Nello studio che ho postato sopra c'è un passaggio che parla di queste differenze:
Finally, since equol can be expressed as isomers, the type of equol tested (racemic, S-equol or R-equol) has been examined in a comprehensive investigation using PCR/mRNA quantification methods of human skin gene expression. In general, R-equol and/or racemic were more potent compared to S-equol in the obtained results for various human skin biomarkers [85]. For example, only three genes displayed the greatest significant expression by S-equol, whereas 16 genes displayed the greatest significant levels (either stimulation or inhibition) by R-equol and/or racemic equol, such as extracellular matrix proteins (i.e., collagen and elastin), nerve growth factor, aging genes (FOS, 100 A8 and A9 calcium-binding proteins, 5alpha-reductase type 1, and matrix metalloproteinases (1, 3, and 9)), and the inflammatory genes (e.g., interleukin-1 alpha, interleukin-6, and cyclooxygenase-1). Also, collagen type I expression in fibroblasts was greater with racemic versus S-equol treatment at 1 and 10 nM.
Sì il racemico può essere una soluzione valida (credo che nello Zemiar, l'equolo naturale sia proprio di questo tipo, ottimo che sia in abbondanza, perché a quanto capisco la parte del leone la fa l'R-equol).
Ciao
MA - r l i n