Daylong actinica will protect you from the harmful UV radiation that is part of sunlight and will prevent the development of non-melanoma skin cancer. This was proven by a 2-year study carried out on patients that were highly susceptible to the development of non-melanoma skin cancers (actinic keratosis, basal cell carcinoma & squamous cell carcinoma). Daily usage of Daylong actinica proved to be effective in the prevention of actinic keratosis and squamous cell carcinoma. Therefore Daylong actinica is essential prevention for people who are at risk from non-melanoma skin cancer (NMSC). It protects from both UVB and UVA rays. It is waterproof and contains photostable broadspectrum filters.
You cannot beat the protection this sunscreen offers and apart from all research and bibliography, backing its potency there is my experience:
I have melasma, many years now. With hydroquinone+tretinoin treatment (2004) and sunscreen everyday use, it subsided a lot. After giving birth (2006), it almost faded (a mystery yet to be solved!), but every summer it comes raging on my face, no matter how many buckets of suncreen do I slather on.
Now I discovered this (a sample was given to me in Athens Dermatology Hospital) and decided to give a full bottle a try.
Last Sunday, I was at the beach with Actinica on but with my hat missing. We spent the whole day at the beach, it was hot and the sun was intense and I was sure to come back to a face full of dark spreading blotches......NOT A SINGLE ONE!....NOT EVEN A GLIMPSE OF DARKENED PIGMENTING...Nothing!
I live in Greece and I try to use the best european sunscreen I can find. I alternate a lot, so I can hit the best. I think this is it.
Cosmetically-wise, it is a little sticky and heavy (no need for an extra moisturiser - after all you apply this on bare cleansed skin to get full protection), but with the protection it offers, this is my choice of suncreen this summer. Period.

Ingredients
Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Ethylhexyl Triazone, Isoamyl p-Methoxycinnamate, Ethylhexyl Methoxycinnamate, Methylene bis-Benzotriazolyl Tetramethylbutylphenol, Butyl Methoxydibenzoylmethane, Propylparaben, Methylparaben, Excipient

UPDATE 15/7/2009: I've been using it for almost 2 months everyday, I am very very impressed! No darkening (which is a first), no breakouts, no irritation!!!!!! It is mid summer with intense sun and temperatures of 35 degrees Celcius and my dark spots have not yet made an appearance!!!! I will update again after my 2 week vacation in August. continued >>