we are a wholesaler of hair tek hiar fibers.Many times Hair-Tek Hair Building Fibers are compared in questions to Toppik Hair Fibers and other leading brands. Hair-Tek Hair Building Fibers are unlike any other product on the market. Our fibers are made here in the United States of America and are far more superior to the competition. Because our fibers are smaller in nature, Hair-Tek hair Building Fibers attach to each natural hair follicle allowing for a more natural, fuller looking appearance. Unlike Toppik, HairTek hair Building Fibers will not fall to your scalp or appear dull in color permitting optimal coverage all day all the while going undetected. The makers of Hair-Tek do not claim to add Keratin to our formula. The primary component of human hair fiber is keratin. Keratins are proteins, long chains (polymers) of amino acids. Keratin proteins form the cytoskeleton (miniature skeleton within a cell) of all epidermal cells. Keratin filaments run within a cell from the inside of the outer membrane to weave a "basket" around the nucleus of the cell. Keratins are a principle part of the cells in the epidermis, hair, nails, feathers, hooves, horny tissues and the enamel of teeth. Keratin cannot be produced in a laboratory. In hair fiber, keratin proteins comprise 65-95% of the total hair fiber by weight. Each molecule of keratin is very small - about 10 nanometers across. To give you a sense of how small that is, 10, 000 keratin molecules lined up side by side would cover the width of the average terminal scalp hair.