Shed Defender's Allergy & Immune System Defense Soft Chews are the perfect way to boost your immune system and protect your body from allergies and other environmental threats. These delicious chews contain natural ingredients, including zinc, elderberry, and probiotics, that work together to help support your immune system and reduce inflammation. With 90 chews in each bottle, they make it easy to get the daily dose of immune-boosting nutrition you need.