Tyrosine
Scientific names: Tyrosine
Alternate names: 2-Acetylamino-3-(4-Hydroxyphenyl)-Propanoic Acid, 2-Amino-3-(4-Hydroxyphenyl)propionic acid, Acetyl-L-Tyrosine, Acétyl-L-Tyrosine, L-Tyrosine, N-Acetyl L-Tyrosine, N-Acetyl-L-Tyrosine, N-Acétyl L-Tyrosine, N-Acetyl-Tyrosine, N-Acétyl-Tyrosine, Tirosina, Tyr, Tyrosinum
Actions: Antidepressant, Antistress
Background
Tyrosine is a type of amino acid, which are the building blocks of protein. The body makes tyrosine from another amino acid called phenylalanine.
In the diet, tyrosine can be eaten in dairy products, meats, fish, eggs, nuts, beans, oats, and wheat. The body uses tyrosine to make chemical messengers that are involved in conditions affecting the brain, such as mental alertness.
People most commonly use tyrosine in protein supplements for an inherited disorder called phenylketonuria (PKU). It is also used for alcohol use disorder, cocaine dependence, and memory and thinking skills, but there is no good scientific evidence to support most of these uses.
In the diet, tyrosine can be eaten in dairy products, meats, fish, eggs, nuts, beans, oats, and wheat. The body uses tyrosine to make chemical messengers that are involved in conditions affecting the brain, such as mental alertness.
People most commonly use tyrosine in protein supplements for an inherited disorder called phenylketonuria (PKU). It is also used for alcohol use disorder, cocaine dependence, and memory and thinking skills, but there is no good scientific evidence to support most of these uses.
Safety Safety definitions
When taken by mouth: Tyrosine is commonly consumed in foods. Tyrosine is possibly safe when taken as a medicine, short-term. It seems to be safe when taken in doses up to 150 mg/kg daily for up to 3 months. Some people experience side effects such as nausea, headache, fatigue, and heartburn.
When applied to the skin: Tyrosine is possibly safe when applied to the skin.
Thyroid disorders: The body uses tyrosine to make thyroxine, a thyroid hormone. Taking extra tyrosine might increase thyroxine levels too much. This could make hyperthyroidism and Grave's disease worse. If you have a thyroid disorder, don't take tyrosine supplements.
When applied to the skin: Tyrosine is possibly safe when applied to the skin.
Special Precautions & Warnings:
Pregnancy and breast-feeding: There isn't enough reliable information to know if tyrosine is safe to use when pregnant or breast-feeding. Stay on the safe side and stick to food amounts.Thyroid disorders: The body uses tyrosine to make thyroxine, a thyroid hormone. Taking extra tyrosine might increase thyroxine levels too much. This could make hyperthyroidism and Grave's disease worse. If you have a thyroid disorder, don't take tyrosine supplements.
Effectiveness
NatMed Pro rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
Effective Effectiveness definitions
- An inherited disorder that increases levels of phenylalanine in the blood (phenylketonuria or PKU). People with PKU are not able to process the amino acid phenylalanine. This amino acid is used by the body to make tyrosine. To prevent tyrosine levels from becoming too low, people with PKU are advised to consume medical foods that contain tyrosine and very little phenylalanine.
Possibly effective Effectiveness definitions
- Memory and thinking skills (cognitive function). Taking tyrosine by mouth might improve mental performance under stressful conditions.
- Memory. Taking tyrosine by mouth seems to improve memory during stressful situations.
Possibly ineffective Effectiveness definitions
- Athletic performance. Taking tyrosine by mouth before running or cycling doesn't seem to improve performance.
Dosing & administration
In the diet, tyrosine is found in dairy, meats, fish, eggs, nuts, beans, oats, and wheat. In supplements, tyrosine has most often been used by adults in doses of 100-300 mg/kg by mouth daily. Speak with a healthcare provider to find out what dose might be best for a specific condition.
Interactions with pharmaceuticals
Levodopa
Interaction Rating=Moderate Be cautious with this combination.
Tyrosine might decrease how much levodopa the body absorbs. By decreasing how much levodopa the body absorbs, tyrosine might decrease the effects of levodopa. Do not take tyrosine and levodopa at the same time.
