Phiten necklaces are made of titanium because this is a metal that conducts electricity. The idea is that stiff muscles and fatigue may be caused by disruptions in the flow of your body's bioelectric current. Bioelectric current just refers to the small amount of electricity running through your body (for example, nerves transmitting sensations or neurons firing synapses to process thoughts). As the claim goes, placing these pieces of titanium on the body will stabilize your current, thus helping your body run better.

N. Rasuli-Oskuii has written:

'Development of a programmable bioelectric signal simulator'

Lois Larson has written:

'The effect of the menstrual cycle on bioimpedance reliability' -- subject(s): Adipose tissues, Bioelectric Impedance, Body composition, Impedance, Bioelectric, Measurement, Menstrual cycle, Oral contraceptives, Water in the body

'Software for weavers' -- subject(s): Hand weaving, Computer programs

It generally measures the impedance of current through the body. It measures the opposition of the tissues in the body against the current discharges. This allows the calculation of various current frequency and their relative measurements, and are able to estimate the total body water weight. This data along with the individuals age, weight, sex and such and used in pre-derived equations to calculate fat % and such. The test's accuracy on the other hand may be questioned.

Duncan E. Woods has written:

'The experimental analysis and computer simulation of bioelectric referencing systems'