Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Familial hypercholesterolemia ?
    ### Response:
    What are the signs and symptoms of Familial hypercholesterolemia? Signs and symptoms in individuals with the autosomal dominant form of familial hypercholesterolemia (FH), also called the heterozygous form, may include: Men who have FH may have heart attacks in their 40s to 50s, and 85% of men with the disorder have a heart attack by age 60.
    