Among treated men, 68% reported increased sexual desire compared to 19% in the placebo group (PubMed 11035391)
Notably, this sequence contains non-proteinogenic residues including alpha-aminoisobutyric acid (Aib) and D-amino acids (D-2-naphthylalanine and D-phenylalanine), which are deliberately incorporated to enhance metabolic stability and receptor-binding selectivity
Jujube also contains meaningful amounts of vitamin C, which plays a critical role in iron absorption meaning it helps the body use the iron it is getting, even when overall intake is reduced
For details, see the What It Does section of the Protein Powders and Drinks Review
Vitamins C, E, and A also provide protection through various mechanisms, including direct scavenging of free radicals and modulation of cellular pathways