Tyrosine: Food Sources & Daily Intake

Table of Contents

1. How to Read These Tables
2. Recommended Intakes & Upper Limits
3. Bioavailability & Absorption
4. Cooking & Storage
5. Vegetarian & Vegan Sources
6. Who Needs to Pay Attention
7. Key Research Papers
8. Connections
9. Featured Videos

How to Read These Tables

• Conditionally essential. Your body usually makes tyrosine from phenylalanine, so a healthy person eating enough protein rarely needs it from food directly. It becomes essential — meaning it must be eaten — when phenylalanine is low or when the conversion enzyme is missing or impaired.
• Grams per 100 g, not %DV. There is no U.S. Food and Drug Administration Daily Value for individual amino acids, so this table reports the absolute grams per 100 g of food and ranks foods by that. A typical serving is shown beside each food.
• Counted with phenylalanine. Nutrition guidelines set a single combined target for phenylalanine + tyrosine (about 25 mg per kg of body weight per day), because the two amino acids are metabolically linked — phenylalanine can be turned into tyrosine, but not the reverse.

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Recommended Intakes & Upper Limits

Tyrosine has no Daily Value: the U.S. food-label rules (21 CFR 101.9) set none for it, and the green and yellow marks in the food table above only rank each food against the richest food listed. The table below summarizes its status.

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Bioavailability & Absorption

Tyrosine from food is well absorbed as part of dietary protein. One quirk sets it apart from most amino acids: getting tyrosine into the brain — where it is converted to dopamine and noradrenaline — depends on a shared transporter that also carries the other large neutral amino acids (phenylalanine, tryptophan, leucine, isoleucine, valine). They compete for the same doorway, so a meal very high in mixed protein does not flood the brain with tyrosine the way an isolated dose can. This competition is the reason supplement studies use purified tyrosine on an empty stomach, and it is why simply eating protein keeps brain chemistry in a steady, balanced range rather than spiking it.

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Cooking & Storage

Amino acids are stable to ordinary cooking — tyrosine is not destroyed by normal heat, and cooking actually makes protein easier to digest. The slow protein breakdown of aging and fermentation is why hard cheeses such as Parmesan are so tyrosine-rich: as the cheese matures, proteins are split into free amino acids, and tyrosine, being poorly soluble, sometimes appears as the tiny white crystals seen in well-aged cheese. No special handling is needed for cooking at home.

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Vegetarian & Vegan Sources

Plant-based eaters can get plenty of tyrosine with a little variety. The strongest plant sources are pumpkin and sesame seeds, peanuts, almonds, lentils and beans; for those who eat dairy, aged cheeses are by far the densest source of all. Because no single plant food carries every essential amino acid in ideal proportion, eating a mix across the day — legumes plus seeds plus whole grains — supplies tyrosine’s parent amino acid phenylalanine and everything else the body needs to make tyrosine itself.

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Who Needs to Pay Attention

True tyrosine deficiency is rare in anyone eating enough total protein, because the body simply makes it from phenylalanine. The one group that genuinely cannot is people with PKU, an inherited disorder in which the phenylalanine-to-tyrosine enzyme is missing; for them tyrosine becomes a true essential nutrient. They must restrict phenylalanine and add supplemental tyrosine, since for them it becomes a true essential nutrient — this is done under medical supervision. The main treatment, run under medical supervision, is a diet that restricts phenylalanine, started in the newborn period. What is not known is whether extra tyrosine on top of that diet helps: a 2021 Cochrane review found only three suitable trials, with 56 people in total, in which tyrosine supplements raised blood tyrosine but made no significant difference to any other outcome measured; the reviewers concluded that no recommendation can be made either way, and that more randomised trials are needed. A few interactions are worth knowing: tyrosine is a building block for thyroid hormone, which is why high-dose supplements raise a question for people with thyroid conditions, and because it shares an absorption pathway with the Parkinson’s drug levodopa, large protein meals or tyrosine supplements can blunt that medication’s effect. For everyone else, a normal varied diet covers tyrosine comfortably.

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Key Research Papers

1. NIH MedlinePlus — Amino acids
2. National Academies — Dietary Reference Intakes: Protein and Amino Acids (2005), Chapter 10
3. PubMed — tyrosine, catecholamines and cognitive performance under stress. — Search PubMed
4. PubMed — phenylalanine and tyrosine requirements in humans. — Search PubMed
5. Remmington T, Smith S. Tyrosine supplementation for phenylketonuria. Cochrane Database Syst Rev. 2021;1(1):CD001507. — three trials, 56 participants: blood tyrosine rose, no other outcome differed. — PubMed PMID: 33427303

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Connections

• All Amino Acids
• Dopamine, Reward & How Habits Hijack You — interactive animation
• Tyrosine (Main Page)
• Tyrosine Benefits
• Tyrosine History
• Phenylalanine
• Tryptophan
• Eggs

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Featured Videos

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