Lucia, aww thank you so much! Thank you for your support. Hope to see you here often, too. 🙂

Barbara, vitamins are awesome, aren’t they? Let me know how you like the serum. 🙂

Suzanne, ascorbyl glucoside isn’t the best form of vitamin C to treat dark spots but if you only want to prevent wrinkles and brighten skin, it works well. As for the order, the one with the lightest texture goes first. That helps enhance the penetration of both.

Despina, vitamin C, when used with vitamin E and ferulic acid, can indeed boost the protection of your sunscreen. I think it’s safe to apply this combination under your sunscreen as long as you keep reapplying it several times throughout the day. If you don’t, the sunscreen will become ineffective and the vitamin C may indeed make your skin more susceptible to sun damage. I guess some people don’t recommend vitamin C at all during the day because they know very few people bother to reapply their sunscreen as often as it is necessary.

So, either use vitamin C under sunscreen and reapply sunscreen regularly (which you should be doing anyway) or use vitamin C at night. Hope this helps.