Although there are well over 100 antibiotics, the majority come from only a few types of drugs. These are the main classes of antibiotics. Penicillins such as penicillin and amoxicillin. Cephalosporins such as cephalexin (Keflex) Macrolides such as erythromycin (E-Mycin), clarithromycin (Biaxin), and azithromycin (Zithromax)
The endogenous serum metabolite of vitamin D (calcitriol, 1,25(OH)2 D3) is considered a true steroid hormone (D hormone), and like glucocorticoids (GCs) and gonadal hormones, may exert several immunomodulatory activities.itamin D, steroid hormones, and autoimmunity. Cutolo M(1), Paolino S, Sulli A, Smith V, Pizzorni C, Seriolo B. Author information: (1)Research Laboratories and Academic Division of Clinical Rheumatology, Department of Internal Medicine, University of Genova, Genova, Italy.
Vitamin D is the name given to a group of fat-soluble prohormones (substances that usually have little hormonal activity by themselves but that the body can turn into hormones). Vitamin D helps the body use calcium and phosphorus to make strong bones and teeth. Skin exposed to sunshine can make vitamin D, and vitamin D can also be obtained from certain foods. Vitamin D deficiency can cause a weakening of the bones that is called rickets in children and osteomalacia in adults. Two major forms of vitamin D that are important to humans are vitamin D2, or ergocalciferol, and vitamin D3, or cholecalciferol.