However, it was only through technological advancements in the 1960s and 1970s that it became feasible to quantitatively (as opposed to qualitatively) measure metabolic profiles.
Con todo, só foi a través de avances tecnolóxicos nas décadas de 1960 e 1970 que foi posíbel medir en termos cuantitativos (e non cualitativos) perfís metabólicos.