they do, they are just smaller because they are smaller and generally do less muscle building activities. Also they have different hormones which affects muscle growth.

Red Muscle is suited for endurance activities.

a muscle pimple

LA Muscle, a UK-based company, makes muscle building and weight loss supplements. They do not have a muscle on their Facebook page at this time. However, since they do work in muscle building, they may occasionally use a muscle in their advertising.

Muscle building improves your posture, body functions, circulation, metabolism and your skeletal structure.