00:00What if the real danger of smoking is not how much you smoke, but how young you start?
00:04A massive study from Seoul National University followed over 9 million adults.
00:09And the results are shocking.
00:11People who started smoking before age 20 had a much higher risk of heart attacks and strokes later in life,
00:17even if they quit.
00:19Even decades later, those who began before 15 faced the highest danger of all.
00:24Heavy smokers who started young had more than double the risk of heart attack.
00:28And nearly 80% higher risk of stroke compared to non-smokers.
00:32Here is the scary part.
00:34The risk stayed high even after researchers adjusted for how much they smoked overall.
00:39Why?
00:40Because young blood vessels are more fragile.
00:42Damage can begin in childhood.
00:44Early smoking may cause stronger addiction, long-term inflammation, and lasting harm to arteries.
00:50And another major study from Johns Hopkins found that even 2 to 5 cigarettes a day can raise your risk
00:56of heart failure by 50%.
00:58The message is clear.
01:00When it comes to smoking, the earlier you start, the more every single cigarette costs you.
01:05The sooner you quit, the better your heart can heal.
01:08See you as well.
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