Sink your teeth into today's top stories from around the globe.

• Viva la carbs! A Swedish study that's 25 years in the making says the low-carb diet increases blood cholesterol. - The Atlantic

• You can now pay for your Mudslide and loaded potato skins at T.G.I.Friday's with your smartphone. This is the first casual-dining chain to offer such technology. - NRN

• Craving zzz's? You're probably also craving pizza. New research explains why tired folks want unhealthy fare.  - Time

• Should restaurant owners get a cut off tip? An Ontario Member of Provincial Parliament says absolutely not, and introduced a bill that would prohibit such. - Canada.com

• Doritos have deliciousness down to a science. - Serious Eats