Everlast d aspartic acid size 60 capsules servings 30 what is everlast d aspartic acid and how does it work a food supplement containing d aspartic acid 750mg with added zinc d aspartic acid is an amino acid that is formed naturally in the body and is used in the synthesis of proteins everlast d aspartic acid also contains zinc which contributes to protein synthesis and acid base metabolism an ideal pairing for those wanting a little extra to complement a heavy weight trai