Thyroid hormone
Interaction Rating=Moderate Be cautious with this combination.
The body naturally produces thyroid hormones. Tyrosine might increase how much thyroid hormone the body produces. Taking tyrosine with thyroid hormone pills might cause there to be too much thyroid hormone. This could increase the effects and side effects of thyroid hormones.
Interactions with herbs & supplements
There are no known interactions with herbs and supplements.
Interactions with foods
There are no known interactions with foods.
Products
View all products
RRP: $43.95$30.77Save: 30%
Per 4 g (Mango Passionfruit):
- L-tyrosine 500 mg
- Acetyl L-carnitine (Acetyl-L-carnitine)
- Camellia sinensis
- Ascorbic acid (Vitamin C)
- Theobroma cacao powder 40 mg
- Pyridoxal 5-phosphate (P5P)
- Stevia rebaubiana
- Piper nigrum 5 mg
- Folate
- Methylcobalamin (Activated B12)
- Hordeum vulgare 20 mg
- Gamma-Butyrobetaine (GBB) 15 mg
- Coffea arabica equiv. caffeine 150 mg
- Alpinia galanga powder 150 mg
- Orthosilicic acid (Silica)
- Citric acid anhydrous
- Xanthan gum
- Chromium picolinate
- Flavour
RRP: $59.95$53.96Save: 10%
Per 4 g (Grape):
- L-tyrosine 500 mg
- Camellia sinensis 200 mg
- Coffea canephora 150 mg
- Theobroma cacao 50 mg
- Gamma-Butyrobetaine (GBB) 50 mg
- Polyphenolic fulvic minerals (Cell Charge™) 10 mg
- Acetyl L-carnitine (Acetyl-L-carnitine) 1 g
- Carnitine tartrate 500 mg
- Citrus aurantium 60 mg
- Aframomum melegueta 25 mg
- Chromium picolinate 200 µg
- Natural flavours
- Malic acid
- Stevia rebaubiana
RRP: $79.99$70.39Save: 12%
Per tablet:
- L-tyrosine 250 mg
- Ascophyllum nodosum powder 41.60 mg
- Plectranthus barbatus ext. 17.65 mg
- Selenomethionine 93.1 µg equiv. selenium 37.5 µg
- Zinc citrate dihydrate 18.67 mg equiv. zinc 6 mg
- Curcuma longa ext. 200 mg
- Rehmannia glutinosa ext. 40 mg
- Riboflavin (Vitamin B2) 5 mg
- Nicotinamide (Vitamin B3) 10 mg
- Pyridoxal 5-phosphate (P5P) 7.81 mg equiv. pyridoxine 5 mg
- Mecobalamin (Vitamin B12) 25 µg
- Ascorbic acid (Vitamin C) 50 mg
- Chromic chloride hexahydrate 512.3 µg equiv. chromium 100 µg
RRP: $50.00$42.00Save: 16%
Per capsule:
- L-tyrosine 200 mg
- Chromium picolinate 132.74 µg equiv. chromium 16.5 µg
- Cinnamomum verum ext. 50 mg
- Fucus vesiculosus ext. 6.25 mg
- Eucommia ulmoides ext. 75 mg
- Yeast 6.25 mg equiv. selenium 12.5 µg
- Ilex paraguariensis ext. 75 mg
- Paullinia cupana kunth ext. 25 mg
- Plectranthus barbatus ext. 15 mg
- Punica granatum ext. 10 mg
- Zinc gluconate 19.23 mg equiv. zinc 2.5 mg
RRP: $49.95$42.46Save: 15%
RRP: $49.95$34.97Save: 30%
Per tablet:
RRP: $50.00$41.99Save: 16%
Per tablet:
- L-tyrosine 75 mg
- Panax quinquefolius ext. 275 mg
- Rhodiola rosea ext. 150 mg
- Rehmannia glutinosa ext. 40 mg
- Pyridoxine hydrochloride (Vitamin B6) 12.5 mg equiv. pyridoxine 10 mg
- Calcium pantothenate (Vitamin B5) 54.59 mg equiv. pantothenic acid 50 mg
- Calcium folinate (Activated folate) 271 µg equiv. folinic acid 250 µg
- Co-methylcobalamin (Vitamin B12) 100 µg
- Biotin 2.5 mg
- Ascorbic acid (Vitamin C) 150 mg
