Can I take BCAA with Vitamin B12?

Understanding the interactions, benefits, and safety of combining these two powerful supplements.

BCAA
+
Vitamin B12

Short answer

We found no documented interaction between BCAAs and Vitamin B12 in the sources below. That isn't proof the combination is right for you: check each one's cautions, and ask your pharmacist if you take medication.

BCAAs (branched-chain amino acids)

What it is: Leucine, isoleucine and valine: amino acids from protein foods that muscles can use for energy.

What the research says: There's little evidence they help endurance. With weight training they might help muscle, but it isn't clear they do more than eating enough protein.

Cautions

  • A diet with enough protein already gives 10 to 20 g a day; up to another 20 g a day from supplements seems safe.

In Holitro: BCAA (600 mg per capsule)

Source: NIH Office of Dietary Supplements: Dietary Supplements for Exercise and Athletic Performance (updated March 2021)

Vitamin B12

What it is: A vitamin that keeps blood and nerve cells healthy and helps make DNA.

What the research says: B12 prevents a type of anemia that makes people tired and weak. People who take metformin or long-term acid reducers may absorb less of it.

Cautions

  • It hasn't been shown to cause harm, even at high doses.

Medicines to check

  • Metformin and acid-reducing medicines can lower B12 levels (the medicine affects the vitamin, not the other way round)

In Holitro: Vitamin B12 (1000 mcg per capsule)

Source: NIH Office of Dietary Supplements: Vitamin B12: Fact Sheet for Consumers (updated December 2023)

Check with your doctor or pharmacist, especially if you take medication.

Check your stack β€” free

Educational information only, not medical advice. This reflects general ingredient overlap, not a personalized safety review. Always check with your doctor or pharmacist before combining supplements, especially if you take medication, are pregnant or nursing, or manage a health condition. These statements have not been evaluated by the FDA.

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