This is a common problem, one that is usually caused by a poor level of acid in the stomach, toxic in the gut, or a lack of production enzymes that assist with the breaking down process. There are other causes as well, although the above are the most common. Problems with the digestive tract can be improved quite a bit if you slowly increase your intake of nutrients. Exercise is also important to your diet and your health. Although supplements and vitamins will go a long way, exercise will do a lot for your body. If you exercise on a regular basis, and take the right supplements and vitamins with your diet, you ll notice that you have more energy and you feel better than you ever have in your life. If you happen to be pregnant, you should let your doctor know that you are interested in or taking calcium supplements, as that have been known to get into breast milk. Normally, anyone can take calcium supplements, although using them in high doses may cause different and adverse reactions. If you take calcium supplements in large doses, you may experience constipation, vomiting, nausea, a loss of appetite, a dry mouth, and a loss of appetite. This is carried through the bloodstream by molecules known as LDL (Low Density Lipoproteins). When the LDL is oxidized, it reacts to the cholesterol and a fat substance known as plaque begins to get deposited on the artery walls, which causes the blood flow to stop. Vitamin E will stop cholesterol from forming into plaque, which will allow the blood to flow properly. The vitamin is also useful for helping with sexual dysfunction as well. This can be great news for those who have problems with pleasing their mate. Also very effective with improving circulation, B3 niacin can also help to reduce cholesterol levels found in the blood. Even though vitamin B3 niacin is great as a stand alone supplement, it should also consumed with foods that contain protein, due to the fact that the body is able to convert the amino acid known as tryptophan into niacin. Although you should begin taking it immediately if you have a deficiency, the effects wouldn t be the same as they would be if you stayed up to date with the right amount on a daily basis. On the other hand, if you are getting too much vitamin A, you ll put yourself at risk for pain in your joints, abdomen, and your bones.