Hypos and heart damage

I'm sure that mild hypos (i.e. above 3.5) are perfectly fine, since the reference range for nondiabetic people is 3.6-7.8.

This is the first paper Google found on the subject: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3361183/
It appears to be a meta-review (a review of multiple research papers).
The conclusion starts ...

@helensaramay - be careful with your cherry picking of conclusions. I'm familiar with that paper and many of the studies it draws from focus only on T2. The other part of the conclusion says:

More aggressive glycemic control should therefore be a goal among younger patients without substantial CVD in order to prevent later microvascular complications, and older patients and those with co-morbid conditions such as coronary artery disease, dementia, cerebrovascular disease, and renal disease should maintain the best glycemic control possible while also preventing significant hypoglycemia.

Click to expand...

Or in other words, the evidence suggests that in younger, healthier patients without long term conditions, tight glycemic control, i.e. avoiding highs and therefore having some associated hypos is more beneficial that just avoiding hypos altogether, compared with those who already have co-morbid conditions.

As with all of these things, YDMV.