Between 70 mg/dl (3.9 mmol/L) and 92 mg/dl (5.0 mmol/L) . This is the finding of a considerable body of research. People whose blood sugar tests at this level do not develop diabetes over the next decade or longer.Those with supposedly normal blood sugars above 92 mg/dl often do.etween 70 mg/dl (3.9 mmol/L) and 92 mg/dl (5.0 mmol/L) . This is the finding of a considerable body of research. People whose blood sugar tests at this level do not develop diabetes over the next decade or longer.
The owners manual on every vehicle should state how often the manufacturer recommends that you tune up cars, but as a general rule it is every two years or 30,000 miles, whichever comes first. Driving under extreme temperature and weather conditions will make parts wear out faster, however.
Usually every six months to a year is sufficient for normal use. If your piano gets played a lot, you might need more frequent tunings, like every two or three months. Ideally your ear should be your guide. If some of the notes on your piano are sounding sour, it's probably time to call the tuner.