Different methodologies of neutron activation analysis (NAA) are now available at the Technological and Nuclear Institute
(Sacavém, Portugal), namely Compton suppression, epithermal activation, replicate and cyclic activation, and low energy photon
measurement. Prompt gamma activation analysis (PGAA) will be implemented soon. Results by instrumental NAA and PGAA on environmental
and nutritional samples are discussed herein, showing that PGAA — carried out at the Institute of Isotope Research (Budapest,
Hungary) — brings about an effective input to assessing relevant elements. Sensitivity enhancement in NAA by Compton suppression
is also illustrated. Through a judicious combination of methodologies, practically all elements of interest in pollution and
nutrition terms can be determined.