The Difference "D-Aspartic Acid" A recent study was conducted on 23 healthy males between the ages of 27 and 37. One group of men was administered 3,120mg of D-AA while a control group was given a placebo (salt solution) over 12 days. The group of men given D-AA had an average raise in testosterone of 42% as well as a 33% raise in LH levels compared to no increases in the placebo group. Testogen-XR pairs D-AA with 50mg of AstraGin, proven to increase amino acid absorption by 66.7%.
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