by Mary Gawon
(Bonny iland, Porthacourt, Nigeria)
QUESTION AND FOLLOW-UP:
By Mary Gawon, Bonny Island, Port Harcourt, Nigeria
I stopped eating complex carbohydrates and now rely more on protein, high-fiber foods and wheat. I have had insulin resistance for about five years, beginning after the birth of my daughter.
My doctor prescribed metformin 500 mg once daily, vitamin B12 1,000 mcg daily, folic acid 400 mcg daily and one spoonful of cod-liver oil. I started one month ago. How long will it take before I see results?
Quick Answer
There is no guaranteed one- or three-month deadline for “reversing” insulin resistance. Metformin begins affecting glucose production soon after treatment starts, but meaningful progress is usually judged from symptoms, weight, glucose readings and laboratory results over several months. HbA1c is commonly reassessed after about three months because it reflects the preceding two to three months. Do not eliminate all complex carbohydrates: wheat, legumes and other whole grains are themselves complex carbohydrates. The correct diet, testing schedule and need for metformin depend on whether you have prediabetes, type 2 diabetes, polycystic ovary syndrome, previous gestational diabetes or another diagnosis.
Answer by Dr. Albana Greca, MD, MMedSc
Hello Mary,
Before predicting results, clarify the diagnosis and which measurable outcome treatment should improve.
Insulin resistance means muscle, liver and fat cells respond poorly to insulin. The pancreas may compensate by producing more, and some people later develop prediabetes or type 2 diabetes.
No single routine test perfectly measures insulin resistance. Doctors consider fasting glucose, HbA1c, waist, lipids, fatty liver, polycystic ovary syndrome and pregnancy history. See what insulin resistance means.
Metformin reduces liver glucose production and modestly improves insulin sensitivity. Readings may change within days, but response is assessed over time.
Not feeling different after one month does not mean failure. Insulin resistance may cause no symptoms, so energy is not a reliable test. See metformin for insulin resistance.
Metformin treats type 2 diabetes and is also used in selected people with prediabetes or polycystic ovary syndrome.
For prevention, metformin is considered mainly in higher-risk adults, including some younger adults with substantial obesity, higher glucose or HbA1c, and women with previous gestational diabetes. Lifestyle was more effective overall in the Diabetes Prevention Program.
Because this began after pregnancy, ask whether you had gestational diabetes, polycystic ovary syndrome or abnormal postpartum glucose.
Wheat is a carbohydrate, and whole wheat is a complex carbohydrate. Legumes, oats, brown rice and other whole grains are also complex carbohydrate foods. The goal is usually to improve carbohydrate quality and portion size—not remove the entire group.
A balanced plate can include vegetables, high-fiber carbohydrate, protein and healthier fat. Very high protein may be unsuitable with kidney disease. See carbohydrates and diabetes.
Avoid extreme dieting: A “strict” plan that cannot be maintained is unlikely to produce lasting benefit. Choose a sustainable eating pattern that supplies adequate fiber, protein, vitamins and minerals.
Activity improves insulin sensitivity even without major weight loss. Aerobic and resistance exercise help, but running twice daily is unnecessary.
With overweight, losing about 5%–7% can reduce diabetes risk. At a healthy weight, maintenance and fitness may be better goals. See insulin resistance treatment.
Monthly insulin-related testing is usually unnecessary. HbA1c is often checked after about three months, while fasting glucose may be checked sooner.
Ask for the actual baseline and follow-up numbers:
Fasting insulin or HOMA-IR may be used in some settings, but results are not standardized enough to serve as a universal monthly target.
These supplements do not reverse insulin resistance. B12 may be prescribed for deficiency or because long-term metformin can lower it; one month usually does not cause deficiency.
Folic acid dosing depends on pregnancy plans. Cod-liver oil contains vitamins A and D, and excess vitamin A can be harmful, especially in pregnancy. Confirm each dose with your doctor.
Take metformin with food as prescribed. Early effects may include nausea, diarrhea, gas and discomfort. Kidney function must be checked.
Contact a clinician promptly for persistent vomiting or diarrhea, inability to drink, severe weakness, rapid breathing, unusual sleepiness, dehydration, or symptoms of very high or low glucose. Do not stop or increase metformin independently.
Instead of expecting reversal on a fixed date, agree on measurable glucose, activity, diet and weight goals. Review treatment after about three months.
Insulin sensitivity can improve, but permanent reversal is not guaranteed. Long-term habits and follow-up remain important.
This educational answer does not replace individualized diagnosis, pregnancy advice, nutrition planning or medication monitoring.
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