PatchMD D3/K2 Topical Patch (30-Day Supply) May promote a Healthy Immune System May Help Aid in the Absorption of Calcium May Reduce Risk of Peripheral Artery Disease (PAD) D3/K2 Access Without Sunlight Exposure Safe, Easy and Convenient to Use Our bodies manufacture Vitamin D when the skin is exposed to UV radiation from sunlight, but the ability to do so decreases as we age. D3/K2 maintains healthy calcium and phosphorus levels in the body for strong bones; it increases muscle strength in older adults; and it also plays an active role in a healthy immune response.* How To Use Apply patch daily to an area with little or no hair, i.e., shoulder, back or hip. For best results, it is recommended to wear PatchMD patches for 8 hours. There is no additional benefit wearing the patch longer than 8 hours. Patches can be worn during sleep. Avoid using any lotion or cream in the same area as it will inhibit absorption. Patch is not waterproof. It is ok to wear multiple patches at a time.