We lead busy and stressful lives and rarely eat as we should. We also eat a diet that is far from natural and is highly processed that may be very deficient in essential vitamins and minerals. Because of this, many people resort to supplements and vitamin pills to make up for missing nutrients, but there is some risk in supplementing. Supplements can be great for replacing nutrients that were processed away, but too much of some of them may be toxic. Since the liver filters out toxins from the blood, it is important to assess its health and function. One indicator of this is the LSI, or liver somatic index, test. Blood constantly flows through the liver and excess toxins put strain on it, as can excesses of certain supplements. Doing an LSI once in awhile helps make sure all is well with the liver. We know we cannot be healthy unless our liver is doing well. It must be able to do the job of disposing of toxins in the blood for us to be well. An example of the problem can be seen in persons who have abused alcohol and damaged their livers. Too much alcohol means a liver that simply cannot do its filtering and other jobs. Your doctor is your best source of information about which vitamins and other supplements you need to take. This way you do not end up with toxic overdoses or spend a fortune on things you really do not need. Blood tests can determine nutrient levels. Certain medications may even interact with vitamins so expert medical advice is really important. Whatever laboratory tests are needed can tell whether there is a cause for concern. The doctor will help you decide exactly which supplements you should or should not take.