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What is normal at your lab for RDW? Were any other numbers on the CBC outside limits?
I had asked what the normal range was for RDW at your lab. Every lab has its own values for what it considers normal based on the types of equipment they use.
At my lab a normal RDW is 11.5 to 14.7%, so at my lab your 15.58 is just above the higher level of normal. This normally indicates some kind of nutritional deficiency. Additional testing is used to determine what kind.
Normal fasting glucose level in a non-diabetic is 70-100 mg/dL. However, I see that you take metformin. Is that for diabetes? For a diabetic, fasting blood glucose should be between 70-130 mg/dL.
There is nothing in the two numbers to tell what is causing the nausea. Your GI doctor will need to determine that.
Please let me know what additional questions you have about this.