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Can I manage my blood sugar with diet at 77?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am a 77-year-old female. During a blood test recently, I noticed that the fasting blood sugar is 152, and the post-prandial blood sugar is 171 mg/dL.

One month before, during a general health check-up, I noticed fasting blood sugar 142 mg/dL, and HbA1c was 7.7 percent, estimated average was 174.3 mg/dL.

The results from the kidney function test and the liver function test are all within normal range. There are no specific health issues as of now, and I am taking no medication.

  1. What medicine should I start taking for my blood sugar?

  2. Can I manage it through my diet?

Please help.

Thank you.

Hello,

Welcome to icliniq.com.

I have read your query and can understand your concern.

Based on the available reports, the diagnostic criteria for diabetes mellitus (a chronic metabolic disorder characterized by high blood sugar (hyperglycemia) due to insufficient insulin production or ineffective insulin use)are fulfilled. It is reassuring that kidney and liver function tests are within normal limits and that you have no current symptoms or other medical conditions.

For a healthy older adult, a reasonable HbA1c goal is around seven to 7.5 percent. With an HbA1c (glycated hemoglobin) of 7.7 percent, lifestyle measures alone are unlikely to achieve adequate control, as insulin secretion declines with age. Early pharmacologic therapy is therefore advisable to prevent progression and long-term organ damage.

I would recommend initiating Metformin 500 mg once daily with the main evening meal. If well tolerated, this may be increased to twice daily. Mild gastrointestinal side effects may occur initially; if troublesome, an extended-release formulation can be considered. Renal function should be monitored periodically.

Along with medication, dietary modification is essential. Avoid added sugars and refined carbohydrates, and ensure adequate protein intake. Fruits should be limited to one small portion daily. Regular physical activity, such as 20 to 30 minutes of walking most days of the week, should be encouraged, adjusted to your comfort and safety.

I suggest repeating fasting and post-meal glucose after about three to four weeks to assess response, and HbA1c (glycated hemoglobin) after three months. You may follow up after 10 days as needed.

I hope this answers your query.

Please let me know if I can assist you further.

Thank you.

Patient's Query

Hello doctor,

Thank you very much for your response.

I had some doubts:

  1. Used to take plantain boiled once or twice a week. Is this okay?

  2. Also, what are the foods to be avoided? I do not take white sugar and do not take sweet items.

  3. How many rice items can I take? Mostly, the evening meal is millet.

  4. Can I take a vitamin D supplement when I take Metformin?

  5. How much IU per day of vitamin D should I take?

  6. I heard that those who start taking Metformin lifelong should continue taking it; is that true?

  7. Are there any side effects?

  8. I am alone at home during the day. Is there any risk of sugar levels coming down due to this medicine?

Kindly assist.

Thank you.

Hello,

Welcome back to icliniq.com.

I have read your query and can understand your concern.

Boiled plantain can be taken occasionally, but in small portions (about half of a medium banana at a time) and not daily, as it is high in carbohydrates and can raise blood sugar. Since you already avoid white sugar and sweets, that is good. For rice, try to limit to about half a cup cooked per meal. If possible, prefer parboiled or brown rice and always combine with vegetables. Millets in the evening are fine, again with portion control.

Foods to keep minimal include sweets, bakery items, fruit juices, soft drinks, maida products, and large portions of rice or potatoes. Emphasize vegetables, dals, curd or paneer, eggs, or other protein sources. One small fruit per day is acceptable.

You may safely take vitamin D along with Metformin; there is no interaction. As your vitamin D is low, you can take vitamin D3 (Calciferol) 60,000 IU (international units) once weekly for six to eight weeks, then once monthly as maintenance. Levels can be rechecked after about three months.

Regarding Metformin, many patients do take it long term, but it is not automatically lifelong. This depends on how your sugars respond over time. Some people can later reduce the dose if control is good. Mild stomach upset or loose stools can occur initially and usually settle. Serious side effects are uncommon when kidney function is normal.

Metformin by itself does not usually cause low sugar levels, so there is no special risk even if you are alone during the day. Just avoid skipping meals and try to eat at regular times.

I hope I have answered all of your queries.

Revert in case you have any doubts.

Thank you.

Medically reviewed byiCliniq medical review team

Published At April 9, 2026
Reviewed AtApril 10, 2026

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