I feel very fortunate to have found Optimal Bio.The whole staff including Dr Brannon are very professional , friendly and welcoming.The reason I started with Optmal Bio was because of my osteoporosis . Not only have I increased my bone density but sleep, sex and energy are all good again.Also Dr. Brannon recommended I take vitamin D with K vitamin C and zinc . When COVID-19 came along it is found out that vitamin D with K vitamin C and zinc are defenses against viruses.I had 6 months before cOVID-19 came to build my immune system to the optimal thanks to Dr. Brannon.