Hair silver (Ag) levels reflect environmental exposure to the element. However, the hair is commonly contaminated with Ag from hair treatments, swimming pools and hot tubs. Ag is not a essential … [Read more...]

Hair is a very good tissue for monitoring accumulated body stores of nickel (Ni). But, often hair can be contaminated with nickel from hair treatments and dyes. Ni is an essential element which is … [Read more...]

Uranium (U) in the hair typically reflects levels of U in other tissues in the body. But the hair may be externally contaminated by shampoos or hair products that contain U. U is very abundant in … [Read more...]

Thorium (Th) is a radioactive element with 13 known isotopes. Th232 constitutes 99% of the naturally occurring Th, and is the isotope Dr. Hull tests for. Th decays by alpha-emission to produce radon, … [Read more...]