Diet CitriMax Complex combines a concentrated extract of the fruit of the Garcinia cambogia tree with the trace mineral chromium and the amino acid L-phenylalanine. The principal acid of garcinia fruit, (-)hydroxycitrate, has been shown to curb appetite and inhibit fatty acid synthesis (production) in animal studies. (Results of animal studies may not extrapolate to humans.) Chromium is a mineral that plays an important role in blood sugar regulation. L-Phenylalanine is an essential amino acid that acts as a precursor to the neurotransmitters epinephrine and norepinephrine. L-Phenylalanine and its derivatives are associated with an enhanced mood.