Pure Immune System Food: Always Be Protected. 34 Extremely Potent Medicinal Mushroom Concentrates in 1 Easy to Take Powder! Did you feed your immune system today? Used in every human culture for 1000’s of years: medicinal mushrooms. Each species contains a unique array of polysaccharides (essential sugars) and novel compounds that strengthen the immune system. Tastes like instant exotic artisan coffee!