The hyponatremia is caused by a relatively smaller loss in total body water. 1  any cause of hypovolemia such as prolonged vomiting, decreased oral intake, severe diarrhea. 2  diuretic use (due to the diuretic causing a volume depleted state and thence ADH release, and not a direct result of diuretic-induced urine sodium loss)
Biotin is safe but is not likely to do much to help your hair grow unless you are deficient in biotin, which is uncommon. A reasonable dose is 5 mg. However, you may get better results by taking a quality multivitamin, eating a healthy diet rich in organic fruits and vegetables, avoid junk food and getting adequate sleep.
Biotin deficiency is rare and low levels may result in brittle nails and hair loss, explains Dr. Stuart. However, hair loss and brittle nails may have multiple causes and taking biotin supplements may actually halt this process and even help to reverse it. The general daily recommended dosage of biotin is 2.5 mg (or 2,500 mcg), according to Dr. Scher. However, it's not clear what the correct dosage is for the full effect, but it's important to consult your doctor to avoid overdosing.