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Leucine - MuscleFeast


Regular price Price: $10.99
All natural All Natural

What is it?

L-Leucine is an α-amino acid with the chemical formula HO2CCH(NH2)CH2CH(CH3)2. It is an essential amino acid, which means that humans cannot make it within their body. So for the body to get this key amino acid in the system it has to pull them from a variety of foods. Its codons are UUA, UUG, CUU, CUC, CUA, and CUG. With a hydrocarbon side chain, leucine is classified as a hydrophobic amino acid. It has an isobutyl R group. Leucine is a major component of the sub units in ferritin, astacin and other 'buffer' proteins. Food sources for leucine are: meat, nuts, beans, brown rice, soy flour, whole wheat and eggs.
Food sources for leucine are: meat, nuts, beans, brown rice, soy flour and whole wheat.

Unique about Muscle Feast's L-Leucine: Our l-leucine is instantized. This allows it to mix in water or other beverage and not just sit on top of the fluid.

Following ingestion, BCAAs are not readily broken down by the liver. BCAAs in the muscle are able to transaminate Pyruvate to form amino acid Alanine, which is then recycled to glucose in the liver via the Cori cycle. If you really want to dig deep down the chemical reactions, I will try to simplify it as much as possible. BCAAs are broken down to their keto-acid analogues by very specific enzymes Branched-Chain Aminotransferase (BCAAT) and Branched-Chain oxo-acid dehydrogenase (BCOAD). Interestingly, the enzyme concentration increases with exercise. If at rest your body has only 5-8% of BCOAD available, during exercise this number goes up to 25%! What does this all mean? That during exercise you use more BCAAs than at rest. Yes, same for all other amino acids. But the BCAAs are used directly by the muscles, and oxidation is one of the things you need to think of if you doubt that proteins are not the best source of energy.

BCAAs are not metabolized in the liver like the rest of nutrients, but they instead circulate and compete for absorption into the blood-brain barrier with the amino acids tryptophan, tyrosine, phenylalanine, and methionine for access to the neural amino acid transport system which allows amino acid entry to the brain.

Recommended dose:

The proper dosage depends on a variety of factors – body weight, activity level, lifestyle stress, overall health, and diet. There are no established daily recommendations for this supplement. As a dietary supplement take 25 - 65 milligrams per pound of bodyweight per day. It is recommended that supplemental valine be used in union with both isoleucine and leucine. Mix into water or your favorite beverage 1-2 times daily or as directed by your physician. Mix for 20-30 seconds using a shaker cup or mix thoroughly with a spoon. May not mix very easily. May be hygroscopic and may clump during shipment. This does not affect the efficacy of the product; just the texture. Try mixing in sport drink or anything with a ph less than water to improve mixability. It may be necessary to let it sit for awhile.

Any Side Effects?

There have not been any reported side effects with BCAA supplement intake: excess BCAAs are usually converted to other amino acid forms, used up as energy, or stored up as fat. However, if you have liver or kidney disease, you should not take in high doses of amino acids without asking your doctor. It is crucial that you always speak to a knowledgeable healthcare provider before taking any dietary supplements, including glutamine. This advice is also recommended for anyone suffering from a health condition.

Pregnant and nursing women should only take an amino acid such as glutamine after consulting your physician.

Shelf Life: This product will retain a 2 year shelf life from the date of manufacturer if properly sealed and stored in a dry, cool environment outside of direct sunlight.

Why Muscle Feast, LLC?

We guarantee our supplements to be the freshest and purest available: Muscle Feast, LLC supplements are manufactured under the strictest HACCP, FDA, and Kosher standards, producing the highest quality and purest supplements available. Our raw ingredients undergo state of the art analysis to ensure zero impurities and strict adherence to product labeling. When it comes to price and quality you can't beat Muscle Feast. We guarantee it!

Important facts you should know about our supplements:
-Laboratory tested for purity
-Strict adherence to GMP, HACCP and Kosher standards
-Licensed and regularly inspected by The Ohio Department of Agriculture
-Freshly manufactured - not expired or closeout
-Spoon mixes with no gritty taste or residue
-Backed by the Muscle Feast 30-day money back guarantee

FREE dosing scoop: Get the exact dosage every time with a free single-dose scoop. Fill to the top, not the line.


BCAA ratios have long been standard at 2:1:1. However, current research suggests that higher levels of L-Leucine produce better results.

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