Niacel 400 delivers a potent NAD+ boost through nicotinamide riboside, helping you unlock steadier energy and better cellular function for everyday life. The formula pairs nicotinamide riboside with betaine anhydrous to support methylation and smooth NR metabolism. Thorne's science led approach, NSF Certified for Sport and GMP manufacturing set the bar for purity and safety.

Available Sizes & Variants:

60 capsules - standard monthly supply for daily NAD+ support

Benefits & Features:

• Supports steady energy throughout the day.
• Nicotinamide riboside acts as a direct NAD+ precursor to fuel cellular energy.
• Betaine supports methylation and NR metabolism, helping your body utilise NR more efficiently for sustained energy, better mitochondrial function, and overall metabolic balance over time.
• NSF Certified for Sport and GMP manufacturing provide assurance of purity, identity and potency across every batch.
• Nicotinamide Riboside supplementation has been shown to raise NAD+ levels, support mitochondrial function, and boost cellular energy, contributing to healthier ageing when used consistently over time.

Thorne is renowned for science powered supplements and transparent sourcing. Niacel 400 sits in a lineage of quality, with GMP manufacturing, routine lot testing and NSF Certified for Sport. This NAD+ boosting formula draws on years of metabolic research and a commitment to allergen-free, rigorously tested products. As a nad supplement, it fits a health plan built around ageing and metabolic wellness. Thorne products are often featured in Mayo Clinic materials, reinforcing their reputation. Many customers also explore a vitamin d supplement or berberine to support overall wellbeing.

(other) Calcium Laurate, Hypromellose Capsule, Microcrystalline Cellulose, Silicon Dioxide.

• GTIN: 693749012085
• Manufacturer: Thorne
• Categories: Best SellersNew ArrivalsPopular Supplement BrandsSubscribe & Save ProductsThorne Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 1 capsule once or twice daily, or as directed by your healthcare practitioner. As a dietary supplement\, take one capsule per day with water.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Nicotinamide Riboside (NR)

Nicotinamide Riboside is a water soluble form of vitamin B3 that acts as a direct precursor to NAD+. It is a bioavailable nutrient used to support cellular energy and metabolism.

This form is used as a NAD+ precursor in vegetarian capsules and is intended to support cellular energy pathways and metabolic function. The formulation also includes Betaine Anhydrous to support NR metabolism, while remaining free from common allergens.

What Does Nicotinamide Riboside Do?

Nicotinamide Riboside helps maintain intracellular NAD+ levels, which are central to energy production and cellular maintenance. Scientific research suggests NR may support mitochondrial function and energy-related processes in humans.

Evidence indicates NR can be studied in relation to metabolism and cellular energy; NHS/EFSA‑aligned discussions recognise NAD+ pathways as part of normal cellular function and energy management.

Dr. Conze of Harvard University found that nicotinamide riboside increases intracellular NAD+ levels, supporting energy metabolism in human cells.

*This product is not intended to diagnose, treat, cure, or prevent any disease.

Welzo selects brand partners that demonstrate science-led quality, global safety compliance and transparency. Thorne is recognised as a leader in science-driven supplementation and is trusted by clinicians, athletes and institutions for its transparent ingredient sourcing and rigorous safety profile, with regular acknowledgement from reputable outlets like Mayo Clinic. This strong reputation, together with Thorne’s commitment to research-backed formulations, underpins our confidence in this partnership.

Our vetting criteria emphasise brand credibility, testing rigour and manufacturing standards. Thorne meets these through GMP-compliant production, routine lot testing and allergen-free certifications, alongside the NSF Certified for Sport® designation confirming batch purity and safety. For our team assessing suitability, this brand’s track record in targeted solutions for healthy ageing, performance and metabolic wellness aligns with our quality standards and dosing transparency, which you can explore with our supplement quality standards.

We chose Thorne for NiaCel because the brand combines industry standing with practical product purity and a clear fit for cellular energy support. This alignment was evaluated by our expert team of doctors, nurses, and nutritionists and mirrors ourValue-driven partnership approach.