For people with type 1 diabetes, eating a diet with less carbohydrate and more low-glycemic foods leads to lower insulin doses than eating a diet with more carbohydrate and high-glycemic foods,...
Mechanism
Synthesis from 1 study
Eating fewer carbs makes your body release more fat into the blood, which makes your muscles and fat tissue less responsive to insulin. Even though there’s less sugar to manage, your body still needs about the same amount of insulin because it’s harder for glucose to get into cells. Fast-digesting...
Most probable mechanism
When someone eats fewer carbs with slow-digesting foods, their body makes less insulin, which lets more fat break down into fatty acids. These fatty acids interfere with how muscles and fat tissue respond to insulin, making it harder for glucose to enter cells. Even though there’s less sugar coming in, the body still needs about the same amount of insulin to manage blood sugar because the tissues aren’t responding as well.
Reduced dietary carbohydrate intake lowers postprandial glucose excursions and decreases insulin demand
Lower insulin levels reduce suppression of hormone-sensitive lipase in adipose tissue, increasing lipolysis and elevating plasma free fatty acid levels
Elevated free fatty acids activate serine kinases in muscle and liver cells, leading to serine phosphorylation of insulin receptor substrate-1 and impaired insulin signaling
Impaired insulin signaling reduces GLUT4 translocation and glucose uptake in skeletal muscle and adipose tissue, inducing peripheral insulin resistance
Despite lower carbohydrate intake, increased insulin resistance necessitates similar insulin doses to maintain glycemic control
Less supported by current evidence, but not ruled out
Foods that break down quickly into sugar cause rapid spikes in blood glucose, which require more insulin to bring levels back down.
High-glycemic index carbohydrates are rapidly digested and absorbed in the small intestine
Rapid glucose absorption causes sharp postprandial hyperglycemia
Elevated blood glucose triggers increased insulin secretion to promote glucose uptake and suppress hepatic glucose production
Evidence from Studies
Supporting (0)
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Contradicting (1)
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Effects of Dietary Carbohydrate Concentration and Glycemic Index on Blood Glucose Variability and Free Fatty Acids in Individuals with Type 1 Diabetes
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