The Nok culture thrived in central Nigeria from 1500 BCE to 500 AD. The were well known for their terracotta figurines and iron working.
Little is known about their diet, however. The acidic soil in the Nok territories did not preserve much organic material.
Fortunately analysis on ancient pottery has shed new light on their diets.
Summary: The use of chemical analysis on pottery vessels has yielded new insights into ancient cultures. [See posts below.]
https://phys.org/news/2022-04-chemical-ancient-west-african-pots.html