@DoubleD Hard to tell what specifically points to.
He talked about how before ice age where we ate mostly meat we had really better bodies and health by skeletal remains.
The marking would be signals of worse health after ice age where we started agricultural age and how it brings negative markings on our skeletal remains like bad teeth worse jawlines and general health that can be found on skeletal remains.
https://www.annualreviews.org/content/journals/10.1146/annurev.an.24.100195.001153
@Stahesh I will agree about healthier dental records for sure. Often the conclusion about what was in the diet is based on the dental records. Higher consumption of grain results in sugars being left on the teeth which in turn means more tooth decay. Healthy skeletal remains points to more consumption of dairy though, not just meat though it stands to reason that you'd have one with the other.