Porphyra
Porphyra (Bangiales, Rhodophyta), delicious red algae widely
consumed in eastern Asia, contains high levels of free amino acids;
when exposed to intense radiations, it synthesizes UV-absorbing
secondary metabolites such as mycosporine-like amino acids. There
are almost seven species of Porphyra identified in India. Among all of
these, nowadays Porphyra vietnamensis are gaining more attention.
Marketed Aloe vera gel had low absorption power over broad UV
wavelength (250-400 nm) as compared with isolated compound gel,
suggesting that Porphyra-334 is more potent.2