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Great for Chronic Fatigue & Low Body Temperature

Posted by iHerb Customer on September 10 2006 | Verified Purchase

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!

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Top quality L-Tyrosine

Posted by rawanimal on September 14 2013 | Verified Purchase

This is pure L-Tyrosine powder. L-Tyrosine is a amino acid and dopamine - precursor. It increases dopamine biosynthesis when ingested. L-Tyrosine crosses Brain Blood Barrier and is metabolized into dopamine. Higher L-Tyrosine levels means higher dopamine levels. L-Tyrosine supplementation has been studied to have positive effect on fatigue reduction for people under high stress, for example athletes and bodybuilders. Dosage of 3-5 grams per day is suggested.

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Excellent for mental and physical energy!

Posted by iHerb Customer on January 31 2010 | Verified Purchase

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.

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Essential Amino Acid.

Posted by bodybuilder on June 30 2012 | Verified Purchase

Tyrosine is a Precursor to L-Dopa (L-Dihydroxyphenylalanine) used to create HGH, Adrenalin and Dhea Naturally In your Body (Listed as a Secretagogues (help increase HGH naturally)). most diets contain enough or nearly enough Tyrosine to create all the L-dopa you need but if you are working out all the time or trying to boost your muscle growth you may not be getting enough to make all the L-dopa you need and then you simply don't make the growth hormone to build the muscle, Adrenalin to max your workout or DHEA to do both... As it is an amino acid you might want to check your protein powder or pre-workout stuff doesn't already contain tyrosine... I read somewhere that a normal diet contains about 400mg, the average person needs about 500 to 650mg and it is non toxic up to about 3500mg per day... I take it with choline but beware of possible side effects of some choline variations (common side effect diarrhea).

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Not the right supplement for me

Posted by iHerb Customer on December 9 2009 | Verified Purchase

It made me too energetic and jittery like caffeine--and then I felt worse after coming down. I'm giving very small amounts to my senior dog and seems to improve her energy and reduce her Parkinson's like shaking.

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Doesn't dissolve in water

Posted by iHerb Customer on September 18 2010 | Verified Purchase

I'm certain the quality of this product is just fine, but it does not dissolve in water at all. I end up choking down a gritty mess each day. I like the capsules much better for this product.

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Good stuff!

Posted by iHerb Customer on March 15 2010 | Verified Purchase

I have a terrible time with motivation sometimes and this DEFINITELY helps me focus on work. Worth a lot more than I paid, and I no longer am mentally hungry at all. I'm losing weight this stuff! That was definitely an unexpected but more than welcome side effect.

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5 Stars to counter all moronic ratings

Posted by iHerb Customer on October 1 2017 | Verified Purchase

Giving this product a 5/5 to counter the moronic individuals giving it a poor rating due to the powder not dissolving in water or tasting odd. This is a raw amino-acid powder, you rate it on the effects, not on how well it solidifies or tastes - it's not advertised as a gourmet dinner in a bottle.

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Great for focus in high doses

Posted by iHerb Customer on July 4 2009 | Verified Purchase

Again, NOW have provided a hard to find product of excellent quality at a low cost. Helps improve my mood and focus during difficult training sessions. However, I find the label recommendations regarding dosage to be too conservative. I would advise a dosage of at least 1 gram for athletes/those looking for a mental boost, etc.

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A great find

Posted by iHerb Customer on April 12 2009 | Verified Purchase

Excellent quality, economical and mixes well in a small amount of juice. I use it due to low thyroid function and it has made a big difference in how wellmy medication works.

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