The colour of farmed salmon comes from adding an antioxidant to their feed, with benefits for everyone

Salmon's distinctive colour comes from carotenoids in their diet. (Shutterstock)

A barrage of messages from social media influencers, along with other online blogs and articles, have claimed that farmed salmon are bad for you because the fish are fed dyes to turn their flesh red.

Some have claimed that farmed salmon is naturally gray, suggesting they are malnourished, and consumers should avoid eating it for this reason.