Calendula (Calendula officinalis L.) References
Akhtar N, Zaman SU, Khan BA, et al. Calendula extract: effects on mechanical parameters of human skin. Acta Pol.Pharm. 2011;68(5):693-701.
Andersen FA, Bergfeld WF, Belsito DV, et al. Final report of the Cosmetic Ingredient Review Expert Panel...
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