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Growth factors

Growth factors are substances that promote the health and function of cells and tissues in the body.

Birmingham

Great Birmingham Run Half Marathon 2025

With a carnival atmosphere and the passion and spirit of the runners. this is a race like no other. Expect inspiring sights, iconic landmarks and incredible support all along the route. Join #TeamRetinaUK and experience it yourself!

Bristol

Great Bristol Run 10K 2025

If stunning views, inspiring history and graffiti murals are your thing, then this is the race for you in 2025. With a flat course and thousands of runners taking to the streets, it's a fantastic event to be a part of.

Paris Marathon 2025

The Paris Marathon, which sees more than 60,000 people take part yearly, is the marathon with the second-most finishers in the world, behind the New York City Marathon. Fancy taking on an iconic race in aid of Retina UK? We’d love to hear from you.

Manchester

Great Manchester Run 10K 2025

Join #TeamRetinaUK in the centre of Manchester for a hugely popular race, back for another year in 2025. With a flat course and thousands of runners taking to the streets, it's set to be another fantastic event.