But it wasn't water-soluble, meaning it couldn't be absorbed by the body and would never be effective as a drug. 1  A drug candidate molecule must pass many hurdles to earn the description good medicine.. It must have the best possible activity, solubility, bioavailability, half-life, and metabolic profile.
Vitamin C, or ascorbic acid, may also help protect and strengthen joints by preventing free radical damage to cells. The vitamin also helps form the protein in tendons, ligaments and other tissues. You can get vitamin C in fruit -- especially oranges and grapefruits -- and many vegetables.Vitamin D, which is found in fatty fish, mushrooms, and fortified dairy products, is also made in your skin in the presence of sunlight.everal vitamins and minerals have been studied for their protective effects on the joints. They include copper, selenium and vitamins C and D.
Getting enough vitamin D proves essential for the health of your bones. Vitamin D helps your body regulate calcium, controlling the localization of calcium in your tissues so that your bones can retain the calcium they need to stay strong.itamin K. Vitamin K activates proteins you need for healthy bones. It activates osteocalin and protein S, two proteins your osteoblasts need to deposit new bone tissue. Vitamin K also promotes the activity of matrix Gla protein, a protein found in cartilage and bone that facilitates bone mineralization.