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Now Foods, L-Tyrosine, 100% Pure Powder, 4 oz (113 g)
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Now Foods, L-Tyrosine, 100% Pure Powder, 4 oz (113 g)
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Now Foods, L-Tyrosine, 100% Pure Powder, 4 oz (113 g)

By Now Foods

46 Reviews
In Stock
  • Product Code: NOW-00265
  • UPC Code: 733739002655
  • Package Quantity: 4 oz (113 g)
  • Dimensions: 2.625 x 2.625 x 4.75 in, 0.35 lbs (0.16 kg)
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Product Overview

  • Neurotransmitter Support
  • Pharmaceutical Grade
  • Healthy Glandular Function
  • Supports Mental Alertness
  • GMP Quality Assured
  • A Dietary Supplement

L-Tyrosine is a non-essential amino acid that plays an important role in the production of neurotransmitters dopamine and norepinephrine. In addition, because L-Tyrosine is necessary for the synthesis of thyroid hormone and epinephrine (adrenaline), L-Tyrosine supports healthy glandular function and stress response.

Suggested Use

As a dietary supplement, take 1/4 teaspoon in juice or water, preferably between meals, 1 to 3 times daily. Consider taking these other NOW products: L-Phenylalanine and Acetyl L-Carnitine.

Other Ingredients


Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Now L-Tyrosine is Pharmaceutical Grade.


Store in a cool, dry place After opening.

This product is sold by weight not volume.

Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Persons with thyroid disease (hyperthyroidism), melanoma, or those taking MAO inhibitors or other mood altering medications should seek the advice of a physician before consuming this product. Keep out of reach of children.

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Supplement Facts
Serving Size: 1/4 Teaspoon (400 mg)
Servings Per Container: about 283
  Amount Per Serving % Daily Value
L-Tyrosine 400 mg *
* Daily Value not established.

iHerb Customer Reviews

5 Stars
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1 Stars
Great for Chronic Fatigue & Low Body Temperature
Factoids: L-Tyrosine deficiencies are among the most common deficits seen in CFS. Tyrosine is used by the thyroid and adrenal glands to manufacture their natural hormones which regulate the body's ability to produce energy. Recommended use is 500 mg daily for depression and low body temperature. My Experience: I'm dealing with crippling fatigue and after being on Tyrosine for 10 days, have determined that three doses of a 1/2 teaspoon each (800 mg.) on an empty stomach has been a tremendous help in elevating my level of energy. It has also helped me to sweat again. No more cold nights. Though I don't have any signs of a Tyrosine deficiency, it has been a tremendous help therefore my diet must be somewhat deficient in Tyrosine. The powdered Tyrosine has no taste. It's a soft, puffy granule. I simply dump it into my mouth and chase with water. It couldn't be easier. Words of Advice: Using more than 1/2 teaspoon per dose is like having too much caffeine (in my experience). Taking it past late afternoon may keep you from falling asleep at your regular time. Enjoy!
Sep 10, 2006
Excellent for mental and physical energy!
I weigh about 215 lbs and I need to take about 4 grams of this to feel it for physical activities. It works great if taken on a completely empty stomach. An hour later I really notice a difference in football, basketball and Brazilian Jiu JitSu. But just for mental focus I need about 1 to 1 and half grams. You need to play around the dosage to get it right for you. But you must take it on a empty stomach for this to work.
Jan 31, 2010

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