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When your body isn’t able to get the energy it needs from blood sugar, it starts burning other things for fuel, which can lead to weight loss even if you’re not dieting or exercising, Gupta says.
On the other hand, insulin resistance can make you hungry and cause you to gain weight instead of losing it.
6. Certain areas of your skin are darker
High insulin levels can speed up the rate at which skin cells reproduce, leading to a condition called acanthosis pigmentosa. This occurs when the skin on your neck, under your arms, or in the creases of your elbows begins to darken and take on a smooth or velvety feel, Gupta says.