Which Foods Make People Who Use Metformin Get Diarrhea?

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Metformin can cause side effects if it accumulates in the body without proper hydration. To prevent vomiting or diarrhea, individuals should replenish with extra fluids. Avoid foods that may worsen symptoms, such as fried or greasy foods, dairy, caffeine, and alcohol, as well as fruits or vegetables that cause gas. High-sugar foods, particularly those high in fiber or sugar alcohols, can exacerbate diarrhea in individuals taking metformin.

The BRAT diet, which includes bananas, rice, apples, tea, and toast, can decrease strain on the gastrointestinal tract. The diarrhea caused by metformin may be partly due to an osmotic effect, as it causes a higher amount of bile acids and glucose in the intestines. Simple and refined carbohydrates like white bread, pasta, white rice, muffins, and sweetened beverages can cause rapid spikes in blood sugar.

7 foods to avoid while taking metformin include sugary drinks and treats, high-sugar fruits, processed and packaged foods, and high-fat foods. Avoid white bread, white rice, white pasta, candy, soda, desserts, and snacks like chips or crackers. Metformin-induced diarrhea developing in individuals starting the medication has been attributed to changes in the gut microbiome and increased intestinal glucose.

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📹 What To Avoid When Taking Metformin | Drug Interactions | Pharmacology

What To Avoid When Taking Metformin | Drug Interactions | Pharmacology Metformin is a medication used to reduce or lower …


What food cannot be taken with metformin?

7 foods to avoid with metforminSimple/refined carbs. High sugar foods. High sodium foods. Saturated fats. Alcohol. Excessive fiber. Processed foods.

Metformin lowers blood sugar levels in people with diabetes, improving their overall health outcomes.

Some foods, like those high in sugar, sodium, and saturated fat, counteract metformin, making it harder for the drug to keep blood sugar low.

If you have GI side effects from taking metformin, you can take it with meals or ask your provider for advice on adjusting your dose or formulation.

What should I eat for breakfast while on metformin?
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What should I eat for breakfast while on metformin?

Foods to Consider While Taking Metformin. In addition to taking metformin, some foods can help support blood glucose control.

Complex carbohydrates : Unrefined grains such as brown rice, whole grain oats, whole-grain bread, and quinoa contain fiber. Fiber slows the rate at which your body converts carbs into glucose, leading to more stable blood glucose levels. It also helps promote healthy insulin and glucose levels, supports gut health, and may help with weight loss.;

Healthy fats : A low-fat diet is important, and the type of fat also matters. Fish, nuts, avocado, and olive oil all contain unsaturated fats, which help fight inflammation and protect heart health.;

Fiber : Most Americans don’t get enough fiber. This nutrient supports a healthy digestive tract, good blood sugar levels, and weight loss. Aim for 25-30 grams per day from whole grains, fruits, and vegetables. You can also try a fiber supplement if you struggle to eat enough fiber, but check with your medical provider. Don’t take fiber supplements at the same time as metformin, since they may change the way your body absorbs the drug.;

What should a diabetic eat first thing in the morning?
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What should a diabetic eat first thing in the morning?

There are many options to consider when choosing the best breakfast foods for type 2 diabetes. Opting for nutrient-dense, whole foods that provide a steady release of energy and support optimal blood sugar management is key.

Good breakfast options include whole grain cereals, Greek yogurt with berries, eggs, avocado, and low sugar smoothies.

A person can also talk with a doctor or registered dietitian for personalized dietary advice.

What happens if you eat carbs on metformin?
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What happens if you eat carbs on metformin?

Some simple and refined carbohydrates. Metformin helps limit blood glucose levels. Simple and refined carbs boost those blood sugar levels, which can increase weight gain and cause metformin not to work as well as it should. Foods like white bread, white pasta, and most chips, crackers, and cookies have little fiber and lots of sugar.

Look at labels, and steer clear of candy, soda, and super-sugary desserts as much as possible. Eating foods that raise your blood sugar won’t stop metformin from working, but it will make it more challenging for it to do its job, so these are some foods to avoid while taking metformin.

Eat saturated fats in moderation. While metformin is a diabetes drug, it’s also used off-label to treat obesity. Saturated fats can increase inflammation and make it harder to lose weight. So even as metformin works to help you lose weight, saturated fats can counter that effort and make it tougher for it to perform optimally.

What does metformin poop look like?
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What does metformin poop look like?

