14/04/2026
The 15/15 rule is a lifesaver for teaching how to treat lows, 15 g fast carbs, wait 15 minutes, recheck. Simple. Memorable. Safe.
But here's the part every T1D parent learns quickly:
Not every child needs 15 g.
β¨ Babies and toddlers may only need 1-3g
β¨ School age kids often need 5-10g
β¨ Teens may need 15-30g
β¨ Activity, insulin on board, body size, metabolism, insulin sensitivity or resistance, hormones, digestive speed, rate of glucose drop, illness and stress all change the picture.
The rule gives us a framework- treat fast, recheck, adjust- but your child's body tells you what actually works.
There's no "breaking the rule."
There's only personalising it for your child or teen. π