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DAA – The Great D-Aspartic Acid Paradox

In 2015, Melville GW et al tried to reproduce the same study as Willoughby et al but also tested 6g dose as well as the 3g dose to try and establish the effective dose. The 3g dose had a drop in testosterone instead of an increase but this drop was not statistically significant and they also showed the same as previous studies confirming that 3g per day for 28 days has no effect on improving serum hormones, performance or body composition. But the real surprising find in the study was that the 6g dose showed a greater drop in testosterone that was statistically significant compared to the 3g dose and placebo.

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