ST. LOUIS — Post Foods, a subsidiary of Post Holdings, has acquired San Francisco-based Attune Foods. Founded in 2006, Attune Foods makes Uncle Sam high fiber cereals, Erewhon gluten-free cereals, Erewhon organic graham crackers and Attune chocolate probiotic bars. Financial terms were not disclosed.

“Attune Foods is strengthening our commitment to healthy living, whole grains, the gluten-free community and the Non-GMO Project with a new owner, Post Foods,” Attune noted in a posting on its web site. “While we’ll continue to operate independently with the same team in San Francisco, we wanted to be transparent about our newest supporters. Everything else stays the same: our people, products, recipes, ingredients and trusted certifications.

“In fact, our independent spirit and deep-rooted commitment to the natural foods industry is what attracted Post.”

Attune Foods had 2011 revenue of approximately $15 million.