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• BMI measure is kg/m2; the normal range is 18.5–24.9.
• Waist circumference should be less than 31.5 inches for women and less than 35.5 inches for men.
• Haemoglobin for women should be over 12 to 15.5 gm/dl; for men between 13.5 and 17.5 gm/dl.
• Fasting blood sugar should be under 100 mg/dl, 100–125 is considered prediabetes; more than that is diabetic; hba1C or three-month average should be between 4 and 5.6 per cent.
• Ferritin levels range between 12 and 300 ng/ml for men and between 12 and 150 ng/ml for women.
• Vitamin d levels of under 20 ng/ml are considered deficient; between 40 and 60 ng/ml are ideal.
• Vitamin b12: under 200 pg/ml is borderline deficient; between 200 and 950 pg/ml is normal.
• Crp is measured in milligrams per litre. Normal levels are usually below 3.0 mg/l.
• Tests for celiac disease are tissue transglutaminase antibodies (tTG-Iga) tests; a negative result means
that the person does not have celiac disease.
• People with non-celiac gluten sensitivity (NCGs) either have symptoms similar to celiac disease or present a wide range of atypical symptoms, most of which resolve when gluten is removed from their diet. There is no specific blood test for NCGs; one needs to first rule out celiac disease, then do a food intolerance test, which includes gluten and other common allergens, such as milk, eggs and nuts. as can be seen from many of the cases, if a patient’s finances do not support expensive testing, a simple elimination process and food challenge can reveal a great deal to the diet detective.



Here comes and end of chapter - 13