Blog & Articles
Plain-language notes on insulin timing, carb counting and everyday life with diabetes.
How long does Humalog last? In your body and once opened
Humalog starts working in about 15 minutes and keeps going for 2 to 5 hours. What changes that, and why an opened pen lasts 28 days out of the fridge.
Carb counting for beginners: a guide for insulin users
New to carb counting? What counts as a carb, how to read food labels, what a 15 g carb serving means, and the mistakes beginners make when counting for insulin.
Exercise and blood sugar when you take insulin
Why exercise can drop or raise blood sugar when you take insulin, how insulin on board affects your risk of a low, and why lows can come hours after exercise.
What is a CGM and how does it work? A plain-English guide
A continuous glucose monitor (CGM) reads your glucose every few minutes through a small sensor. How it works, how it compares to finger pricks, and time in range.
What is insulin on board? Active insulin, explained simply
Insulin on board (IOB) is the rapid-acting insulin still working in your body. How long it stays active, why it matters, and what insulin stacking is.
Why is my blood sugar high in the morning? 4 common causes
Blood sugar high when you wake up? How the dawn phenomenon, the Somogyi effect, insulin wearing off and late meals raise morning glucose, and how to tell them apart.