quell'inci è semplicemente sbagliato
http://www.springerlink.com/content/rv213453222m874n/+
http://www.ajol.info/index.php/ajfand/article/view/57898/0
http://www.scielo.br/scielo.php?pid=S1413-70542004000300009&script=sci_arttext
Its laxative effect is due to the organic acids present in the calyxes, the most important constituent being hibiscic acid, in addition to lactic, citric, malic and tartaric acids. Also, potassium oxalate, carbohydrates, pigments, glycosides, mucilages, flavonoids (hibiscine and hibiscetine) and anticyanic derivatives (gossipetine and glycoside) which act by decreasing blood viscosity, reducing pressure and stimulating digestion are present. It contain proteins, fibers, calcium, iron, carotenes and vitamrn C in leaves (LECLERC, 1938; TESKE and TRENTINI, 1995).
poi che gli integratori in generale appesantiscano il fegato non ha molto significato, è troppo vaga...