The retail chain claims to provide fresh, healthy food at affordable prices, and operates more than 60 locations across the US.
TSG said the move would help fund MFF’s expansion into new markets, enhance its brand and promote further development.
MFF is led by Mario Mendias, who founded the company in 2006, and Anthony Milton.
Blythe Jack, managing director at TSG, said, “We are delighted to partner with Mario and Anthony in what is an especially exciting and proven successful approach to bring good eating and nutrition to the tables of individuals, including those seeking to control their weight and those desirous of generally improving and maintaining their health.”
Jack, who has spearheaded recent investments for TSG in the health food retail and colour cosmetics sectors, was promoted to managing director and partner at the start of 2013 alongside Robyn Lawrie Rutledge.
TSG is currently investing from its $1.3bn sixth fund, which closed in November 2011.
The firm focuses on investments in the branded consumer sector, and has more than $2.9bn of equity capital under management.
Previous deals include investments in vitaminwater, PopChips and Smart Balance.
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