- Selenomethionine 186 µg equiv. selenium 75 µg
- Zinc amino acid chelate 40 mg equiv. zinc 8 mg
RRP: $59.99$50.39Save: 16%
Per tablet:
- L-tyrosine 75 mg
- Panax quinquefolius ext. 350 mg
- Lavandula angustifolia oil 81 mg
- Magnesium citrate 500 mg equiv. magnesium 81 mg
- Magnesium glycinate dihydrate 431.03 mg equiv. magnesium 50 mg
- Magnesium amino acid chelate 100 mg equiv. magnesium 20 mg
- Rehmannia glutinosa ext. 40 mg
- Calcium pantothenate (Vitamin B5) 54.59 mg equiv. pantothenic acid 50 mg
- Pyridoxine hydrochloride (Vitamin B6) 25 mg equiv. pyridoxine 20.57 mg
- Calcium folinate (Activated folate) 270 µg equiv. folinic acid 250 µg
- Co-methylcobalamin (Vitamin B12) 100 µg
- Biotin 2.5 mg
- Ascorbic acid (Vitamin C) 150 mg
- Selenomethionine 186 µg equiv. selenium 75 µg
- Zinc amino acid chelate 75 mg equiv. zinc 15 mg
RRP: $59.99$50.39Save: 16%
RRP: $40.95$33.78Save: 18%
Per 10 g (Juicy Peach):
- L-tyrosine
- Acetyl L-carnitine (Acetyl-L-carnitine)
- Creatine monohydrate
- Taurine
- Coffea canephora ext.
- Natural flavours
- Citrus limon (Lemon) 0.9 g
- Beta vulgaris (root) powder (Beetroot)
- Sea Salt
- Quinoa (sprout) powder
- Zinc
- Paullinia cupana kunth (seed)
- Ginkgo biloba
- Eleutherococcus senticosus
- Coleus forskohlii
- Panax ginseng
- Camellia sinensis ext.
- Ilex paraguariensis
- Oryza sativa (Rice hulls)
- Sunflower seed extract
- Luo Han Guo (fruit) ext. (Monk fruit)
- Thaumatin
- Prunus persica (fruit) (Peach) 1.6 g
RRP: $56.95$47.27Save: 17%
Per 10 g (Apple Berry):
RRP: $69.95$59.46Save: 15%
Discontinued by ATP Science
Per 30 g (Choc Hazelnut):
RRP: $49.95$41.21Save: 17%
Per serve (Vanilla Bean):
- Egg albumen powder
- Vanilla planifolia (bean)
- Natural flavours
- Stevia rebaubiana
900 g Vanilla Bean
RRP: $74.94$61.83Save: 17%
1 kg Chocolate
RRP: $79.95$67.96Save: 15%
Per 30 g (Cacao):
- Pea protein isolate 25.2 g
- Dunaliella salina equiv. beta-carotene 390 µg
- Aloe barbadensis 1 g
- Malpighia glabra equiv. vitamin C 50 mg
- d-alpha-Tocopheryl acid succinate 2.5 mg
- Natural chocolate flavour
- Stevia rebaubiana
- Thaumatin
- Luo Han Guo (fruit) ext. (Monk fruit)
RRP: $50.20$32.64Save: 35%
Per serve (Vanilla Bean):
1 kg Vanilla Bean
RRP: $59.95$49.46Save: 17%
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This monograph was last reviewed on 30/04/2023 10:00:00 and last updated on 07/02/2022 23:40:56. Monographs are reviewed and/or updated multiple times per month and at least once per year.
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Natural Medicines rates safety based on scientific evidence according to the following scale: Likely Safe, Possibly Safe, Possibly Unsafe, Likely Unsafe, Unsafe, and Insufficient Evidence to Rate. For more information about Natural Medicines’ Safety Rating System, click here.
The Natural Medicines Effectiveness Ratings are assigned for specific indications. A product might be rated "Possibly Effective" for one condition, but be rated "Likely Ineffective" for another condition, depending on the evidence. For more info click here.
