L-Tyrosine vs L-Theanine: One or Both?

The short answer: You can take one or both, because L-tyrosine vs L-theanine compares two different amino acids, not two versions of one. Your body makes tyrosine and uses it as the starting material for dopamine, while L-theanine comes from tea. If you want both, look for printed amounts. Our GABA, L-Tyrosine & Caffeine Capsules hold both, plus caffeine, in one 255 mg proprietary blend per 1-capsule serving that gives no amount for either.

Key takeaways

• MedlinePlus lists tyrosine as a nonessential amino acid, one your body can produce even when your meals don't supply it, while L-theanine reaches you through tea, foods it's added to, or a supplement.
• MedlinePlus Genetics describes tyrosine as the starting point of the pathway that makes dopamine and norepinephrine.
• Our GABA, L-Tyrosine & Caffeine Capsules hold L-tyrosine, L-theanine and caffeine in one 255 mg blend per capsule, and the panel prints no amount for any of the three.
• Blend ingredients must be listed heaviest first, so the seventh-place L-theanine in our GABA, L-Tyrosine & Caffeine Capsules can't top about 36 mg per capsule, less than the 50 mg per strip printed on our L-Theanine & GABA Calm Strips.

A quick disclosure: we sell a capsule with both amino acids, a strip built around L-theanine and drops that print an L-tyrosine amount, and we make money on all three. So we've kept this guide to what their panels actually say, blend gaps included.

L-tyrosine vs L-theanine: how do the two amino acids differ?

L-tyrosine is a protein-building amino acid your body can also make, while L-theanine is a tea amino acid that reaches you from what you drink or take.

The table's main lesson: these aren't rival versions of one ingredient. Tyrosine is raw material your body makes and uses every day, while L-theanine is a tea compound you add from outside. None of the federal pages we cite covers either one as a supplement. "Which is better" really depends on what you want to add, and on what else shares the label.

What does L-tyrosine do in your body?

L-tyrosine is one of the amino acids your body strings together into protein, and it's also the starting material for dopamine, norepinephrine and epinephrine.

The MedlinePlus entry on amino acids lists tyrosine as nonessential, meaning your body can produce it even when your food doesn't supply it. The same entry also calls tyrosine "conditionally essential," a label MedlinePlus uses for amino acids that usually aren't essential but can become so during illness and stress.

According to MedlinePlus Genetics, an enzyme called tyrosine hydroxylase converts tyrosine into an in-between compound that can then become dopamine. Norepinephrine and epinephrine are made from dopamine in turn. The page calls these three catecholamines, chemical messengers released in response to physical or emotional stress.

That's normal chemistry, not a promise about a pill. The page doesn't say extra tyrosine from a supplement raises dopamine in your brain, and we won't claim it either. Our guide on what L-tyrosine does goes deeper; this one stays on the comparison.

Where does L-theanine come from?

L-theanine comes from the tea plant, Camellia sinensis, and reaches you through tea, foods it's added to, or a supplement.

The FDA's GRAS Notice No. 338 concerns L-theanine extracted from tea leaves for use in foods such as drinks and candies, not supplements. Separately, our Calm Strips' panel lists Green Tea (L-Theanine) at 50 mg per 1-strip serving.

MedlinePlus sorts amino acids into essential, nonessential and conditionally essential groups, and tyrosine turns up in two of them. L-theanine isn't on any of those lists, since it isn't one of the building blocks of protein.

What L-theanine does once you swallow it is a question our sources leave open, which is why this guide compares labels instead of effects.

Can you take L-tyrosine and L-theanine together?

Yes, L-tyrosine and L-theanine are sold together, our GABA, L-Tyrosine & Caffeine Capsules included, and the real question is which other ingredients come along.

Our shelf offers two ways to get both. The capsule is the one-pill route, with caffeine in the mix and neither amino acid measured out. The other route pairs the Calm Strips with our Energy Drops: 50 mg of L-theanine per strip and 25 mg of L-tyrosine per 1 ml, with no caffeine listed on either panel. Of the ways to combine these three products, it's the only one where you can count both amino acids. That's our description, though, not something either label directs.

