Combining supplements will not normally interfere with the way they work and in some cases may be beneficial, for example vitamin C helps iron absorption. However, certain supplements may interact with each other.
You can—but it's probably not a good idea. For some supplements, optimal absorption can depend on the time of day taken. Not only that—taking certain vitamins, minerals, or other supplements together can also reduce absorption and may result in adverse interactions, which can be harmful to your health.
But routinely getting an overload of vitamins and minerals can hurt you. Too much vitamin C or zinc could cause nausea, diarrhea, and stomach cramps. Too much selenium could lead to hair loss, gastrointestinal upset, fatigue, and mild nerve damage.
B vitamins work together (such as in a B complex supplement that contains B12, folate, B6, etc.), so they can/should be taken together. Vitamin C and iron (C helps the body absorb more iron, from both foods and supplements) Vitamin K and calcium (both support skeletal and heart health)
Combining multiple supplements or taking higher-than-recommended doses can increase the risk that they can cause harm, said Kitchin. "You really can't get toxic doses of nutrients through food, but you can absolutely get toxic doses through supplements," Kitchin said.
Extra amounts of water-soluble vitamins are typically excreted. The fat-soluble vitamins A and D are the most likely to cause toxicity symptoms if you consume them in high amounts.
The short and simple answer is: Yes! Vitamins C and D are commonly found together in multivitamins. They have complementary effects, which means that taking them together can better support your health. They're particularly beneficial to the immune system.
Ask your doctor to perform blood tests to determine what vitamin and mineral deficiencies you may have, and to establish a baseline by which you can measure the benefits of your multivitamin. Be sure to schedule follow-up lab tests 30 days after you begin a new multivitamin regimen.
Spread them out
Unless you're taking a multivitamin, swallow your supplements throughout the day instead of all at once.
Mayo Clinic suggests aiming to leave at least one to two hours between vitamins. “I usually tell people to take them at a separate meal,” says Brissette. Also keep in mind that your body can only absorb 600 mg of calcium at a time—so if you're taking more, have one dose in the morning and one in the evening.
Together, zinc and vitamin D in adequate concentrations help maintain a healthy musculoskeletal system and beyond; however, deficiency in either of these nutrients can result in various disorders affecting almost all body systems. This brief article will focus on the role of zinc in vitamin D functions.
Any ingredient in a multiple vitamin supplement can be toxic in large amounts, but the most serious risk comes from iron or calcium. Additional risks are associated with large or toxic doses of calcium, vitamin D, and vitamin A.
Interactions. Possible interactions include: Aluminum. Taking vitamin D and aluminum-containing phosphate binders, which may be used to treat high serum phosphate levels in people with chronic kidney disease, might cause harmful levels of aluminum in people with kidney failure in the long term.
Magnesium assists in the activation of vitamin D, which helps regulate calcium and phosphate homeostasis to influence the growth and maintenance of bones. All of the enzymes that metabolize vitamin D seem to require magnesium, which acts as a cofactor in the enzymatic reactions in the liver and kidneys.
Vitamin C + Niacinamide
However, when you combine niacinamide with Vitamin C, they'll cancel each other out chemically, making both formulas ineffective on your skin. Niacinamide takes out all the good properties of Vitamin C and makes it into a substance that can cause redness and trigger breakouts.
Heat, light, exposure to air, cooking in water and alkalinity are all factors that can destroy vitamins.
Owing to their ability to accumulate in the body, fat-soluble vitamins have a higher potential for toxicity than do water-soluble vitamins. Iron-containing vitamins are the most toxic, especially in pediatric acute ingestions.
Vitamin D is the most potentially toxic of all vitamins. This is because excess vitamin D causes calcium to build up in the heart, blood vessels, lungs and what other organ that is made of soft tissue? 13.
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Interactions between your drugs. No interactions were found between Vitamin B12 and Vitamin D3.