Looked into how niacin and nicotinamide cross blood brain barrier in control, Huntington & Alzheimer patients. Nicotinamide had higher uptake in brain tissue than niacin. No statistical difference in concentrations across the groups. It was observed that niacin and nicotinamide concentrated in red blood cells vs plasma over time.
Most "niacin" products are niacinamide. If you want the form discussed in this research, look for nicotinic acid specifically.
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Shop PureBulk →Pure nicotinic acid powder. No fillers, flexible dosing. This is the form studied in the GPR109A and lipid metabolism literature — not niacinamide.
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