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| Form | Bioavailability | Best For |
|---|---|---|
| Nicotinic Acid (Niacin) | High | Cholesterol management — the only form that significantly raises HDL; causes flushing |
| Niacinamide (Nicotinamide) | High | Skin health and general use — no flushing, does not affect cholesterol |
| Nicotinamide Riboside (NR) | High | NAD+ boosting and longevity research — efficient NAD+ precursor |
| Inositol Hexanicotinate (Flush-Free Niacin) | Low | Those wanting to avoid flushing — minimal evidence for cholesterol benefits |
Bioavailability: High. Best for: Cholesterol management — the only form that significantly raises HDL; causes flushing.
Bioavailability: High. Best for: Skin health and general use — no flushing, does not affect cholesterol.
Bioavailability: High. Best for: NAD+ boosting and longevity research — efficient NAD+ precursor.
Bioavailability: Low. Best for: Those wanting to avoid flushing — minimal evidence for cholesterol benefits.