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2026 UK Comparison: CO Breath Monitors vs Saliva Cotinine Home Tests — Which Is Best for Tracking Your Switch from Smoking to Vaping?
If you’re switching from smoking to vaping, CO breath monitors and saliva cotinine tests each offer different insights: CO gives near‑instant evidence of recent combustion, while cotinine reflects nicotine exposure over days. This guide explains how both work, their pros and cons, and practical recommendations for monitoring your progress in the UK in 2026.
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