The back-garden pharmacy

Calendula (Calendula officinalis)

What is it? Bright orange annual pot marigold (not to be confused with African, French or Mexican marigolds). Its chemical constituents include flavonol glycoside, whichhas an antioxidant effect.

How does it help? It can relieve pain and swelling of skin conditions including acne, sunburn, eczema, grazing, scalds and insect bites.

How do I use it? Rub flowers and leaves on your skin. 

Other benefits? An infusion of its fresh flowers promotes sweating and reduces fever.

What's the evidence? ‘The best evidence rests with its use as a topical cream or ointment,' says Dr Mark Atkinson, one of the UK's leading integrated medical doctors and author of 'The Mind Body Bible' (Piatkus, £12.99). ‘It's excellent for promoting the healing of wounds and for settling the inflammation of nappy rash in babies.'

Quick fix? Try Nelsons Calendula Cream (£4.15, 30g), from Boots, Holland & Barrett and all good pharmacies.