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Those watches are so inaccurate that their use is not approved in any country in the world.
The technology is just not there yet.
The watches that measure blood glucose levels are so inaccurate that if you used it for treatment decisions --- You could die.
So again, Do not waste your money on one. It could kill you.
Blood monitoring watches, like continuous glucose monitors (CGMs), measure glucose levels in interstitial fluid (just under the skin), not directly in the blood. These readings can lag behind actual blood glucose levels, especially after eating, exercising, or taking insulin. For accuracy, you may need to confirm results Show Full Answer
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