I won't comment on whether Heliocare is effective or not since I really have no idea. But please remember that it is still no substitute for using sunblock. Sunblock works by chemical and mechanical blocking of the skin from UV radiation so that skin damage doesn't take place. Please remember to use sunblock regularly if you're out in the sun regularly and to remember to reapply every 2-3 hours (and more frequently if you're in the water). You can still use Heliocare if you wish on top of using sunblock but it really doesn't replace it.
This has been your public health announcement for the day. :D
Masaki