Power Test is test-booster made by MuscleMeds which contains just two ingredients, only one of which may actually boost testosterone…[Skip to the Bottom Line]
Out of the three human studies done specifically to test the effect of D-Aspartic Acid on testosterone, two have shown a significant increase in Testosterone levels.
A 2012 study from “Advances in Sexual Medicine”, the subjects of which were infertile men (initially low Testosterone) found that 2.66g of D-Aspartic Acid was able to significantly increase Testosterone levels when measured after 90 days of supplementation. These results were in-line with those of an earlier (2009) study in which D-Aspartic Acid supplementation raised Testosterone by 42% after 12 days in healthy men (initially normal Testosterone).
However, a 2013 study published in “Nutrition Research” found that athletes who supplemented with D-Aspartic Acid for 28 days showed no difference in testosterone levels.
The researchers in the failed study noted abnormally high levels of D-aspartate oxidase, the enzyme which degrades D-Aspartic Acid, indicating that prolonged supplementation in individuals with healthy Testosterone levels may cause “negative feedback” which reduces the effects.
Ultimately, D-Aspartic acid is an effective short-term Test-booster for healthy individuals with initially normal Testosterone levels, but the effects may fade after a few weeks of supplementation. Those individuals with abnormally low Testosterone levels may benefit from longer term supplementation however.
Unfortunately, with just 1000mg of D-Aspartic Acid per serving, 3 servings daily of Power Test would be required to achieve a clinical dose, but at 3000mg a day, DAA can be an effective short-term Test-booster.
A-HYDROXYISOCAPROIC ACID (HICA):
A-Hydroxyisocaproic Acid (HICA) is a product of Leucine metabolism which is touted to be an anti-catabolic agent. Currently, very little research exists on HICA in general, but the one human study is certainly encouraging.
A 2010 study, published in the “Journal of the International Society of Sports Nutrition”, found that HICA supplementation (1500mg daily) decreased soreness by about 23% and increased lean mass (no decrease in fat) in healthy subjects, compared to the placebo group.
Ultimately, HICA may help to encourage a more Anabolic environment by improving recovery, but in order to achieve a dose in-line with the above-mentioned study, Power Test users must take 3 servings daily.
THE BOTTOM LINE:
Any Testosterone increase experienced with Power Test can be entirely attributed to D-Aspartic Acid and therefore is likely to be short-lived, as HICA has no influence on Testosterone, but may enhance certain aspects of recovery. The tricky thing about Power Test is the dosing. At about 54 cents per serving, the product appears inexpensive, but in order to achieve true clinically validated doses of each ingredient, 3 servings must be consumed daily. This puts the actual price of Power Test north of $1.50 per serving, pretty expensive for just DAA and HICA. The same formula could be easily reconstructed from scratch for $1 or less per serving.
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[expand title=”REFERENCES” tag=”h5″]
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- D’Aniello, Autimo, Anna Di Cosmo, Carlo Di Cristo, Lucio Annunziato, Leonard Petrucelli, and George Fisher. “Involvement of D-Aspartic Acid in the Synthesis of Testosterone in Rat Testes.” Life Sciences 59.2 (1996): 97-104.
- Willoughby, Darryn S., and Brian Leutholtz. “d-Aspartic acid supplementation combined with 28 days of heavy resistance training has no effect on body composition, muscle strength, and serum hormones associated with the hypothalamo-pituitary-gonadal axis in resistance-trained men.” Nutrition Research 33.10 (2013): 803-810.
- Topo, Enza, et al. “The role and molecular mechanism of D-aspartic acid in the release and synthesis of LH and testosterone in humans and rats.” Reprod Biol Endocrinol 7 (2009): 120.