the main issue with this kind of journalism is that it is too short to be true. Look at anglo-saxon journalists they are able to write more than 1000 words...
Same issue. But a little longer so probably truer.
Nevertheless the only source quoted is a book which author is an animal behavioural specialist Luc-Alain Giraldeau who backs his anti-paleo diet approach on the papers of Marlene Zuk who is herself totally engaged in a crusade against paleo-diet.
Indeed this author is only a contrarian and accessorily an anticapitalist when it comes to the nutritional supplement industry
This industry has to prove that its products are efficient but obviously we don't care of "avoiding profits". is Le Monde avoiding profits despite subsidies? No it is totally involuntary.
None of these sources is able to give the readers a balanced view.
What a pity in the continent of Descartes.