AST BCAA 4500 Amino Acid Muscle Recovery & Endurance 462 capsules

AST Sports Science

Amino Acids

AST Sports Science

BCAA is short for Branched Chain Amino Acid. The BCAAs are leucine, isoleucine and valine. These are 3 of the 9 essential amino acids in the human body. Essential amino acids cannot be produced by the body. You must get them through your diet. These 3 unique amino acids make...
$ 39.50
$ 39.50
Add to wishlist

BCAA is short for Branched Chain Amino Acid. The BCAAs are leucine, isoleucine and valine. These are 3 of the 9 essential amino acids in the human body. Essential amino acids cannot be produced by the body. You must get them through your diet. These 3 unique amino acids make up over 40% of your daily required essential amino acid intake.

BCAAs are unique in many ways but one extraordinary aspect of these 3 amino acids is that they bypass liver metabolism and are transported and metabolized directly in muscle. They are the primary building blocks of muscle tissue proteins. They also are carbon and nitrogen precursors for the synthesis of alanine, glutamate, and glutamine.

Anabolic Effects of BCAA

BCAAs are shown to have anabolic effects in human muscle. They are required for muscle tissue maintenance and preserve glycogen stores in muscle tissue. The BCAAs are the primary amino acids responsible for protein synthesis. In fact, the tissue building effects from protein are primarily due to BCAAs.

The anabolic activity of BCAAs are from multiple pathways. Studies show that the BCAAs and in particular leucine stimulates muscle protein synthesis by acting as both a signal and a substrate. One way BCAAs do this is through signaling mTOR activity in human muscle tissue. mTOR is the primary regulator of muscle growth through amino acid sensoring. BCAAs appear to signal mTOR to activate protein synthesis after exercise.

This is a significant anabolic signaling effect activated by BCAA

Anti-Catabolic Effects of BCAA

BCAAs effect on increasing lean muscle tissue stems from its anabolic activity as well as its anti-catabolic activity. Studies show taking BCAAs before training is effective at suppressing muscle tissue breakdown after training.

These study results suggest that BCAAs have a protein-sparing effect during the recovery after exercise, and that protein synthesis is stimulated and/or protein degradation is decreased. There are also indications, though difficult to measure, that these same effects happen during exercise as well.

With BCAA supplementation you get greater protein synthesis and less protein breakdown.

Reduce Muscle Damage and Soreness

BCAAs reduce training induced muscle damage and soreness. Studies performed on athletes supplementing with BCAA showed reduced levels of key markers indicative of muscle damage, reduced inflammation, and effectively reduced perceived muscle soreness.

Blood samples after BCAA intake showed dramatic decreases in creatine kinase (CK) and lactate dehydrogenase (LDH) – both markers of muscle damage. Lower levels of CK and LDH indicate less muscle tissue damage and inflammation. Less muscle damage, soreness and inflammation leads to quicker recovery times. Your body spends more time in anabolic mode.

BCAAs Reduces Fatigue and Enhance Endurance

One unique effect of BCAA is its prevention of central fatigue allowing for high intensity training for longer periods of time. Research on BCAA supplementation during exercise does show they increase mental alertness and reduce mental fatigue.

In the blood stream BCAAs compete with tryptophan (the tranquilizing amino acid). Tryptophan is the direct precursor to the neurotransmitter serotonin. This depresses the central nervous system and produces symptoms of fatigue. When you exercise intensely, the ratio of tryptophan to BCAA is altered in favor of increases in tryptophan. This in itself makes you fatigued. Several studies with various types of athletes confirm that BCAAs reduce mental fatigue and increase mental alertness during their respective events.

Less fatigue during exercise and other physical activities as well as sharper mental focus and concentration supports enhanced athletic performance. Anytime you can train harder and concentrate better you’ll get results faster.

Fast Ball Stays Fast

An interesting sport specific study (baseball) showed BCAA supplementation prevented the drop in pitching velocity that occurs after approximately 100 pitches – delaying fatigue and extending muscular endurance. In this rather unique study, college and pro level pitchers supplementing with BCAA showed no abrupt drop in pitching speed when those that didn’t supplement saw significant speed decreases. BCAAs could spell the end to the “Closer” in Major League Baseball.

While studies show significant decreases in training fatigue other studies also show BCAA supplementation enhances endurance by extending time to exhaustion during exercise.

Get Anabolic – Stay Anabolic!

As you can see, BCAAs are the most extensively researched amino acids. When it comes to turning on anabolic activity in muscle tissue while turning off anti-catabolic activity, no other amino acids have shown such direct effect.

To sum up what BCAA 4500 can do for you – increase anabolic effects of exercise, decrease anti-catabolic effects of exercise, reduced muscle damage, reduce muscle soreness during and after exercise, decrease recovery time, increase mental focus, decrease mental and physical fatigue, increase endurance, and enhance protein synthesis.

BCAA 4500 comes in a big 500 capsule bottle. Each serving contains 2250 mg of L-Leucine, 1125 mg of L-Isoleucine, and 1125 mg of L-Valine. Capsules are easy to swallow and fast acting.

BCAA 4500 is your ticket to getting anabolic and staying anabolic!

  • Reduce Muscle Breakdown

  • Increase Glycogen Storage efficiency

  • Promote Growth Hormone Circulation

  • Increase Lean Muscle Size

  • Increase Muscle Work Capacity

  • Increase Endurance

  • Enhance Recovery

  • Reduce Muscle Soreness

BCAA 4500 Supplement Facts


*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Returns Policy

You may return most new, unopened items within 14 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within three weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (2 to 5 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Recently Viewed Products