Choline, which is converted into acetylcholine, is found in many foods, including:

    Beef liver.
    Eggs.
    Beef top round.
    Roasted soybeans, canned kidney beans.
    Roasted chicken breast.
    Cod.
    Cooked quinoa.
    Cooked shiitake mushrooms, boiled broccoli and Brussels sprouts.
    Milk (1%), nonfat vanilla yogurt.

A note from Cleveland Clinic

Acetylcholine (ACh) is an important neurotransmitter that plays a role in brain functions, such as memory, and body functions, such as muscle contractions to move your muscles. Low levels of acetylcholine are associated with memory issues and muscle disorders. Cholinesterase inhibitors are used to treat Alzheimers disease and myasthenia gravis. The benefits of a choline supplement have yet to be fully determined