Destroyed nicotine, protecting hearts at risk

• At risk, prior to a breakthrough?
• About to take the plunge perhaps, mixing nicotine with heroin
• Once hit in crash, vulnerable
• Nicotine misused outside hospital in a risky location

Wikipedia Word definitions in Wikipedia
On Thin Ice is a documentary following a team of three consisting of Ben Fogle , James Cracknell , and Ed Coats in their race across Antarctica to the South Pole . The series covers the whole experience, beginning with training efforts in Switzerland and ...

Wiktionary Word definitions in Wiktionary
a. (context idiomatic English) In a dangerous, hazardous, or delicate situation; at risk.