Discount brokerages require a minimum age of 18. However, you can create a sub-account under your dads name (as long as he signs some sort of consent form) and these sub-accounts don't have a minimum age requirement.
Vitamin D deficiency rickets can be caused by a lack of vitamin D in the diet, a lack of exposure to the sun, or malabsorption syndromes in which there is an inability of the intestines to adequately absorb nutrients from foods.
More serious diseases linked to vitamin D deficiency include: 1  Osteoporosis. 2  Heart disease. 3  Autoimmune diseases. 4  Periodontal disease. 5  Gout. 6  Diabetes. 7  Obesity. 8  Psoriasis. 9  Neurological diseases.