What it tested
A cream with calendula extract and a plain base cream, both applied to the cheeks of 21 healthy volunteers for eight weeks, and measured each week with a cutometer, a device that reads how skin responds to gentle suction.
What it found
The calendula cream gave significant improvements in skin hydration and firmness over the eight weeks.
What it does not show
It tested a cream left on the skin, not a cleanser that is rinsed off, and not this foam.
Akhtar N, Zaman SU, Khan BA, Amir MN, Ebrahimzadeh MA. Calendula extract: effects on mechanical parameters of human skin. Acta Poloniae Pharmaceutica, 2011, 68(5): 693-701. PMID 21928714.














































