Hi
@DannyH, Sorry to read how you are struggling
A few things come to mind
- Do you check all high Libre readings with finger pricks. It is common that it over-reports when higher than about 10 mmol/l. This is because they are calibrated to be most accurate at "normal levels". Correction doses should always be taken based on finer prick readings
- Are you considering Insulin On Board (IOB) when dosing? IOB is the "unused" fast acting insulin which typically remains active for about 4 hours. A safe approximation is our body uses the fast acting insulin evenly throughout the 4 hours*. So, if you take a dose of 4 units, after 1 hour, 3 units are still active, after 2 hours 2 units are still active and after 3 hours, you still have 1 unit. If make a correction after 2 hours and do not take IOB into consideration, you will go too low.
- Do you increase your correction dose when your levels are high? I find I need 1.5 as much insulin when my levles are above 12 and 2x when my levels are above 16. This is because we become insulin resistant when our levels are high. The other thing to consider is that our bodies become resistant to all insulin so we may find our levels rise when high because our usual basal dose is not enough due to the insulin resistance.
- Have you tried eating less low carb. I find my body needs more than 30g carbs per meal. If I eat this low, I also need to dose for protein (which my body converts to sugar in the absence of carbs). As I found the insulin to protein ratio was different for different types of protein, I found it too complex and a higher carb level was easier to manage.
We are all different so the numbers I give above are for me so your doses and levels are likely to be different.
*In reality the activation profile is front loaded with a peak after about 30 minutes and trailing to the 4 hours. The approximation above is conservative to minmise risk of overdosing.