This article, written in English by Santos de Oliveira Cruz et al., speaks of a new hypothesis based on the fact that the lactate to pyruvate conversión can’t occur in the cytosol as tradicionally believed. The hypothesis of the intracelular lactate shuttle states that the lactate first enters in mitochondria and only then is metabolized.

The abstract of this article can be found in the Information section (https://www.laktate.com/en/information/basic-aspects/intracellular-shuttle-the-lactate-aerobic-metabolism/), where you will also find a link to access the original article, written in English.