In 58 patients with fatty liver disease, the ones with the most niacin in their diet had the most favorable outcome, with a 37% reduction in liver fat after 9 months of lifestyle interventions, vs only 10% reduction in the patients eating the least niacin.
39 patients taking 2g/day extended release niacin for ~6 months had a ~40% reduction in liver fat. Other markers of inflammation such as CRP (C-reactive protein) where also reduced.
Most "niacin" products are niacinamide. If you want the form discussed in this research, look for nicotinic acid specifically.
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