Ay, FBS (fasting blood sugar) na 4.33 is actually on the low side, mamsh, normal range is usually around 5.0 to 5.9 mmol/L depende sa lab standards, kaya I'd really suggest asking your doctor about this one since it could mean something or pwedeng naman i-retest lang. A few of my mum friends had similar concerns and naging okay lang after follow-up tests, pero better safe na mag-consult na especially kung may symptoms ka like dizziness or something.