Also known as rock samphire or cirthmum, sea fennel is a flowering plant is native to coastal cliffs. Rich in antioxidants and vitamins, its extracts can help as a protective barrier when applied to the skin.

You may not like stepping on seaweed when you’re at the seaside, but those brown fronds are your best friend. Packed full of youth-boosting nutrients, minerals and vitamins, they help revitalise worn-out skin.