Blood donation can save lives, yet misconceptions about who can donate and whether it is safe continue to discourage people from coming forward.

Experts at the University of Texas MD Anderson Cancer Center have addressed four common myths surrounding blood donation, including concerns about age, safety, tattoos and overseas travel.

Myth 1: You are too old to donate

Being older does not automatically mean you cannot donate blood.

According to transfusion specialist Dr Joanne Becker, there is no upper age limit for blood donors in Texas, provided they meet the other eligibility requirements, including weighing at least 110 pounds and being well and healthy.

Older donors can therefore continue to contribute if they meet the required criteria.

Myth 2: Donating blood is unsafe

For eligible donors who follow the recommended waiting periods, donating blood or platelets is considered safe.

The body replaces the fluid portion of donated blood relatively quickly. Red blood cells take longer to replenish, while the iron lost through whole-blood donation generally takes about eight weeks to be replaced, often through diet.

Whole blood can generally be donated every 56 days, while double red-cell donations require 112 days between donations. Platelet donations are usually spaced about two weeks apart, with an annual limit of 24 donations at the centre discussed.

Myth 3: Tattoos mean you cannot donate

Having a tattoo or piercing does not permanently prevent someone from donating blood.

According to Becker, donors generally need to wait three months after receiving a new tattoo or piercing. The waiting period is intended to reduce the risk of infections that can result from contaminated equipment.

Myth 4: Overseas travel always stops donation

Travelling abroad does not automatically mean a person must stop donating blood.

Many geography-based restrictions have been lifted over time. However, some destinations can still result in a temporary deferral because of infection risks such as malaria.

The exact waiting period depends on where a person travelled or lived and the associated health risks.

Some health conditions can still mean a deferral

People may still be temporarily prevented from donating if they are unwell, anaemic, taking certain medications or receiving antibiotics for an active infection.

Eligibility rules can vary between blood banks and locations, so potential donors should check the requirements of their local donation centre.

Every eligible donor can make a difference

There may be no proven physiological benefit to donating blood, but experts highlight its potential psychological benefit.

For donors, giving blood is a simple way to help other people. Clearing up common misconceptions could encourage more eligible people to roll up their sleeves and contribute to the blood supply.