What a great question! Your Heliocare is a fantatstic product, and yes it does contain some protection in this form, but remember and SPF has a very specific function and cannot contain too many ingredients that penetrate the skin as its function is to stay in the skin’s very superficial layers. For the conditions you have mentioned, yes an antioxidant serum would be very beneficial, but so would a repairing serum. An antioxidant serum is very protective and so it is best to apply these in the morning, to protect your skin through the day. "Repair" serums are really great to repair the day’s damage at night while you sleep, so these are great to apply at night. So to be perfectly honest, the best recipe would be to use both.