 is this vitamin D deficiency that's out there is causing an avalanche of health problems for 70% of our population, ranging from pain, loss of balance, muscle weakness, depression, increased blood pressure, arthritis, memory loss, and even a compromised immune system. And I have Dr. Michael Pincus with me today to talk about the most effective way to get vitamin D. Dr. Pincus, it's good to talk to you again.