Comparison guide
Which vitamin B3 should you take?
The three forms of B3 behave very differently. Nicotinic acid moves cholesterol numbers but causes flushing and, at gram doses, real harm; niacinamide does not flush but has none of niacin's lipid effects; and 'flush-free' inositol hexanicotinate avoids the flush because it barely releases niacin at all.
The options, compared
| Option | Evidence | Best for | The honest note | |
|---|---|---|---|---|
| Vitamin B3 (Niacin) | Limited evidence | Lipid therapy under medical supervision | Raises HDL and lowers triglycerides, but two large trials showed no fewer cardiovascular events on top of statins, plus excess diabetes, infections and bleeding. | View |
| Niacinamide | Moderate evidence | Most people wanting the vitamin | Does not flush, and in one trial 500 mg twice daily cut new non-melanoma skin cancers by 23% in high-risk immunocompetent adults, but it does nothing for cholesterol. | View |
| Inositol Hexanicotinate (Flush-Free Niacin) | Limited evidence | Not worth buying | At 1500 mg/day it was indistinguishable from placebo on cholesterol; the missing flush is a marker of the missing drug effect. | View |
Our verdict
If you simply want vitamin B3, niacinamide is the default because it does not cause flushing. Nicotinic acid (immediate-release or prescription extended-release) is the only form with lipid trial data, but it is no longer recommended as add-on therapy to statins, and gram doses belong under medical supervision. Skip inositol hexanicotinate: it does not deliver niacin's effects.