If you take an oral tablet form of metformin, you may sometimes notice something in your stool (poop) that looks like the tablet. This is normal and should not cause concern.

Do not chew, cut, or crush extended-release metformin tablets, they should be swallowed whole.

Metformin can cause ovulation (release of an egg from your ovary) if you have not gone through menopause, even if you do not have regular periods. This can increase your chance of getting pregnant.

Can I eat eggs with metformin?

Metformin, a medication for Type 2 diabetes, is effective in improving blood sugar levels and increasing insulin sensitivity. However, its effectiveness can be significantly influenced by dietary choices. Metformin is primarily used to manage Type 2 diabetes by reducing liver glucose production and enhancing insulin sensitivity. It is also used in conditions like PCOS and gestational diabetes, demonstrating its versatility in managing insulin-related disorders. Dietary choices significantly impact metformin’s efficacy, with foods high in simple carbohydrates, sugars, sodium, and saturated fats potentially undermining its benefits. Alcohol consumption is cautioned as it is metabolized in the liver, potentially leading to decreased drug effectiveness and increased risk of lactic acidosis. Complex carbohydrates, lean proteins, and healthy fats can augment metformin’s blood sugar-lowering effects. High-fiber intake should be balanced to avoid affecting metformin’s absorption and overall blood glucose management. Physicians should consider the extended-release formulation for patients experiencing gastrointestinal side effects, and regular monitoring of vitamin B12 levels is recommended for long-term metformin therapy patients. The interaction between metformin and ginseng may require closer blood sugar monitoring due to potential effects on blood glucose levels.

How do I stop diarrhea from metformin?

The most common metformin side effect is diarrhea. You may be able to prevent or manage this side effect by taking it with a meal, switching to an ER formulation, or working with your healthcare provider to slowly adjust your dose.

Can I eat bananas while taking metformin?
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Can I eat bananas while taking metformin?

Takeaway. A person with diabetes should include a variety of fresh, whole foods in their diet, such as nutrient-dense fruits and vegetables. Bananas are a safe and nutritious fruit for people with diabetes to eat in moderation as part of a balanced, individualized eating plan.

A person with diabetes needs to consider the contents of each meal carefully. For the most part, eating bananas in moderation is safe for people with diabetes.

Bananas grow on plants that can have 50–150 bananas in each bunch. Stores sell smaller bunches and individual bananas in varying sizes, from small to extra large.

Depending on the size of the fruit, bananas can contain 19–35 grams (g) of carbohydrates per serving, which can be an important consideration for individuals with diabetes.

Can you drink milk with metformin?
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Can you drink milk with metformin?

Red meat and dairy products—like milk, cheese, and butter—are popular sources of saturated fats. These aren’t foods to avoid while taking metformin altogether but focus on lean proteins—like turkey, fish, and tofu to increase metformin’s efficacy.

Avoid trans fat. Trans fat can happen naturally in some foods and be added to others. It raises cholesterol, causes inflammation, and increases the risk of heart disease. Baked goods and fast and fried foods can all contain trans fat, making these foods to avoid while taking metformin. So be on the lookout for it by checking nutritional labels when buying groceries or eating out.

Limit sodium. Those with obesity also often have high blood pressure or heart problems. Excessive amounts of salt may increase the risk of those other conditions and lead to more life-threatening issues. The FDA recommends consuming less than 2, 300 mg of sodium per day—that’s about one teaspoon of table salt—and most Americans consume about one and a half times that.

How long do metformin poops last?
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How long do metformin poops last?

Most diarrhea that is caused by metformin will only be a short-term side effect.

In some cases, but far less often, metformin can be a cause of chronic diarrhea long after the body has adjusted to the medication.

Chronic diarrhea is more than just a few days, but lasts several weeks at a time. In studies done on metformin causing chronic diarrhea, it typically resolved as soon as metformin was discontinued.

How Long Does Diarrhea from Metformin Last?. The typical side effect of diarrhea that is caused by metformin does not last long-term.

It typically resolves within a few days or few weeks once the body adjusts to the medication.

What is the best diet while taking metformin?
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What is the best diet while taking metformin?

Veggies, lean proteins, and whole grains can help keep your blood sugar steady with metformin. If you eat something you shouldn’t, drinking water or going for a walk can help to bring your blood sugar back down.


