BARNSLEY donors are wanted to donate plasma which could help treat people with genetic conditions.
Plasma is a yellow-ish liquid in your blood that carries platelets, and red and white blood cells around the body.
It also contains more than 700 proteins which can be separated from the plasma to make medicines.
The medicines can help treat genetic conditions, and rare immune disorders.
Donor centres in Barnsley are now taking plasma donations.
If you would like to sign up to be a donor, phone 0300 1232323.