Mexico’s ancient ‘caviar’
Nothing in the article suggests “ahuautle” being healthier than meat, only very, very rare to find.
And BTW also the original title seems a bit off, as caviar is easily available, though at a high price.
As a side-side note (more curiosity than anything else) the OP (MiriamWeiner) has 370 submissions (all for bbc.com articles) and 0 comments, could it be a bot of some kind?