There are several causes of anaemia - most commonly due to iron deficiency, Vitamin B12 deficiency, defective hemoglobins, chronic illnesses, blood loss, some medications, bone marrow disorders, absorption disorders of stomach or intestines.
To find out the cause of anaemia, you need to take a few blood tests, usually clubbed in a panel.
It is not wise to start self medication for anaemia without finding out its real cause.

SGPT is the parameter to watch in case of liver damage.
Common causes of liver damage include alcohol, drug abuse, smoking, and obesity. Making lifestyle changes at an early stage can cause reversal of damage.

There are several tests to detect kidney damage, but the most sensitive parameter is Creatinine.
High Creatinine levels are seen in High Blood Pressure, High Blood Sugar, Frequent use of Pain Killers, Too much intake of Protein, Salt or Sodas.

3 out of 4 Indians are Vitamin D deficient as per recent survey. Once we find out our low Vitamin D level, and start supplementation, the levels increase gradually over a period of 4 - 8 weeks to normal. However, the levels keep falling again unless we keep taking a maintenance dose of Vitamin D.
As such, we must measure our Vitamin D every 6 months to keep healthy muscles and bones.
It is important to note that you must take Vitamin D blood test 48 hrs before your next due dose.