If you have dry skin, your skin is likely to mark during the day. To make your skin feel more comfortable and avoid this "cardboard" effect, but also to boost your skin's radiance, opt for Ilia Super Serum Skin Tint SPF30, a lightweight foundation that's easy to apply and leaves a luminous finish on the skin.

Powder or cream? Both are suitable if you have normal skin. It's just a question of what finish you want: glowy and shiny or matte and controlled. Our favourite foundation with a fluid texture for a luminous finish? Ilia True Skin Foundation, a foundation with a bare-skin effect and adjustable coverage for a finish that looks almost Photoshopped.

You have ivory, fair, light, medium, matt or black skin, but do you know your skin tone? Because it's this precise point that will help you find the foundation colour best suited to your skin tone.  Pink, golden or neutral? Here's how to determine them: 

• You have pink undertones if: your skin reddens easily at the slightest difference and the veins on your wrists tend to be purplish. Another clue? You sunburn easily.

• You have golden undertones if: the veins on your wrists are green and you tan quite well. You don't have pink undertones, but rather yellow/peach.

• You have neutral undertones if: you can't tell the colour of your veins? They're both purple and green, aren't they? You're neutral ;-)

And when in doubt between two shades, we recommend you opt for the darker, neutral shade. And to find the perfect shade from our selection of foundations, check out our shade guide.