Manufacturers of vitamins for weight loss use extremely high levels in their products, promising that customers who purchase these 'mega vitamins' will lose weight. These increased levels of nutrients can result in accidental poisoning.
Be wary when choosing vitamins that promise to help you lose weight; be sure to read all labels for the percent of RDA the vitamin provides. Keep in mind that fat-soluble vitamins such as A, E, D and K are a risky bet as they last longer in the body, while water-soluble vitamins such as C and the vitamin B group are more easily flushed out of the body by the excretory system.
Vitamin A helps cell development and is beneficial for the skin, but ingesting too much of it results in hypervitaminosis A. This condition can cause headaches, vision problems, nausea, a loss of appetite and irregular menstrual periods, and in severe cases liver damage.
According to VitaminLab.com, the B vitamins work together to 'bolster metabolism,' making them a popular addition to many vitamin weight loss supplements. But be careful when relying on vitamin B6 to lose weight; an overdose can cause nerve damage, resulting in a numbing sensation in the mouth and extremities. One popular over the counter multi-vitamin contains over 500 percent of your RDA!
Vitamin C doesn't only boost the immune system and foster good health, but its ability to help restore collagen and elasticity to the skin makes it a choice. Taking too much of it can lead to diarrhea, kidney stones and nausea, though more serious side effects are rare.
Vitamin D, found in milk and sunshine (more specifically, is created when sunlight hits and chemically reacts with the skin) can have a deleterious effect on the levels of calcium in your blood. Too much calcium can lead to build-ups of mineral deposits as well as nausea, kidney stones and muscle problems.
Vitamin E is purported to prevent a host of serious medical conditions including heart disease and cataracts. It's ability to prevent premature aging and stretching of the skin makes it common for inclusion in vitamin supplements but be careful, for too much vitamin E can lead to stomach pain and interfere with the body's ability to absorb other fat soluble vitamins.