Why flushing happens

Flushing occurs when niacin triggers the release of prostaglandins, which dilate small blood vessels near the skin. It typically appears as warming and reddening of the skin, usually starting in the face and chest. It is usually harmless and temporary, but can feel uncomfortable, especially at higher doses.

Flushing vs. non-flushing niacin

Flushing niacin (immediate-release nicotinic acid) causes the temporary warming and reddening described above. Non-flushing or "no-flush" niacin products typically use a different compound, such as inositol hexanicotinate, that does not produce this effect — but may also not produce the same metabolic effects Stephen's research focuses on.

Practical flushing-management guidance

Educational strategies Stephen discusses include starting with a lower dose and increasing gradually, taking niacin with food, staying well hydrated, and being consistent with timing. Dose, timing, food, hydration, and any interactions with existing medications should always be reviewed with a healthcare provider before starting.

For a specific, step-by-step schedule, see the No-Fail Niacin Titration page.

Known risks

Niacin can interact with medications, affect liver enzymes and blood sugar, and is not appropriate for everyone. Anyone considering niacin, especially with existing kidney, liver, or metabolic conditions, should speak with a qualified healthcare professional first and use appropriate lab monitoring.