Niacinamide (Vitamin B3)

Niacinamide is the specific form of vitamin B3 that Ray Peat identified as a safe and effective metabolic therapy, in contrast to the inflammatory flush-inducing form, niacin. 2 Peat argued that niacinamide, taken in divided doses of 50–100 mg up to a total of 300 mg daily, can control symptoms of major degenerative problems including diabetes and arthritis by reducing inflammation, protecting nerves, and accelerating glucose oxidation. 1 He emphasized that the flushing caused by nicotinic acid is not a benign side effect but a sign of damage, as it releases serotonin, histamine, and toxic prostaglandins. 2 This mechanistic distinction is critical: the "no-flush" niacin sold as inositol hexanicotinate merely slows the release of the same damaging nicotinic acid, making niacinamide the only safe, widely available form. 1

The fundamental mechanism of niacinamide's protective effect is its role as a precursor to NAD+, a crucial cofactor for mitochondrial energy production. 2 Peat explained that by supporting efficient energy production, niacinamide lowers lactic acid and increases carbon dioxide, shifting the organism away from an inflammatory state. 1 Georgi Dinkov has extended this framework, detailing a dual mechanism where niacinamide not only boosts NAD+ to directly activate the metabolic regulator SIRT1, but also inhibits pathological signaling pathways, such as lowering the microRNA miR-93 which otherwise suppresses SIRT1 activity. 2 This energetic model explains niacinamide's ability to protect against a wide range of conditions rooted in energetic deficiency, from fatty liver disease to the prevention of miscarriages and birth defects, which Dinkov notes are driven by an energetic deficit in the mother rather than solely genetic factors. 2

A primary systemic effect of niacinamide is the potent inhibition of lipolysis, the release of free fatty acids into the bloodstream. 2 Dinkov has highlighted that a single dose of a niacinamide analog can cause a dramatic 75% drop in triglycerides, an effect mainstream medicine incorrectly attributes exclusively to the flush-inducing niacin via a specific receptor. 2 By suppressing the chronic release of free fatty acids, niacinamide improves insulin sensitivity and protects against the metabolic damage caused by circulating fats, a benefit Dinkov recommends supporting with vitamin E and aspirin during any fasting period. 3 This anti-lipolytic action is central to its role in improving biomarkers of cardiovascular disease and treating metabolic syndrome. 5

For therapeutic application, a daily dose of 300–500 mg of niacinamide is considered a safe and effective range for general health improvement, with Peat noting he has seen individuals cure terminal brain diseases with just 150–200 mg per day. 3 Dinkov has specified that 500 mg daily is likely the "sweet spot" for most people, as higher doses up to 1,200 mg may not provide additional benefit for general health and doses in the 750–1,000 mg range carry a risk of inducing anemia. 2 In severe conditions like ischemic heart disease, cancer, or Alzheimer's, higher doses may be justified due to the direct inhibition of fatty acid oxidation, but for general use, lower doses are preferable. 8 Dinkov has also suggested that combining a low dose of 200–300 mg of niacinamide with 1–2 mg of methylene blue can achieve similar or greater elevations in NAD+ while avoiding the risks of high-dose vitamin B3. 9 The curative potential of niacinamide is further underscored by a case study where 500 mg twice daily, combined with antiretroviral drugs, led to an HIV patient remaining virus-free for over five years, strongly suggesting niacinamide was the curative agent by forcing infected cells to shed their viral load. 7