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Yes, blood tests can detect smoking through cotinine levels, a nicotine metabolite that stays in your system for days. These tests reveal smoking habits with high accuracy, helping doctors assess…

Yes, blood tests can detect THC (tetrahydrocannabinol), the active compound in marijuana, typically for 1-2 days after use in occasional smokers and up to 7 days for regular users. Blood…

No, a 12-hour fasting blood test doesn't cause high sugar levels; it reveals your body's baseline glucose management. If results show elevated fasting blood sugar, it indicates underlying metabolic issues…