into usable energy. It also supports the maintenance of healthy skin, the normal function of the nervous system, and the proper functioning of the digestive system. These benefits are recognized under EU/UK nutrition and health claims regulations.*

*These statements have not been assessed by the MHRA. This product is a food supplement and is not intended to diagnose, treat, or prevent any disease. Food supplements should not be used as a substitute for a varied diet.

Understanding How Niacin Works

Vitamin B3 is a water-soluble vitamin that acts as a key component of coenzymes NAD and NADP, which are involved in hundreds of metabolic reactions throughout the body. Naturally found in foods such as meat, fish and poultry, niacin supplementation can help fill dietary gaps and support your overall wellness. Each 250 mg tablet provides a potent dose to help maintain steady energy levels throughout the day.

How to Take Niacin 250 mg Tablets

Adults should take one tablet daily with a meal, or as directed by your health care provider. Due to the high strength, you may experience a temporary warming or flushing sensation on the skin, known as niacin flush. This harmless effect can be minimised by taking the tablet with food or by starting with a lower dose. Do not exceed the recommended intake unless under medical supervision.

Possible Side Effects and Safety Advice

Niacin is generally well tolerated, but high doses of 250 mg can sometimes cause skin flushing, itching, or mild gastrointestinal discomfort. These effects are usually temporary and diminish with continued uses. If you have liver disease, peptic ulcers, or are taking medicines for blood pressure or cholesterol, consult a health care professional before uses. Keep out of reach of children.

Why Choose 21st Century Niacin?

21st Century Niacin tablets are carefully formulated to deliver a pure, high-quality supplement. They contain no sugar, salt, yeast, preservatives, or artificial flavours or colours. This makes them a clean option for those looking to support their health with a straightforward, no-additive supplement. Each pack provides 110 tablets, with two bottles offering a long-lasting supply.

Frequently Asked Questions

What is niacin flush?

Niacin flush is a temporary redness and warmth of the skin, often on the face and chest, that occurs shortly after taking a high-dose of nicotinic acid (the form of niacin in this product). It is not harmful and usually subsides within 30–60 minutes. Taking the tablet with food or using a sustained-release formula can help reduce this effect.

Can I take niacin on an empty stomach?

It is recommended to take niacin with food to minimise the likelihood of flushing and stomach upset. Food helps slow absorption, which can make the flush less intense.

Is this product suitable for vegans?

The product label does not explicitly state vegan status, but it contains no animal-derived ingredients such as sugar, salt, yeast, or preservatives. For dietary concerns, please consult the manufacturer or check the product packaging for allergen information.

How does niacin differ from niacinamide?

Niacin (nicotinic acid) and niacinamide (nicotinamide) are two forms of vitamin B3. The key difference is that niacin can cause a flushing sensation, while niacinamide does not. Both forms support energy metabolism and overall health, but niacin is often used for its potential to support healthy cholesterol levels, while niacinamide is preferred for non-flush supplementation.