I did the big chop (mid-length to pixie) due to hair loss. Its returning, growing slowly but the crown is still shockingly thin. Its texture has even changed and now its dry, dull and lifeless. I began using Pantene thickening treatment but when I do my scalp will actually ache all day. Is this product safe?..Its number one ingredient is alcholdenat. What is this and can it damage delicate thin hair that's very dry?.