With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Heavy metal poisoning from consuming fish oil supplements is a concern, however, because heavy metals (mercury, lead, nickel, arsenic, and cadmium) selectively bind with proteins in the fish oil, while such an accumulation of metals is highly unlikely in the flesh.
text_B: Since heavy-metal toxicity is something that occurs slowly over a lifetime, in even the worst case scenario, could fish-oil supplements still be taken by the elderly without undue worry?
YES.