So 1 unit of insulin drops blood sugar 2-3 mmol ok, why is it I use that method my sugars are highish but when i do 1 unit of insulin drops blood sugar by 1 my sugars ars are brilliant.
Everyone is different, so you may need a different amount to what others need, also, when higher 1 unit may have less effect, i know it makes less of a difference to many when higher.
Also it'll be the novorapid you use for corrections - but you mentioned both it and levemir in your thread title.
Edit also note that Novorapid can take its fine old time for some, when I was still on it it could take 4-5 hours at times