NRTIs caused average lifespan extension.

Lifespan extension is dependent on the timing of exposure: A, exposure from larval L1; B, exposure from larval L4. NRTI concentration = 200μM. All animals are N2 at 20°C, mean and maximum refer to the amount of days after L1 (A), and L4 (B). Statistics of NRTIs at L4 were conducted compared their respective DMSO control (AZT, d4T, ddI, & FLT = 0.067%; ddC = 0.2%). All other statistics are compared to controls. SEM = standard error of the mean.