Fancl Sun Guard SPF 30 PA+++ (HG) So far, the best I've tried is Fancl's Sun Guard. It is now in my HG list. I had previously dedicated a review on it.
I recently learnt that it is a physical sun block that uses "UV dispersion agents" and also employs "nano-sized UV dispersion particles" that ensure it doesn't give a white-cast. To be honest, I can say that it is the ONLY product that has proven to prevent my skin from getting darker, although I can't find any write-up on what makes it so effective in preventing tanning. I use Sun Guard exclusively on my face and neck. My face and neck never got darker when I got into the sun. In contrast, I got darker on my arms etc when I got into the sun, using other sunscreens on my body. And I don't reapply this, needless to say, because it's on my face, below all my makeup. The slight negative is that it's very expensive in Singapore, retailing for S$45.50 (in Japan it's only 2,310円! Darn, should have stocked up!)
Biore UV Perfect Milk SPF 50+ PA+++ I liked this for its drugstore price and the "feel". It is milky, light and absorbs quickly, leaving the skin smooth, but beyond that, I'm not sure about the effectiveness of this product. I don't think it helped to prevent tanning. I've finished all the bottles that I have and won't be buying more of this.
Avene Very High Protection Lotion (HG)
I bought Avene's Very High Protection Lotion at a huge discount a couple of days ago. Robinson's is selling it packaged with a wash at $49.90 and I got an additional 20% discount with my Robinson's card. The sun block itself is retailing for about S$62, if I remember correctly. From what I read on the label, it looks like it is a combination of physical and chemical sun protection. It also claims to be photostable. I basically bought it because I remembered the recommendation from Cacaopack. ^__^ Look at how much product you're supposed to use in order for your sun protection to work effectively! I think it's generally true for all sun protection products (although Avene is the only one that is so specific about the actual amount to use). The good thing about this lotion is that it's not sticky at all, even though I apply so much, and it does not leave a white cast on my skin. And I read that it contains an ingredient that protects against a wide spectrum of UVA and UVB. I'm thinking I need to go back to get a few more of this while it's on offer. I haven't used it long enough but from my short usage, I think it does prevent my skin from tanning! So I'm thinking it is going into my HG list as well.