Can I take BCAA with Theanine?

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

BCAA
+
Theanine

Short answer

We found no documented interaction between BCAAs and L-theanine 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)

L-theanine

What it is: An amino acid found in green tea, taken for calm and sleep.

What the research says: Small studies suggest it may improve sleep; results for anxiety are mixed.

Cautions

  • No side effects have been reported for the supplement.
  • It may not be safe in pregnancy or while breastfeeding.

Medicines to check

  • Sleep medicines and sedatives (such as lorazepam, diazepam or zolpidem): may add to drowsiness

In Holitro: Theanine 200mg (200 mg per capsule)

Source: Memorial Sloan Kettering Cancer Center, About Herbs: L-Theanine (updated July 2026)

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

Check your stack — 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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Balancing dosages across multiple different bottles is risky, inefficient, and expensive. Theanine is already lab-dosed and delivered daily in our Sleep Pack — one less bottle to manage.

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