D-ASPARTIC ACID is a naturally occurring non-essential amino acid. It may act as a sexual stimulator for men by helping to enhance libido and overall performance. A human study showed that it raised natural testosterone levels in healthy adult males an average of 42% in as little as 12 days, with some experiencing a boost of over 50% for the same time period, suggesting this may be beneficial for athletes and fitness enthusiasts looking to increase lean muscle and lift more weight.Developed as part of our Manage your Dosage approach to supercharging your pre-workout, intra-workout and lifestyle supplement stack. This ingredient mixes easily into existing formulations and quickly elevates your performance levels.