Snickers Protein bar, with 18 g of protein, and Mars Protein bar with 19 g of protein, will retail in the UK for around £2.19 ($3.16). Each contains 200 calories.
“Protein consumption is on the increase and has made the transition from niche to mainstream,” said Michelle Frost, general manager for Mars Chocolate Drinks and Treats in a press release.
“Our bars combine great taste, familiar brands, clearly labelled protein content to meet growing consumer demand,” she added.
A rising category
According to Euromonitor International, UK sports-related protein product sales are projected to reach £358m ($373m) by 2018.
Market analyst Nielsen says sales of protein bars in the UK grew 58% last year to £22m ($32m).
Mintel research has also found 17% of UK consumers consume food or drink containing protein between meals.
ConfectioneryNews has asked Mars for further details and is awaiting a response.