For decades, xylitol has been quietly woven into the fabric of sugar-free living, offering sweetness without the guilt of table sugar. Now, a large observational study tracking more than 17,700 people over six years has found that those with the highest xylitol levels in their blood faced a 57 percent greater likelihood of heart attack, stroke, or death — a finding that invites the human tendency to seek safety in substitutes to pause and reflect. The science stops short of declaring causation, but the pattern is consistent enough that researchers and clinicians are urging a more honest reckon