Vitamin D

Vitamin D is a key player in your overall health. The name is misleading — it isn’t actually a vitamin at all but a potent neuroregulatory steroidal hormone that influences nearly 3,000 of your 25,000 genes.
It literally turns on and off genes that can exacerbate — or prevent — many diseases.
Vitamin D has been shown to influence dozens of conditions, including:

Cancer
Autism
Diabetes 1 and 2
Cold and Flu
Septicemia
Eczema and Psoriasis
Muscle Pain
Osteoporosis
Pre-eclampsia
Asthma
Depression
Hypertension
Obesity
Multiple Sclerosis
Inflammatory Bowel Disease
Signs of aging
Insomnia
Cavities
Macular degeneration
Seizures
Cystic fibrosis
Alzheimer’s disease
Heart disease
Rheumatoid arthritis
Crohn’s disease
Tuberculosis
Dementia
Hearing Loss
Periodontal disease
Reduced C-section risk
Infertility
Migraines
Schizophrenia