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)
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.
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.
Magnesium and calcium/multivitamin
But if you do take magnesium, Erin Stokes, ND, recommends not taking it at the same time as your multivitamin, as it may interfere with the absorption of smaller minerals found in the multivitamin, like iron and zinc.
Yes! You can and should take magnesium and vitamin D together. In fact, the bioavailability of vitamin D largely relies on magnesium. Also, many nutrients wouldn't work efficiently without magnesium, further highlighting the importance of this mineral!
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.
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.
Cholestyramine -- This cholesterol-lowering medication, known as a bile acid sequestrant, interferes with the absorption of vitamin D (as well as other fat-soluble vitamins). Phenobarbital, phenytoin, and other anticonvulsant medications -- These medications may accelerate the body's use of vitamin D.
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.
"Adequate levels of magnesium in the body are essential for the absorption and metabolism not only of vitamin D but of calcium as well," Dean states. "Magnesium converts vitamin D into its active form so that it can help calcium absorption.
Neil Levin, a clinical nutritionist at NOW Foods, agrees that morning is best for multivitamins and any B vitamins. “Multivitamins tend to do best when taken earlier in the day, as the B vitamins in them might stimulate metabolism and brain function too much for a relaxing evening or before bed,” Levin says.
The micronutrient combination (DMB) comprises daily doses of 1,000 IU vitamin D, 150mg magnesium, and 500mcg vitamin B12, for up to 14 days. “Patients who received DMB had a significant reduction of clinical deterioration compared to patients without DMB.
If you're looking to get more vitamin D in your diet, take it with a side of magnesium. That mineral appears to help regulate levels of vitamin D, which in turn manages the levels of other minerals such as calcium and phosphorus.
Therefore, magnesium supplements can be taken at any time of the day, as long as you're able to take them consistently. For some, taking supplements first thing in the morning may be easiest, while others may find that taking them with dinner or just before bed works well for them.
Other experts caution against taking magnesium at the same time as other minerals. “It can interfere with absorption of other minerals, so if you take a multivitamin, calcium or zinc, take magnesium at a different time of day,” Cooperman warns.
Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs) interacts with MAGNESIUM. Magnesium might slow blood clotting. Taking magnesium along with medications that also slow clotting might increase the chances of bruising and bleeding.
No interactions were found between Fish Oil and magnesium oxide. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.
In particular, vitamins B6, B12, C, D, and E can improve or lower your sleep quality and duration. Vitamin C deficiency and both lack and an excess of vitamin B6 in the body might affect your sleep or cause insomnia. It is important, therefore, that you consult your doctor before taking any vitamin supplements.
The eight B vitamins (thiamin, riboflavin, niacin, pantothenic acid, B6, biotin, folate and B12) provide the most energy, as they aid in cell metabolism, help the body transform carbohydrates and fats into energy and carry energy-nutrients around the body.
B vitamins shouldn't be taken in the evenings as they work in the body to convert food into energy. Therefore, taking them close to bedtime can disturb or inhibit sleep. They are also water soluble, which means they can be taken without food, or dietary fat, and be as easily absorbed."