Passage Summary: The author argues that because healthy people's bodies can flush out extra salt without a blood pressure spike, they don't need to watch their salt intake.

Conclusion: Sodium restriction is only necessary for individuals who already have high blood pressure or whose bodies cannot process salt correctly.

Reasoning: Most people with normal blood pressure simply excrete excess sodium without experiencing a significant increase in blood pressure.

Analysis: To weaken this argument, we need to find a reason why healthy people should still limit their salt. The author assumes that if salt doesn't raise blood pressure *now*, it isn't doing any harm. A great way to attack this is to find an answer suggesting that high sodium has other negative health effects, or that it causes high blood pressure to develop gradually over time. Look for information that shows salt is a 'silent' danger even for those whose current blood pressure readings are normal.