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L-Theanine Interactions

Everything we know about how L-Theanine interacts with other vitamins, minerals, herbs, and supplements. 85 pairings covered — click any one for the full safety, timing, and dosage breakdown.

0 Antagonistic 2 Synergistic 83 Neutral Amino Acids And Proteins
Reviewed by Caroline M. Medical reviewer: Various Sources Data last reviewed: September 8, 2026
02

Synergistic — Better together

These pairings support each other's effects or absorption. Often bundled in the same multivitamin or stack.

L-Theanine  & Green Tea Extract → L-Theanine  & Vitamin B6 →
03

Neutral — Safe to combine

No significant interaction. You can take them together with no timing or spacing concern.

L-Theanine  & 5 Htp → L-Theanine  & Algae Oil → L-Theanine  & Aloe Vera → L-Theanine  & Alpha Lipoic Acid → L-Theanine  & Apple Cider Vinegar → L-Theanine  & Ashwagandha → L-Theanine  & Astaxanthin → L-Theanine  & Bcaas → L-Theanine  & Betaine → L-Theanine  & Boswellia → L-Theanine  & Calcium → L-Theanine  & Cbd → L-Theanine  & Chamomile → L-Theanine  & Choline → L-Theanine  & Chondroitin → L-Theanine  & Chromium → L-Theanine  & Cod Liver Oil → L-Theanine  & Collagen → L-Theanine  & Copper → L-Theanine  & COQ10 → L-Theanine  & Cordyceps → L-Theanine  & Creatine → L-Theanine  & D Ribose → L-Theanine  & Digestive Enzymes → L-Theanine  & Echinacea → L-Theanine  & Elderberry → L-Theanine  & Evening Primrose Oil → L-Theanine  & Fish Oil → L-Theanine  & Flaxseed Oil → L-Theanine  & Fucoxanthin → L-Theanine  & Garlic → L-Theanine  & Ginger → L-Theanine  & Ginkgo → L-Theanine  & Ginseng → L-Theanine  & Glucosamine → L-Theanine  & Holy Basil → L-Theanine  & Hyaluronic Acid → L-Theanine  & Inositol → L-Theanine  & Iodine → L-Theanine  & Iron → L-Theanine  & Krill Oil → L-Theanine  & L-Arginine → L-Theanine  & L-Carnitine → L-Theanine  & L-Glutamine → L-Theanine  & L-Lysine → L-Theanine  & L-Tryptophan → L-Theanine  & L-Tyrosine → L-Theanine  & Maca Root → L-Theanine  & Magnesium → L-Theanine  & Manganese → L-Theanine  & Melatonin → L-Theanine  & Milk Thistle → L-Theanine  & Molybdenum → L-Theanine  & Msm → L-Theanine  & Nad Precursors → L-Theanine  & Potassium → L-Theanine  & Pqq → L-Theanine  & Prebiotics → L-Theanine  & Probiotics → L-Theanine  & Protein Powders → L-Theanine  & Quercetin → L-Theanine  & Resveratrol → L-Theanine  & Rhodiola → L-Theanine  & Saw Palmetto → L-Theanine  & Selenium → L-Theanine  & Sodium → L-Theanine  & St Johns Wort → L-Theanine  & Taurine → L-Theanine  & Turmeric → L-Theanine  & Valerian → L-Theanine  & Vitamin A → L-Theanine  & Vitamin B1 → L-Theanine  & Vitamin B12 → L-Theanine  & Vitamin B2 → L-Theanine  & Vitamin B3 → L-Theanine  & Vitamin B5 → L-Theanine  & Vitamin B7 → L-Theanine  & Vitamin B9 → L-Theanine  & Vitamin C → L-Theanine  & Vitamin D → L-Theanine  & Vitamin E → L-Theanine  & Vitamin K → L-Theanine  & Zinc →
04

Common L-Theanine pairings

The most-searched L-Theanine combinations — timing, dosage, and who should be careful.

L-Theanine  & Vitamin D → L-Theanine  & Magnesium → L-Theanine  & Zinc → L-Theanine  & Iron → L-Theanine  & Calcium →

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The complete matrix has all 86 supplements and 7310 pairwise interactions.

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