💊 What it does
Beta-glucans are polysaccharide fibres found in the cell walls of oats, barley, mushrooms, and yeast. Different sources have different properties: oat and barley beta-glucans have FDA-approved health claims for reducing LDL cholesterol (at 3 g/day) and are classified as soluble fibre. Mushroom beta-glucans (from shiitake, maitake, reishi, turkey tail) act as biological response modifiers — they activate innate immune cells (macrophages, NK cells, dendritic cells) and have been used in Japan and Korea as adjunctive cancer treatments. These two applications are distinct and should not be confused.
👤 Who needs it
People with elevated LDL cholesterol (oat/barley beta-glucan). Those wanting immune support (mushroom beta-glucan). Cancer patients using mushroom beta-glucan as adjunctive support alongside conventional treatment (under oncologist supervision). People with respiratory infections or wanting immune resilience.
🥦 Food sources first
Oat beta-glucan: porridge oats, oat bran, barley. 3 g/day of oat beta-glucan from food (approximately 70g dry oats) provides the cholesterol-lowering effect. Mushroom beta-glucan: shiitake, maitake, reishi, oyster mushrooms — cooking activates the beta-glucans.
🗓 When to supplement
For cholesterol management: oat/barley beta-glucan at 3 g/day — achievable from food. For immune support: mushroom beta-glucan supplement. For cancer adjunctive support: mushroom beta-glucan under oncologist guidance.
🏷 Best form to look for
Specify source based on application: oat beta-glucan for cholesterol, mushroom beta-glucan for immune. Standardised to beta-glucan content.
⏰ When to take it
With meals for cholesterol-lowering application. Consistent daily use.