With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Heavy metal poisoning is highly likely if fish-oil supplements are overconsumed in extreme amounts, however, because heavy metals (mercury, lead, nickel, arsenic, and cadmium) that selectively bind with protein in the fish flesh can leach into the fish oil.
text_B: Would a warning label that reminds users to take fish oil supplements only in their recommended doses be a sufficient precaution (or perhaps even an unnecessary one) given the level of risk?
YES.