500
About as strong as copper wire of the same diameter, one of these can support up to 100 gms in weight.
What is human HAIR? (Those of the average person, having about 100,000 to 150,000 hairs, could support the equivalent of 2 African elephants !!).
To maintain good hair health, take sufficient biotin (a B vitamin, a.k.a. vitamin H) and folic acid (another B vitamin, a.k.a.Vitamin Bc).