L-Tyrosine?

donicagalek

Anyone try it? At what dose? Effectiveness?

hroush

It's just one of the 20 amino acids. If your body isn't low then it will just burn it or excrete it.

sweebum

I have heard it helps with energy.

Here's a sum up from bodybuilding.com:

What is it and where does it come from?

L-tyrosine is a nonessential organic amino acid that is a building block of protein. It is an organic amino acid due to the presence of a carbon atom in its makeup.


It is a precursor of the neurotransmitter dopamine, as well as a precursor to the adrenal hormones norepinephrine and epinephrine.1 The body can make L-tyrosine from the amino acid phenylalanine. L-tyrosine rich foods include animal meat, wheat products, oatmeal and seafood.

What does it do and what scientific studies give evidence to support this?

L-tyrosine may help athletes avoid overtraining, due to its ability to offset fatigue.2* Because L-tyrosine is a precursor of Dopamine, supplementing with L-tyrosine may heighten mental alertness, increase feelings of well being, and offset physical and mental fatigue.3,4*

Who needs it and what are some symptoms of deficiency?

Everyone. Populations in need of L-tyrosine include: athletes, people trying to lose weight, and the elderly. Hard training athletes may benefit from supplementing with L-tyrosine as it helps to offset fatigue and stress associated with intense training.* L-tyrosine also serves to protect the integrity of the skin.* Melanin, a substance which acts to protect the skin when the epidermis has been exposed to ultraviolet light, is derived from L-tyrosine. If a shortage of melanin is present within the body [because of a lack of L-tyrosine], skin defenses will be compromised. Melanin, which is derived from L-tyrosine, chemically reacts with sunlight to form a protective shield that protects the deeper layers of skin tissue.*

People attempting to lose weight may benefit from supplemental L-tyrosine. The thyroid is responsible for the manufacture of T-cells. L-tyrosine influences the manufacture of thyroxin [T-cells], which influences basal metabolic rate. Because of this, L-tyrosine may prove effective for weight loss.*

Learn more about the benefits of L-Tyrosine on Clayton South's Health Facts.

How much should be taken? Are there any side effects?

At this time clear dosing guidelines have not yet been established, so it is best to do what is known as "tolerance mapping".

Take a small dosage for one week, note the benefits and the side effects, and increase the dosage until the benefits are maximized and the side effects minimized. Over time the two will converge and you will hit the optimal dose. This process is similar to "receptor mapping" for bodybuilders who use insulin and steroids.

Many protein powders on the market are fortified with amino acids, including tyrosine. With this in mind, pay particular attention to how much tyrosine you are ingesting from all sources. No side effects have been reported, although as with any amino-acid, overdose is a possibility. Individuals suffering from psychiatric conditions should consult a qualified medical practitioner prior to the use of supplemental L-tyrosine.

If you do not feel comfortable following the above-described procedure, it is always best to follow the directions as prescribed on the products label.



Republished from Clayton South's Health Facts.

hroush

L-tyrosine is a nonessential organic amino acid that is a building block of protein. It is an organic amino acid due to the presence of a carbon atom in its makeup.

All amino acids are organic and they all have at least 2 carbons. I don't even think it's possible to have an inorganic amino acid. Tyrosine has a carbon ring structure with a total of 8 carbons.

Notice everything in there said "may", as in it may do this. Pretty much if you consume any amount of protein in a day from natural sources (don't know about supplements, but probably), you shouldn't have a problem getting more than enough protein.

donicagalek

Notice everything in there said "may", as in it may do this. Pretty much if you consume any amount of protein in a day from natural sources (don't know about supplements, but probably), you shouldn't have a problem getting more than enough protein.

Kinda why I started this thread. :-D I wanted to see if anyone experienced anything beyond the "may" before I buy it. I had weight loss surgery last summer. Roux en Y actually, and they take a piece of intestine out with that which may cause deficiencies with certain things. Doesn't hurt to ask if anyone has used it. :-)

hroush

Notice everything in there said "may", as in it may do this. Pretty much if you consume any amount of protein in a day from natural sources (don't know about supplements, but probably), you shouldn't have a problem getting more than enough protein.

Kinda why I started this thread. :-D I wanted to see if anyone experienced anything beyond the "may" before I buy it. I had weight loss surgery last summer. Roux en Y actually, and they take a piece of intestine out with that which may cause deficiencies with certain things. Doesn't hurt to ask if anyone has used it. :-)

Did they give you a list of what those deficiencies are? I believe if I remember correctly certain parts of the intestine absorb certain things, maybe. I would suggest getting a full blood analysis to see what you are short on so that you can modify your diet. If that doesn't work start on the supplements.

GTakay

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mahidac

Supplementing any specific amino acid is unnecessary and IMO is entirely a ploy from vitamin companies.

the concept behind supplemented tyrosine is that because it is the main catecholamine precursor that you will have extra catecholamines and will give you more energy. Sounds great in theory but your body just doesn't work like that, just because it may have a surplus of one specific AA it wont decide to up your catecholamines

there are plenty of drugs that effectively increase your circulating catecholamines but they are generally all prescriptions.

Acg67

Supplementing any specific amino acid is unnecessary and IMO is entirely a ploy from vitamin companies.

the concept behind supplemented tyrosine is that because it is the main catecholamine precursor that you will have extra catecholamines and will give you more energy. Sounds great in theory but your body just doesn't work like that, just because it may have a surplus of one specific AA it wont decide to up your catecholamines

there are plenty of drugs that effectively increase your circulating catecholamines but they are generally all prescriptions.

ephedrine and yohimbine are OTC...

Going4Lean

bump

mahidac

isn't ephedrine banned in the US? pretty sure it is - the pseudoephedrine and ephadra thats regularly available doesnt have the same catecholamine depletion as real deal ephedrine

yohimbine acts as a Alpha adrenergic blocker not a catecholamine pool depletor, it does have an effect on cats but its a feed back effect, yohimbe is the plant extract version of that i believe

but yeah your right - they are both OTC - and ephedrine definitely delivers on increasing sympathetic stim.

1,3 DMS is also still legally sold in the US and that increases catecholamine levels as well.

Acg67

isn't ephedrine banned in the US? pretty sure it is - the pseudoephedrine and ephadra thats regularly available doesnt have the same catecholamine depletion and real deal ephedrine

yohimbine acts as a Alpha adrenergic blocker not a catecholamine pool depletor, it does have an effect on cats but its a feed back effect, yohimbe is the plant extract version of that i believe

but yeah your right - they are both OTC - and ephedrine definitely delivers on increasing sympathetic stim.

1,3 DMS is also still legally sold in the US and that increases catecholamine levels as well.

ephedrine is still legal, ephedra is not

thought yohimbine also can increase NE by increasing the rate dopamine is converted to NE, but i may be mistaken.

mahidac

I wanna say the only way to increase NE synth from DA would be to block NE so that it gives DA decarboxylase more time to work - but that's entirely speculation on my part - I know there are plenty of drugs that inhibit DA decarboxylase but I don't know of anything that would induce it.

And wow I didn't know ephedrine was still legal - nuts learn something new everyday!