Convenient and high in protein, canned tuna is a go-to food for many, but is it a healthy choice? Registered nutritionist Nicola Shubrook investigates. Interested in trying our FREE 7-day healthy diet ...
Tuna is a large, muscular fish with flesh that ... an oxygen-storing protein found in muscle. Myoglobin breaks down quickly when heated. Thus, cooked and canned tuna looks greyer than raw tuna.