Stay on the healthy side with Natural Defense and give your body the support it needs all year round!* About Natural Defense Pure Health"s Natural Defense is a blend of nutrients your body needs in one easy-to-swallow vegetable capsule that is free of binders and excipients. Natural Defense contains vitamin C, Selenium and Immuno-LP20, an immunobiotic compound of heat-treated Lactobacillus plantarum L-137. These days, it takes more than an apple a day to keep the doctor away!