Why genes matter
Genes exist inside all the cells that make up your body. They contain genetic code (DNA) and provide instructions for constructing proteins, which are the building blocks of our bodies and perform a huge variety of roles.
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Genes exist inside all the cells that make up your body. They contain genetic code (DNA) and provide instructions for constructing proteins, which are the building blocks of our bodies and perform a huge variety of roles.
The Manchester Marathon is one of the UK’s premier running events, famous for its fast, flat and friendly route. Join 25,000 runners taking on the 26.2miles as you’re cheered on by the incredible Mancunian crowds making for an unforgettable day!
Join #TeamRetinaUK for the iconic 2023 TCS London Marathon! Soak up the incredible atmosphere as you run from Blackheath to The Mall finish line where you’ll get your very own marathon medal.
Join 27,500 people taking on this fast and flat course past breathtaking scenery and iconic landmarks.
This stunning central London half marathon, takes in some of the capital’s world-famous landmarks on closed roads.
Join 15,000 people for an Old Trafford start and finish.
Back for 2023, the virtual TCS London Marathon lets you join our team close to home and get your marathon medal!
Clock up 100 miles on your bike with this virtual challenge.
RideLondon 100 is back! Take on 100 miles with Retina UK.
Join 2,000 adventurers of all experience levels & ages and walk, jog or run 25, 50 or 100km of the spectacular Jurassic Coast – a World Heritage Site.