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(More customer reviews)Please do not believe unquestioningly the opinion of anyone, including your doctor, without doing your own research. You can get lots of information on just about anything by performing a simple web search.
Most people are seriously deficient in vitamin D3 (cholecalciferol) which is different than vitamin D2 (ergocalciferol), the form that is most often added to milk and other foods.
The RDA is what you need as a minimum to prevent obvious disease symptoms, it has nothing to do with optimal dosages! It is rather like the difference between a person who is physically able to perform ordinary daily activities versus a professional athlete. Also, the RDA recommendations change as new information is discovered- it is not perfect and never will be because people are not identical in their genetics or their environment. Whereas one person may do okay on 200 IU of vitamin D3 per day, others may need 8000 IU per day. All the research I have found indicates that signs of overdose toxicity has only been found in people taking more than 10,000 IU per day over an extended period of time. From my own personal research, I take 4000 IU daily in addtion to whatever I get naturally from sunlight.
If you really want to know what vitamins and mineral supplements you should be taking, ask your doctor for a complete blood assay to evaluate the current levels. Ask for a copy of the records and do some research on your own to confirm whether or not your doctor's opinion on what levels are adequate is good enough for you. (After supplementing for a while you will need to get another assay done to make sure that your dosages are actually raising any deficiencies to the desired levels.)
Remember, adequate does not equal optimal! Normal does not equal optimal either... in the U.S. most people are significantly overweight which makes them normal (normal by definition is the average in a population), but I think that most people would agree that it is NOT optimal.
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