Figure 4From: Protective effect of aqueous extract from Spirulina platensis against cell death induced by free radicals Protective effect of Spirulina extract against apoptotic cell death induced by a) DPPH and b) ABTS. The 3T3 cells were incubated in medium containing Spirulina extract or vitamin C for 1 h before being added with 20 μM DPPH or 50 μM ABTS and incubated for another 24 h before the determination of apoptotic cell death. The positive control contained cells incubated with vitamin C while the negative control contained medium alone. Data presented as mean ± standard deviation (n = 3). *Denotes significant difference (p < 0.05) from "cells + medium + DPPH/ABTS".Back to article page