Vitamin D is an essential part of your immune-strengthening toolkit. In the winter months, when you don’t produce as much vitamin D naturally, it can take a toll on your immune function.
When it comes to immune-boosting supplements, vitamin D is another big contender. Thorne’s vitamin D supplement contains vitamin D3, which the body may absorb better than vitamin D2. The NSF Certified for Sport supplement contains a potent 5,000 IU of high-quality vitamin D to promote immune function and healthy teeth and bones.