Stacking the capsule with either of the others muddies the numbers. Add a strip, and its 50 mg of L-theanine lands on top of an amount you can't see, capped near 36 mg. Vitamin B6 climbs too, to 11 mg from the capsule's 5 mg and the strip's 6 mg, a total our vitamin B6 limits guide puts in context. Add the drops instead, and L-tyrosine and alpha GPC each arrive from two sources, with only the drops printing amounts.

GABA sits in both the capsule and the strip, and our GABA and L-theanine comparison covers that ingredient.

How much L-tyrosine and L-theanine is in our products?

Our L-Theanine & GABA Calm Strips print 50 mg of L-theanine on each strip, our Energy Drops print 25 mg of L-tyrosine per 1 ml, and our capsule prints neither.

The takeaway: only the strip and the drops tell you your exact intake of either amino acid. The capsule trades that clarity for convenience.

What the blend order reveals

Our capsule's panel names eight blend ingredients in this sequence: GABA, L-tyrosine, caffeine, bacopa extract, phosphatidylserine 20%, alpha GPC, L-theanine and huperzine A 1%. That sequence isn't random. Question 34 of the FDA's Dietary Supplement Labeling Guide says blend ingredients go "in descending order of predominance by weight."

Heaviest first means each ingredient's position caps its weight:

• L-tyrosine is second, so it can't outweigh GABA. At most, it's half of 255 mg, or 127.5 mg.
• Caffeine is third, so it can't be more than a third of the blend: 85 mg.
• L-theanine is seventh, so it's no more than a seventh of the blend, about 36 mg.

Those are ceilings, not measurements, and the real amounts could be much lower. Still, one capsule can't match a single strip's printed 50 mg of L-theanine. Other focus formulas sit together in our Nootropics & Focus range.

From our shop: GABA, L-Tyrosine & Caffeine Capsules — L-tyrosine, L-theanine and caffeine share one gelatin capsule inside a 255 mg blend, a one-a-day option if simplicity matters more to you than exact amounts.

When should you take L-tyrosine and L-theanine?

The best time to take L-tyrosine and L-theanine depends on caffeine, because none of our three labels names an hour and only the capsule lists caffeine.

Start with the capsule. Its blend lists caffeine third, which by the math above means up to 85 mg per capsule. The label never states the real number, so count the capsule as a caffeinated product and give it a morning slot.

The Calm Strips list no caffeine anywhere on the panel, so nothing printed there pins them to the morning. Our guide on timing L-theanine through the day walks through morning versus evening.

The drops list no caffeine either, but their front label reads "Mushroom Energy & Focus Formula," a daytime descriptor.

What about evenings? Leave out anything with caffeine, which rules out our capsule. Neither the strip nor the drops is labeled as a sleep product, and we won't claim otherwise. Our labels also give no onset time or duration for either amino acid.

How do you take the capsule, strips and drops?

Follow each label's own directions: one capsule a day with water, one strip melted on the tongue each day, or 1 ml of drops daily after a shake.

• GABA, L-Tyrosine & Caffeine Capsules. The capsule label asks adults for one capsule a day, taken with 6-8 oz (177-237 ml) of water, and each bottle holds 30. The shell is gelatin, with brown rice flour as the other listed ingredient, which rules it out if you steer clear of animal-sourced capsules. Its one label claim is non-GMO.
• L-Theanine & GABA Calm Strips. The strip label says to set 1 oral strip on your tongue each day and let it dissolve; the directions don't call for water. The label lists vegan and gluten free, and the strawberry-peppermint strip counts monk fruit extract, erythritol and steviol glycosides among its other ingredients.
• Cordyceps & Lion's Mane Energy Drops. Shake well, then take 1 ml (30 drops) daily. The label lists vegan and gluten free, with stevia as the sweetener.

All three cautions read "Do not exceed recommended dose." Missed yesterday? Take today's single serving and carry on.

From our shop: L-Theanine & GABA Calm Strips — each 1-strip serving prints 50 mg of L-theanine from green tea and 25 mg of GABA, and no caffeine is listed on the panel.

Who can skip L-tyrosine and L-theanine?

