Melanin is the pigment that determines the colour of your skin — skin pigmentation occurs when melanin production in the body goes awry. When overproduced, skin gets darker than its normal tone and it's called hyperpigmentation. When it's underproduced, skin gets lighter than its normal tone and it's called hypopigmentation. Geddit?

The ingredient that's taken the pledge to combat acne no matter what the skin tone or type. It isn't afraid to penetrate and invade the deeper layers of your skin to do its job, making it one of the most effective acne warriors out there. Oh, and even though its an 'acid', its 100% skin-safe so you can lose that frown.

This is the seal that brands use to indicate that their products contain relatively fewer allergy-producing substances. However, it's also true that 'hypoallergenic' has NO agreed-upon legal definition. So best to be safe and sample your products, hon.

Short for potential hydrogen, the pH scale ranges from 1 to 14, with 7 considered neutral. While the lower levels are acidic, the upper numbers are alkaline. Fun fact — for your skin cells, the magic number is 5.5... that's when your skin functions as a true protective barrier. Cue to look for products whose pH level matches your skin's pH level.

The protein that makes 80% of the skin — it is what lends the skin firmness and keeps wrinkles at bay. In other words, what we're praying to God for all day, erryday!

These are fine lines and wrinkles around the corner of our eyes (resembling a crow's feet). Causes? Sun damage, hormonal changes and even smiling! While crow's feet can't entirely be healed, it can be helped with an eye cream for starters.