Body Block: Four brilliant sunscreens and sun blocks

The first thing to know here is that there are two types of sun protection – chemical and mineral, or physical screens. Chemical are just that, a scientific formulation containing organic, carbon-based compounds such as oxybenzone, octinoxate and octisalate, which create a chemical reaction, converting UV rays into heat, and then releasing that heat from the skin.

Mineral, or physical sunscreens contain active, mineral ingredients such as titanium dioxide, or zinc oxide, and work by sitting on top of the skin to deflect and scatter damaging UV rays from the skin. They are often referred to as physical blockers.

To work effectively, chemical sunscreens must be applied at least 20 minutes before sun exposure, mineral products protect from the sun as soon as applied. Mineral screens are usually longer lasting, and less likely to cause skin irritation or clog pores. Historically, they have left a white-ish cast on the skin, appear chalky and opaque, and can be hard to wear under make-up, although formulas are improving. Chemical screens need to be applied more often, ideally every two hours.

Which works better? It’s really a personal choice, but in truth, the sunscreen that works best is the one you wear properly, apply liberally and top up frequently.

Some of our favourites…