Increase intake of D3 for many health benefits

Dr Somerville gives a clear explanation of the many benefits to human health and longevity when taking the optimal dose of D3. Each chapter ends with a recap and what amounts to be a medical journal article literature review in support of each beneficial chapter topic. The corroboration of the optimal dose is also given through patient testimonies from thousands he has treated. My favorite chapters concerned the benifits of the optimal dose for better sleep, weight loss and longevity. I like it that the doctor is sharing his wisdom and patient success stories. The optimal dose is much greater than what is normally taken. He makes a very strong case for increasing to the optimal dose! I am!