USDA Organic Immune Support Herbal Supplement. Certified Organic by Oregon Tilth. 1:3 Herb Strength Ratio, 333 mg/mL Herb Equivalency. Traditionally used for supporting immune defenses so you can stay feeling your best. This USDA Organic supplement offers immune support and is certified organic by Oregon Tilth. It features a 1:3 herb strength ratio and 333 mg/mL herb equivalency, making it a potent choice for maintaining your well-being.