Can these bargain bracelets boost oxygen supply and immunity?

I said last week that I hoped the Sense about Science Ask for Evidence campaign would encourage me to contact companies to challenge some of the incredible advertising claims  I encounter on such a regular basis.

That morning, I had received a promotional email about an impressive discount on an apparently miraculous ‘Ion Balance’ bracelet which it was claimed could improve circulation and immunity by emitting negative ions. Could it really be true..?

Sense About Science launch Ask for Evidence campaign

Sense About Science is a charitable trust that works in partnership with scientific bodies, research publishers, policy makers, the public and the media. They aim to change public discussions about science and evidence and equip people to make sense of scientific and medical claims.

Their latest campaign, Ask For Evidence, backed by some high-profile performers, Professors and presenters, concerns an issue which is close to my heart: putting a stop to misleading claims about science and medicine.