The rules around donating depend on whether you have ever donated before.
Under 17 years of age
You can become a donor as soon as you reach your 17th birthday.
Under 66 years of age
You can start giving blood anytime up to and including your 66th birthday.
Aged between 66 and 70 years of age
If you have given at least one complete blood donation before, even if it was some time ago or outside of Wales, you can donate up until your 70th birthday.
Over 70 years of age
There is no upper age limit for giving blood, after your 70th birthday providing you are in good health, you can continue to give blood as long as you have successfully donated within the last 2 years.