Worst tier · Extra virgin olive oil

Bertolli Extra Virgin Olive Oil Rich Taste

Caution pick, not a fresh accusation: historical UC Davis issues plus weak current harvest and phenolic transparency.

AvoidUseful as a caution example, but the evidence here is much weaker than the top-podium proof stack.

Why it ranks

I kept Bertolli only as a cautious mass-market reference point, not as a hard current worst-oil verdict. The defensible evidence is mostly historical: the UC Davis Olive Center supermarket study and the broader pattern that blended supermarket EVOO rarely behaves like fresh early-harvest high-phenolic oil. That means the certainty is lower than for the oils on the podium.

Highlights

Shows the gap between old supermarket EVOO norms and current transparent high-phenolic leaders
Mass-market availability makes it a familiar comparison point

Caveats

Historical UC Davis 2010 issues should not be overstated as proof about every current batch
No current batch-specific phenolic number verified in this run
Official product-page image is now verified, so the caution card is visually identifiable
Low harvest transparency compared with the best-in-class oils above