Alpen is a line of muesli varieties manufactured by the Weetabix cereal company of Kettering, Northamptonshire, England.

[2] Alpen is a whole grain muesli cereal consisting of rolled oats, fruits and nuts.

[2] It appeared in the early 1970s in Canada and then in the US in the 1990s after Weetabix established a partnership with natural foods manufacturer, Barbara's Bakery.

In North America, Alpen No Added Sugar and Alpen Original are mainstays in U.S. natural food stores and Canadian grocery stores.

As a brand extension and a reaction to consumer appetite for whole grain snacks, Weetabix introduced Alpen whole grain cereal bars, which include varieties of several fruit flavours.