Philip Kingsley Density Amino Acid Protein Booster 107gHair health can be impacted by multiple factors, such as poor nutrition, nutritional deficiencies, hereditary influences, stress, medication, over styling, and chemical treatments, amongst others. Amino Acids are an essential component of healthy hair as they combine to form proteins used by the body to build tissue cells, including those of your hair, skin, and nails. These proteins form the building blocks of your hair, keeping it strong and