Skinceuticals Sheer SPF 50

"A groundbreaking first-to-market mattifying fluid with transparent finish, this paraben-free, all-physical filter sunscreen provides increased protection in an ultra-sheer texture for all skin types, even very sensitive. Sheer Physical UV Defense SPF 50 offers the photoprotection of trusted broad-spectrum, physical filters, zinc oxide (Z-COTE) and titanium dioxide, and is enhanced by artemia salina, a plankton extract, to increase the skin’s defenses and resistance to UV and heat stress.  The unique ‘shake then apply’ action assures even distribution of active ingredients in this silky sheer fluid that dries quickly and leaves no residue."-Skinceuticals 

I wanted to love this, but the white cast is ridiculous and makes my foundation look HORRIBLE.  Great UVA/UVB sun protection with titanium dioxide and zinc oxide.  It took some time to get used to it and find a way to get rid of the white cast- I've given up on this SPF.  I mixed moisturizer and this spf in the palm of my hand to warm it up and it spreads easily onto skin.  The fact that it is liquid makes it lightweight, easier to absorb and less likely to clog pores.  I had a few clogged pores on my neck and jaw. Suitable for FAIR, sensitive, oily, acne prone skin.  I do NOT suggest for brown skin (the white cast is terrible.)

Pros:

• Provides non-chemical UVA/UVB protection (contains zinc oxide & titanium dioxide)
• Matte Finish.
• Non-comedogenic and Paraben free
• Liquid formulation

Cons:

• Leaves a very noticeable white cast on brown skin (try mixed with moisturizer.)
• Contains dimethicone (can prevent skin from breathing and breakouts.)

Update 5/11/12:  This SPF must be mixed with a moisturizer to diminish white cast.  I tried mixing  equal parts spf & moisturizer, but it still leaves a unnatural white cast on my bronze skin.

$28-$32

50 ml

Bottom line: A good SPF for fair skin tones.

*Daily (that means rain or shine, indoors & outdoors) use of SPF 30+ will prevent sun damage:age spots, hyperpigmentation, fine lines and wrinkles and the general visual signs of aging.  SPF should be reapplied  every 2-3 hours and MUST be reapplied at the beach or during water activities.  NO SPF IS WATER RESISTANT OR WATERPROOF.

*Update: 1/22/13
I experienced irritation, a white/blue cast and clogged pores.