但这个值的确不是越低越好。我总是看最佳值。

value能小于正常范围最低值的人肯定本身有问题。这篇文章是找了不同值的各类人做的研究, 包含正常健康的人。

 

 “normal” doesn’t necessarily equate to optimal if you’re interested in preventing disease.

Using a multivariable adjusted quadratic spline with HbA1c=5.2% as the cut-point, low and high HbA1c values were associated with an increased risk of all-cause mortality among individuals without diabetes.

 

 

Here is another article: 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4603057/