How fiber supplements help reduce skin inflammation is mostly indirect: fiber feeds gut bacteria that make calming short chain fatty acids, helps steady the blood sugar spikes linked to acne, and prebiotic fiber cut eczema in infant trials. Keep your skin treatment, start with beans, oats and vegetables, and take psyllium with at least 8 ounces of liquid.
Do fiber supplements reduce inflammation? Only modestly: a 2022 review of 52 meta-analyses found fiber lowered TNF-alpha but not CRP, the marker most doctors check. Take psyllium or another fiber for digestion, cholesterol and blood sugar, and lean on a fiber-rich anti inflammatory diet for the rest.