It's not necessarily a contradiction. Example: we used to get regular doses of minerals from our water supply. Today, we largely filter these minerals to make "

It's not necessarily a contradiction. Example: we used to get regular doses of minerals from our water supply. Today, we largely filter these minerals to make "hard" water "soft." Doing what our ancestors did ≠ ingesting what our ancestors ingested. Supplementation can close these sorts of gaps.