non diabetic bg 160

It's not uncommon for a healthy person's blood sugar to rise that much straight after food. But if it goes much higher or stays there a while then there can be a concern.

(Note for others: 160mg/dL is 8.8mmol/L.)

 

The important questions are a] What exactly had your friend eaten or had to drink in the hour or so before testing?
b] What was the blood sugar level before eating (which presumably you don't know)?
c] What is it 2 hours after eating (and is it more than 2.5 mmols higher than it was before)?
d] Does your friend have any other readings to compare it to (one reading tells you very little)?
e] How clean was i] the strip ii] your friend's hand/finger?
You can't draw any conclusions unless it is sky high.