What vitamins cannot be taken at the same time?

These are the supplements that don't go together or don't go with food, magnesium and calcium.

Vitamin

D, vitamin K2, and other fat-soluble vitamins. As stated above, with the above combination of iron and calcium, calcium will compete for absorption with other minerals. Since calcium can affect the way the body absorbs iron, it can also affect the absorption of zinc and magnesium.

While it's okay to take them together in a multivitamin complex (which usually contains smaller doses of these minerals), it's best to space out these supplements if you take them separately. While taking a dietary supplement is beneficial for many people, there are some vitamins that should not be taken together and some medical conditions where people should avoid taking certain vitamins or minerals. To ensure that your dietary supplement isn't doing more harm than good, we've put together a list of vitamins that shouldn't be taken together as a result of potential interactions with other nutrients or medical conditions. You've probably heard of the importance of calcium and vitamin D in promoting strong bones and teeth.

Calcium is an important mineral that also supports heart health. Approximately 40 percent of the U.S. population is deficient in vitamin D, which plays an important role in calcium absorption. Without an adequate supply of vitamin D, the body cannot absorb and use calcium properly.

Calcium and iron are two important minerals that the body needs to function properly. Iron is essential for red blood cell production, while calcium is essential for strong bones and teeth and a healthy heart. People who are iron deficient may experience a condition called iron deficiency anemia, whose symptoms often include extreme fatigue, weakness, and lethargy. Increasing your intake of iron-rich foods, such as beef, dark green leafy vegetables, lentils, beans, and nuts, is usually enough to improve iron levels, but some people may also need to take an iron supplement.

However, people who take calcium supplements should know when to take them. The National Institutes of Health found that the body may not be able to absorb iron effectively when an iron supplement is taken in combination with a calcium supplement. To avoid this problem, it is recommended that people taking both supplements take them several hours apart. Pregnant women who get too much vitamin A can experience serious birth defects, so it's recommended that women of child-bearing age avoid taking multivitamins or other supplements that contain vitamin A.

Vitamin B3 is often recommended for use with cholesterol medications, especially simvastatin, to help increase levels of high-density lipoprotein (HDL), or “good cholesterol.”.

Water-soluble vitamins

, including the B family of vitamins and vitamin C, are found in the body's water-based tissues and must be taken with water and food. People who have a vitamin K deficiency may have difficulty getting their blood to clot properly and quickly, and are considered to be at risk of bleeding. Vitamin E has been found to counteract the effects of vitamin K and, when taken in especially high doses, vitamin E can thin the blood and affect the body's ability to properly clot blood.

These foods are so rich in vitamin A that, even if you don't take a vitamin A supplement, you should only eat them once a week to avoid consuming too much. As a quick refresher, your body needs 13 essential vitamins for normal cell function, growth, development, and overall optimal health. The body does not store water-soluble vitamins, including those in the B vitamin family and vitamin C, and the “leftovers” leave the body in the urine. Another article did not find a correlation between the combined intake of calcium and vitamin D and an increased risk of stroke.

According to recent research, “the prevalence of inadequate intakes of nutrients that support the immune system (vitamins A, C, D, and E) remains substantial, and some are higher (vitamins C, D, and zinc) than previously reported. Most people get enough vitamin A through their diets, as it's found in many different foods, so supplementation isn't usually necessary. People with certain gastrointestinal disorders or those who have undergone weight-loss surgery are also considered to be at greater risk of vitamin B12 deficiency. Because of this, fat-soluble vitamins are more easily absorbed in the presence of fat in the diet, so avoid taking them on an empty stomach.

B vitamins play unique and important roles, such as converting food into energy, maintaining healthy cells and tissues in the body, and helping to form new blood cells. However, if you take more than one supplement, you may wonder, “What vitamins shouldn't be taken together? On the other hand, you will also ask yourself: “What vitamins can I take together?. Vitamin B3, also known as niacin, is generally considered a safe supplement to take in combination with other vitamins and minerals, and many multivitamins include vitamin B3.