Key points from article :
Whichever the diet type an individual follows the benefits are short lived.
There's limited weight loss, improvement in blood pressure and cholesterol levels for a short time.
By 12 months into the diet weight, blood pressure and cholesterol levels go up again.
Unsure if following these diets would reduce risk of heart attack, stroke and early death.
Analysed 121 randomized controlled trials that involved nearly 22,000 participants.
Research by McMaster University in Canada published in the journal BMJ.
