Which two vitamins should not be taken together?

Author: Ike Feil  |  Last update: Thursday, May 1, 2025

Which Vitamins Shouldn't be Taken Together?
  • Iron and calcium – these compete for absorption and don't work well together. ...
  • Iron and zinc – these compete for absorption and don't work well together. ...
  • Iron and vitamin D – taking vitamin D can potentially decrease your iron levels.

What vitamins should you not take at night?

6 supplements you should not take at night!
  • Vitamins B.
  • Multivitamins and energy herbs.
  • Vitamin D.
  • Calcium.
  • Vitamin C.
  • Zinc.

Can I take all my vitamins at once?

It's generally okay to take all of your daily vitamins at once, as long as you are not taking more than the recommended daily dose for each vitamin. However, the absorption and utilization of vitamins can vary depending on the type of vitamin and the presence of other substances in your digestive tract.

Are there any vitamins that you cannot take together?

Some vitamins that should not be taken together, or have dosage limitations, include vitamin C with vitamin B-12, vitamin A supplement with vitamin A-rich foods, folic acid (vitamin B9) and vitamin B12, and vitamin E with vitamin K.

What vitamins should you not take with B12?

If you supplement vitamin C and B12, you probably do not take them at the same time, as vitamin C may reduce the intake of B12.

10 Vitamins You Should Never Take Together | Dr. Janine

What cancels out B12?

Taking certain medications: Certain medications can cause low levels of vitamin B12 in your body, including metformin (a drug used to manage diabetes), proton pump inhibitors (PPIs are used to treat GERD and peptic ulcers), histamine H2 blockers (a medicine used to reduce the amount of acid your stomach makes) and oral ...

Can I take B12 and vitamin D together?

Yes, you can take vitamin D and B12 together safely, as they serve different essential functions in your body. Combining these vitamins can support energy production, bone health, and overall well-being, making them a powerful addition to your daily health routine.

What vitamins should you not mix with vitamin D?

Iron and vitamin D – taking vitamin D can potentially decrease your iron levels. Take them at different times, morning and evening, for best efficacy. Vitamin E and vitamin K, fish oils/omega-3 – as these vitamins may impact blood vessel health in those on certain medications.

Why avoid taking vitamin C at night?

Unlike fat-soluble vitamins, it doesn't require food or specific timing to work effectively. However, some people may want to avoid taking it before bed: If you have acid reflux or a sensitive stomach – Vitamin C, especially in high doses, can increase stomach acidity, and lead to mild heartburn or nausea.

Is it okay to take 1000 mcg of B12 a day?

Even the lowest doses in B12 supplements are many times the recommended dietary allowance. Doses up to 1,000 mcg, though unnecessary, aren't harmful. Fortified foods. Many breakfast cereals, soy products, and yeasts are fortified with B12.

Which two vitamins pose the greatest risk of toxicity?

Fat-soluble vitamins (like A, D, E, and K) don't get flushed out in the urine, so they're the most likely to cause vitamin toxicity. Vitamins A and E may pose the greatest risk of toxicity, since they are so commonly taken and readily available.

What are the best vitamins to take daily?

Depending on your individual needs, some supplements to consider taking daily include a multivitamin/mineral supplements, and/or vitamins A, D, E, K, and C, the B vitamins, as well as iron, magnesium, zinc, and calcium. Other dietary supplements to consider taking include omega-3 fatty acids, probiotics, and fiber.

What are the symptoms of too many vitamins?

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.

What vitamin should not be taken in the morning?

Bottom Line. The body stores fat-soluble vitamins—including Vitamins A, D, E, and K—and they're absorbed more easily in the presence of dietary fat, so avoid taking them on an empty stomach. Take them with a meal or snack that includes a healthy fat.

Can I take 5 different vitamins at once?

Combining multiple supplements or taking more than the recommended dose might raise the risk that they can cause harm, said Kitchin. To lower your risk of an overdose, try looking for a multivitamin with no more than 100% of the daily value for any one nutrient to avoid an overdose, said Kitchin.

What does zinc do for the body?

Zinc, a nutrient found throughout your body, helps your immune system and metabolism function. Zinc is also important to wound healing and your sense of taste and smell. With a varied diet, your body usually gets enough zinc. Food sources of zinc include chicken, red meat and fortified breakfast cereals.

What vitamins make you sleepy?

For example, vitamins B6 and B12 play a key role in energy metabolism. However, taking large doses of these vitamins can also cause fatigue and other symptoms such as headaches, diarrhea, and nausea. Other vitamins that have been linked to fatigue include vitamin C and iron.

Is 1000mg of vitamin C too much?

If you're an adult, limit yourself to no more than 2,000 milligrams (mg) of vitamin C a day. The recommended upper limit for children varies by age.

Which vitamin is good for skin?

There is evidence that vitamin A, vitamin B complex, vitamin C, vitamin D, vitamin E, biotin, and the minerals chromium, iron, selenium, and zinc play important roles in maintaining skin heath. Additional supplementation may be helpful for specific skin conditions.

What cancels out vitamin D?

There are a few reasons why people can have trouble absorbing vitamin D. Some factors that may reduce or block its absorption include: Conditions such as celiac disease, chronic pancreatitis, Crohn's disease, and cystic fibrosis.

What vitamin is good for hair growth?

“Biotin is essential for hair and nail growth; biotin deficiency, in fact, can lead to hair loss and brittle nails,” says Carmen Castilla, MD, a board-certified dermatologist based in New York City.

What vitamins should not be taken with blood pressure medicine?

Examples of herbal supplements that may affect your blood pressure or blood pressure medicines include:
  • Arnica (Arnica montana).
  • Ephedra (ma-huang).
  • Ginseng (Panax quinquefolius, Panax ginseng).
  • Guarana (Paullinia cupana).
  • Licorice (Glycyrrhiza glabra).

What to avoid when taking D3?

If you are currently being treated with any of the following medications, you should not use vitamin D supplements without first talking to your health care provider.
  • Atorvastatin (Lipitor). ...
  • Calcipotriene (Dovonex). ...
  • Calcium channel blockers. ...
  • Corticosteroids (prednisone). ...
  • Digoxin (Lanoxin).

What can you not mix B12 with?

Possible interactions include:
  • Aminosalicylic acid (Paser). Taking this drug used to treat digestive problems might reduce your body's ability to absorb vitamin B-12.
  • Colchicine (Colcrys, Mitigare, Gloperba). ...
  • Metformin (Glumetza, Fortamet, others). ...
  • Proton pump inhibitors. ...
  • Vitamin C (ascorbic acid) supplements.

What vitamins should not be taken with magnesium?

Don't use calcium, zinc, or magnesium supplements at the same time. Also, these three minerals are easier on your tummy when you take them with food, so if your doctor recommends them, have them at different meals or snacks.

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