GABA, Gamma Aminobutyric Acid, is an amino acid classified as a neurotransmitter (A neurotransmitter is a substance that transmits nerve impulses across a synapse. A synapse is a region where nerve impulses are transmitted across axon terminals.)

GABA's high concentration in the hypothalamus suggests this amino acid plays a significant role in hypothalamic-pituitary function. The hypothalamus is a region of the posterior section of the brain and is the regulating center for visceral (instinctive) functions such as sleep cycles, body temperature, and the activity of the pituitary gland. The pituitary gland is the master endocrine gland effecting all hormonal functions of the body. One primary hormone of concern to the athlete is growth hormone (GH) and its various hormonal constituents. The amino acid GABA has been shown in numerous studies to promote significant increases in plasma growth hormone levels.

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GABA (AST) - Average rating 5 (7 reviews)  - Write a review Show Reviews Reviews (7) (0) (0) (0) (0) See all 7 reviews   May 06, 2012 Reviewer: Jon in Ohio This really does knock you out. I fall asleep within 30-60 minutes of taking this. I sleep for hours before waking. I used to wake 3-4 times a night. Now I only wake up once a night, if at all. Was this review helpful to you? Yes  No February 11, 2010 Reviewer: A customer in New Hampshire This stuff is GREAT! I've been doing P90X for one month now and haven't slept so great from being sore all the time. Slept like a baby the first night and felt great the next day and in a very relaxed good mood! Day two and three were just the same. Not sure if this stuff is supposed to relieve the soreness but I have noticed a huge difference on the second day after heavy lifting. I have not been nearly as sore. I did not expect this benefit at all so this is a HUGE bonus for me! I have only been using three grams and its been working great...very deep sleep and very refreshed in the morning. I used to take Secretagogue One one but not any more! 20 bucks..less than a dollar a day for GREAT sleep.....priceless!! Was this review helpful to you? Yes  No July 20, 2009 Reviewer: Arena in United Kingdom/Great Britain Haven't tried any other brand , but AST GABA is banging. After a couple months of continuous use I started seeing kilos drop off me even when I wasn't expecting them to. Had a funny experience a couple weeks ago when I got on scale to see "how much damage I had done" while I had overseas visitors...... I was -2Kg when I was expecting +2Kg. You certainly dream up a storm as well. Don't take more than the stated 5g though or you'll be groggy in the morning. Was this review helpful to you? Yes  No August 23, 2007 Reviewer: Chris in Iowa Good sleep recovery supplement. Can't taste it at all. Good night sleep. The side effects are short such as shortness of breath and tingling of your skin, but that's just GABA doing its job. There is one bad thing - do not smell the powder. It has an AWFUL smell. Was this review helpful to you? Yes  No April 04, 2007 Reviewer: Huw in United Kingdom/Great Britain I use this when on stressful training cycles and it works a treat for getting a restful nights sleep. The increase in GH levels is an added bonus. The only downside is the need to cycle as its potency diminishes over time. AST's is the best I've tried. Was this review helpful to you? Yes  No See more reviews

63-0355 AST GABA 100 g Nutrition Facts Serving Size: 3 Scoops Servings Per Container: 33 Amount Per Serving % Daily Value* Gamma Aminobutyric Acid 3  g   *Percent Daily Values are based on a 2,000 calorie diet.   Recommended Use: For adults only. As a dietary supplement, take 3 to 5 grams mixed with 8 ounces of water, juice or protein shake approximately 30 minutes before sleep. Warning: GABA is a naturally occurring amino acid classified as a neurotransmitter. Some individuals may experience a minor tingling of the skin and/or slight shortness of breath shortly after taking GABA. This is a characteristic of this amino acid and quickly subsides. If you notice any errors in the information above, please let us know. If you have further questions about this product, please contact AST at 1-800-627-2788 The nutrition facts listed above are supplied as a courtesy to our customers. The nutrition facts were current and accurate to the best of our knowledge at the time they were entered. Manufacturers often change formulas or ingredients without notifying us. We do our best to keep them as up to date as possible, however Netrition.com will not be held responsible for any differences between what is listed on our web site and what is listed on the product that you receive. If you need to be 100% certain of the ingredients currently being shipped, we recommend that you call or email our customer service department to check the shelf of current stock.