But a large part of longevity is managing your glucose levels. As far as that goes Pepsi compared to fruit juice isn't crazy. Any sugar source will spike your glucose levels release insulin and so forth. Elevated glucose levels lead to reduction of proteins/fats and anything they can get their hands on building Advanced Glycation End products. These build up cause inflammation and which is the biggest driver for aging/age related illness. If you are going to drink something sugary fruit juice wins of course but both lead to the same end. I'd rather go for something sugar free or get a mio if you crave a sweet drink. Lemon water with Splenda is a good choice too if artificial sweeteners don't upset your digestion.

From the article: http://www.express.co.uk/life-style/health/821188/Healthiest-village-revealed-Pioppi-diet-food-live-longer

After studying the Pioppians, Dr Malhotra found it was their lifestyle that gave them many years of extra life. Key tips include using olive oil, not fearing fat but limiting intake of sugar and refined carbohydrates.