1. A high calcium score in your 30s and 40s predicts death decades later In a JAMA Cardiology analysis of 12,847 adults aged 30–45, a coronary calcium score in the top 10% for age was linked to 2.6x the risk of cardiovascular death and 3.7x the risk of coronary death over about 22 years, compared with a score of zero. Modeled 30-year coronary mortality was 3.0% vs 0.6%. Takeaway: if you're young and your calcium score is high for your age, that's a reason to act early, not a reason to wait. Read it 2. Vaping may dull your blood vessels' ability to relax, even in healthy young adults A JAMA Cardiology lab study compared 58 healthy adults (average age 26). Daily nicotine vapers had lower flow-mediated dilation, a measure of how well the vessel lining (the endothelium) widens when blood flow increases, than non-users: 5.5% vs 8.3%. Their peak fitness was also lower. Their vessel function was close to the cigarette smokers' (4.4%). Takeaway: the endothelium is one of the earliest places cardiovascular damage shows up, so "healthy and young" isn't a free pass. This was small (17 vapers), a single snapshot in time, and can't prove cause and effect. Outside experts have cautioned against over-reading it, and other evidence suggests smokers who switch to vaping see improved vessel function. Still, the message holds: if you don't smoke, don't start vaping. Read it | TCTMD coverage 3. A rising calcium score on a statin may mean healing, not failure In the CAUGHT-CAD analysis (JACC: Cardiovascular Imaging, 338 people followed 3 years), statin treatment shifted plaque toward denser, more stable calcium while the softer, riskier plaque shrank, most of all with LDL-C lowering of 30% or more. Takeaway: don't panic if your CAC number climbs after starting a statin. The type of plaque matters as much as the score. Read it