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.
Specific symptoms related to vitamin D deficiency include: 1  Muscle weakness. 2  Joint aches and discomfort. 3  High blood pressure. 4  Inability to concentrate or focus. 5  Urinary incontinence, bladder issues. 6  Constipation. 7  Headaches. 8  Cold/flu, immune system decline. 9  Mood disorders.