The shed hairs are typically telogen hairs, which can be recognized by a small bulb of keratin on the root end. Whether the keratinized lump is pigmented or unpigmented makes no difference; the hair fibers are still typical telogen hairs.
People with Telogen Effluvium never completely lose all their scalp hair, but the hair can be noticeably thin in severe cases. While Telogen Effluvium is often limited to the scalp, in more serious cases Telogen Effluvium can affect other areas, like the eyebrows or pubic region.
Whatever form of hair loss Telogen Effluvium takes, it is fully reversible. The hair follicles are not permanently or irreversibly affected; there are just more hair follicles in a resting state than there should normally be.
My shedding stopped after about a month on oral minoxidil, i just recently ditched finasteride for dutasteride and losing a bit of hair but nothing like the oral minoxidil shed. Still to see results with oral minoxidil, it's been three months or thereabouts.
Im still in early days of dutasteride, i take 10mg oral minoxidil at night. I was shedding alot, everytime i washed my hair there were countless hairs, can't give you an exact amount but it was bad.