insulin is a hormone produced by the pancreas/beta cells when you eat glucose(sugar) is in the blood stream in order for your cells to use the glucose for energy or store it insulin has to "unlock...
A photo resistor decreases in resistance as illumination increases. I don't believe there are any discrete components that accomplish what you are asking. You may need to use a photo resistor,...
Insulin resistance is treated by a healthy diet and exercise, weight loss if obese, endocrine hormone correction if unbalanced, quit smoking. Effectiveness of herbal remedies have not been researched.