For the last five years, Standing Voice has done incredible work improving the health, education and prospects of people with albinism in East Africa. Socially ostracised, often denied access to education and healthcare, and, all too frequently, mutilated or killed for their supposedly magical body parts, many people with albinism can face short, brutal lives, confined to the margins of society.

Standing Voice was set up to change this. Its programmes aim to address all the myriad challenges people with albinism face in Tanzania - from supporting a network of skin cancer prevention clinics across the country and providing educational scholarships, to running community initiatives that nurture inclusion and operating global advocacy campaigns to overcome social stigma. Its work has been inspiring to witness, but there is much more to be done.

Our company, Zetteler, has been closely involved with Standing Voice for several years, and our founder Sabine Zetteler is a trustee of the charity. The Zetteler team has helped Standing Voice connect with creatives to run artistic residencies in Tanzania, and has worked to spread awareness of its life-changing campaigns here in the UK. Now, we're going in on the ground.

This summer, Kevin and India will be travelling to Tanzania to offer direct, hands-on support to Standing Voice's community projects and work directly with the people they help. Based at the Umoja Training Centre on Ukerewe Island set up by Standing Voice, they'll be working with Zetteler's visiting artists and makers Camille Walala, Yinka Ilori, Simon Sawyer and Alex Booker to run creative workshops with adults and children with albinism, as part of the centre's mission to help its community develop their skills, form lasting connections and find solace from the isolation and discrimination many have suffered throughout their lives.

That is why Team Zetteler's runners - Kevin, India and Anthony - will be spending a fair chunk of the morning on Sunday 20 May, attempting to navigate 13.1 miles of Hackney streetscape as quickly as their legs can move. It's a challenging run, sure, but nowhere near as challenging as the lives that Standing Voice changes every day. Please support them if you can - a small gesture in East London can make a big impact in East Africa.

Standing Voice works to end human rights violations against people with albinism in Tanzania. Albinism is a genetic condition that reduces melanin pigment in the skin, eyes and hair. People with albinism are pale, vulnerable to sunburn, and visually impaired.

In parts of Africa, people with albinism are being marginalised, mutilated and murdered. People with this condition are thought to be curses from God. Women with albinism are raped in the belief that their bodies cure AIDS. Witchcraft potions containing the body parts of people with albinism are meanwhile believed to be a source of wealth and fortune. This belief has caused 204 people with albinism to be murdered, and another 354 to be attacked and mutilated, across Africa since 2006.

Most victims have been children.