Those ‘only’ measure glucose levels. As the article says, this is the first approved device that monitors both ketone and glucose levels.

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crisnoble 6 hours ago | parent [-]

Ketones don't come from nowhere, they come from your body breaking muscles down in a last ditch effort to control sugars after they are dangerously elevated for extended periods of time, I'm talking 500+ over weeks. It's sort of like adding a "your car has been completely out of gas for one week" monitor to your "gas tank level" monitor.

	▲	ddorian43 6 hours ago \| parent [-]
		Um, no ? Ketones come from fat burning, not muscle. In T1D with no insulin, muscle break down from gluconesis will increase blood sugar in the blood even more. The absence of insulin also makes ketone production unrestricted, so you end up in ketoacidosis. Muscle is used when you don't have fat, or when you eat completely nothing (burn both fat & muscle). Like I've gained ~10KG of muscle while on keto diet. Blood sugar at 70-100 depending on scenario. Usually on the lower end.