Plenty of people can skip L-tyrosine and L-theanine, because your body produces tyrosine and L-theanine isn't one of the essential amino acids MedlinePlus lists.

You're a good candidate to pass if:

• Protein foods show up at your meals. MedlinePlus notes that digesting protein releases amino acids, and your body can make tyrosine besides.
• You want only one of the two. The capsule brings both, plus caffeine and five more blend ingredients, while the strips and drops each print one.
• You want to avoid caffeine. Our capsule lists it without a number.
• You're after a guaranteed effect. No label in this guide promises one, ours included.

Who should check with a healthcare provider first?

Pregnancy, nursing, being under 18 or having a medical condition means a talk with a healthcare provider comes first, as each of our three labels states for its own product.

The same conversation makes sense if:

• You take any prescription medicine, since your pharmacist can check it against every ingredient on the panel.
• Caffeine affects you strongly. The capsule can hold up to 85 mg by the blend math, and the true figure isn't printed.
• You have surgery coming up. Your surgical team should hear about every supplement you use, these three included.

Bring the capsule's full Supplement Facts panel to that talk, not just its name. Besides L-tyrosine, L-theanine and caffeine, its blend includes GABA, bacopa extract, phosphatidylserine, alpha GPC and huperzine A, and the panel also lists 8 mg NE (niacin equivalents) of niacin and 5 mg of vitamin B6. If a product doesn't sit right with you, stop taking it and let your provider know.

FAQ: L-tyrosine and L-theanine

Is L-tyrosine or L-theanine better for focus?

We can't rank L-tyrosine against L-theanine for focus, because they're two different kinds of ingredient. Tyrosine is something your body already makes and, per MedlinePlus Genetics, uses as starting material for dopamine and norepinephrine. L-theanine is a tea compound you take in from outside. Our labels don't credit a focus result to either amino acid on its own, so choose by what's printed: 50 mg of L-theanine per strip, 25 mg of L-tyrosine per 1 ml of drops, or a capsule blend with neither amount.

Does L-tyrosine have caffeine in it?

No, L-tyrosine contains no caffeine. It's an amino acid, and caffeine is a separate compound. The confusion comes from products that pair them, ours included. Our GABA, L-Tyrosine & Caffeine Capsules do contain caffeine, ranked third in a 255 mg blend, so each capsule holds no more than 85 mg, true figure unprinted. Our Cordyceps & Lion's Mane Energy Drops print 25 mg of L-tyrosine per 1 ml serving and list no caffeine at all.

How does L-tryptophan compare with L-tyrosine and L-theanine?

L-tryptophan differs from both because MedlinePlus places it in the essential group, the amino acids your body can't make, so it has to come from food. Tyrosine sits in the nonessential group, and L-theanine, the tea compound, isn't in either. None of the three products in this guide lists L-tryptophan, so there's no label to compare it on here.

Is it safe to take L-tyrosine and L-theanine every day?

Each of our three labels directs one serving a day, but a label direction isn't safety evidence, and we couldn't find a federal daily cap or long-term safety data for either amino acid as a supplement. None of the labels suggests using all three products together, and neither do we. Stay at one serving of any product you choose, never exceed the recommended dose, and ask a healthcare provider before long-term use, especially if a label caution fits you.

Does L-theanine interact with medications?

Whether L-theanine interacts with medications isn't covered in any federal fact sheet we found, so check with your pharmacist or provider before combining it with prescription medicine. Bring the full panel, not just the product name. That matters most with our capsule, whose 255 mg blend holds eight ingredients, including caffeine, GABA and huperzine A, none with a printed amount.

Sources

• Amino acids (MedlinePlus Medical Encyclopedia, National Library of Medicine)
• TH gene (MedlinePlus Genetics, National Library of Medicine)
• GRAS Notice GRN No. 338: L-theanine extracted from tea leaves (U.S. Food and Drug Administration)
• Dietary Supplement Labeling Guide: Chapter IV. Nutrition Labeling (U.S. Food and Drug Administration)

If this left you looking for somewhere to start, read L-tyrosine and L-theanine capsules with caffeine — its amounts per serving are listed on the page. For the practical questions this raises, how dosing, sourcing and subscriptions work is answered in one place.