Bolusing for Potatoes: A Type 1 Diabetes Guide

Understanding Potatoes and Carbohydrates

• 🥔 The average American consumes about 49.4 pounds of potatoes per year, including frozen forms like French fries.
• 📏 A medium potato contains approximately 18-22 grams of carbs, but portioning by cup is often easier for starchy foods.
• 🥄 A one-cup portion of mashed potatoes is estimated to contain around 30 grams of carbs.

Factors Affecting Blood Sugar Response

• 📈 Potatoes, especially baked or mashed, have a fairly high glycemic index (around 85-90 for baked potatoes).
• 🍟 Adding fat, such as in French fries with sour cream or butter, slows down the glycemic hit, lowering the glycemic index.
• ⚠️ The presence of fat and protein in a meal, like a loaded baked potato or a meal with steak, can significantly alter the need for upfront insulin and may necessitate an extended bolus.

The Meal Bolt Strategy for Bolusing

• 🎯 The Meal Bolt formula (Measure, Evaluate, Add base units, Layer correction, Build bolus shape, Offset timing, Look at CGM, Tweak for next time) provides a framework for bolusing.
• 📊 When bolusing for a meal with multiple components like chicken, potatoes, and green beans, focus primarily on the carbohydrate impact of the potato while considering other components.
• ⏳ For meals with significant fat, like a loaded baked potato, consider adjusting the pre-bolus and using an extended or secondary infusion strategy to manage the delayed rise in blood sugar.
• 🔍 After bolusing, monitoring the CGM is crucial to observe the blood sugar curve and identify any fast spikes, delayed rises, or lingering effects from fat and protein.
• 💡 The final step, tweak for next time, involves reviewing what was eaten, the insulin timing and dosage, and the resulting blood sugar curve to inform future bolusing decisions.