My ratio for breakfast is 1 unit to 30g but what if I only want 10g? Surely if I inject 1 unit I would go hypo and if I don't inject any I would go too high?
If you're not using Novorapid insulin pen cartridges and using Humalog or Apidra instead, you will be able to use a Lilly pen that delivers in half units. These are quite good and you could use 0.5u for 15g carb