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Poison Quote by Philippus Theophrastus

“There is no substance which is not a poison; all are poisonous. Only the dose determines.” quote by Philippus Theophrastus
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““There is no substance which is not a poison; all are poisonous. Only the dose determines.””

Philippus Theophrastus

About This Quote

All substances can be harmful; toxicity depends on quantity, not inherent nature.

In simple terms: Dose determines toxicity.

Key Takeaway

Quantity matters more than quality.

Themes

toxicity dose-response relativism risk assessment philosophy of science ethics

Mood

cautious analytical reflective

Type

aphorism scientific insight philosophical observation

When to use this quote

  • medical prescribing
  • environmental exposure
  • food additives
  • industrial chemicals
  • personal supplement use

Key Concepts

paracelsus principle chemical safety threshold effect dose‑response curve

Practical Applications

  • risk management
  • regulatory standards

Questions to Reflect On

  • How does this principle affect everyday decisions?
  • When might a low dose become harmful?
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