What hair cannot measure (but is often claimed)
- Intolerances
- Vitamins
- Amino acids
- Absolute mineral deficiencies

Analytical Research Laboratories — founded in 1974 by the renowned biochemist Dr. Paul C. Eck — with one clear mission: to develop the most precise health test in the world.
ARL is to this day exclusively specialized in hair mineral analyses — no blood tests, no urine samples, no side projects. This consistent focus delivers unmatched accuracy. It is the only lab in the world besides Trace Elements that does not wash the hair before analysis — a decisive factor, since washing causes mineral loss and distorts results.