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Which Foods Make People Who Use Metformin Get Diarrhea?
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Elle Pierson

Hi, I’m Elle Pierson, RN, MBA—a passionate Healthcare Consultant dedicated to empowering individuals and organizations to achieve better health outcomes. As a TEDx Speaker, Author, and Mentor, I bring my expertise in medicine and healthcare management to help others navigate complex systems with confidence. My mission is to inspire change and create meaningful solutions in the world of healthcare. Thank you for joining me on this journey!

Education: Bachelor of Science in Nursing (BSN) and Executive MBA from Texas Woman’s University.
Email: [email protected]

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11 comments

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  • As a physician of 40 plus years, I recommend 500mg BID starting with 500mg in the AM. It is a must to have the patient take 1000mcg B12 with 400mcg of folic acid every day. In the long term, with out the cyanocobalamin (B12) they will have serious problems later. The folic acid carries the B12 into the system to be used. Just a FYI.

  • Thank you Diana. I’ve been taking 1000mg of metformin twice daily for 20 yrs.. My primary physician never once has brought up the B-12 recommendation. I took it upon myself to research it. I take Nature’s Bounty B-12 always placing it under my tongue for a minute before swallowing. This is a USP tested product which is what I always look for in supplements. I’ve just found your site and have subscribed.

  • Diana Was searching today on YouTube about the side effects of taking metformin and came across your website. My Dr. Started me taking metformin 500 mg one tablet bid for a week and the switch it to 2 tablets bid, I didn’t notice the onset of symptoms until I started the new regimen. I thought it was because I was taking amoxicillin with the metformin because I had a root canal done and I thought it was causing me to have diarrhea but boy was I wrong I have to say thank you for breaking this down for me you just took the guessing out for me 👍

  • I tried starting it a week ago…got exactly what you listed at the beginning ..total Gastro issues, terrible, diarrhea in the middle of the night…I stopped taking it . I started a LOW CARB DIET 10 days ago ..losing weight so far. They gave me 500 twice a day, I cannot tolerate it. I am Pre-diabetes officially so I am going to try with diet alone right now.

  • Voice of diabetes!!! Can you do a article on byetta,tradjenta,glipizide,metformin,levemir,novolog and how taking all those medications help with diabetes for type 2 and what are the pros and cons of taking them ? I see many other articles on topics of medicine and doctors and online and pharmacy only give so much info I’d like to know more about it and is there any new information you can provide for type 2 diabetes.

  • I was told I was a Diabetic on a walk in I did. I couldn’t believe what I heard cause I was told my lab work was good most of my life.. So I did what I was told by the Dr. Still I couldn’t believe so this what I did I took the b12 metformin and BGR and that come up good all the time and also stop sugar goodie till next update appointment and told I was doing a lot better and schedule another update.. And after that visit I stop taking only the b12 metformin and started up the goodies.. My BGR that come up good all the time.. On the next update appt I was told I was doing better and keep up with b12 metformin.. Been almost 3 years and till this day I never told the Dr I stop taking the b12 metformin.

  • I am Type 2 diabetic for the last 15 yrs.I am taking medicines Torglip50/500&GlygometGP1 twice daily and my HBA1C is 6.0.Both these medicines contains 500mg Metformin each and I am consuming these medicines for the last 6 months.That is 2000mg Metformin is consumed daily.Now I am having excess flatulence which make my life miserable.Also stomach issues .Is these problems are because of Metformin dosage?

  • I have been taking metformin for 0ver 30 years, 2x1000mgs daily. I am breaking them and taking them 4 times daily, No negative effects except over the last year or so I have been constipated. After years of not having that side effect is it likely that metformin in now the cause? Any suggestion on maybe taking it differently? Is it likely to be the cause of my constipation? I have had all kinds of test over the years and never saw any negative side effect from metformin. Also, this does not definitively mean anything, but I will be 79 in a week, which is 5 years older than the next oldest person in my immediate family has lived to be. Perhaps metformin can also increase life expectancy? Thanks……

  • I have a question my husband takes 1000 and he’s A1C whent from 7 to 6 and he’s blood sugar numbers are good it has being only two months and the doctor gave him another pill why if the nutrition told him he’s doing good and to eat more so he wouldn’t loose to much weight so he’s not taking more than 1000 she said she will him in more weeks more why ?

  • hello 🙂 thanks for your great article, i have insulin resistant and started taking metformin in december i started with 500ml a day and worked my way up ..i am now at 2000ml a day,i didn’t have any extreme Gastrointestinal complaints but i have a lot of flatulence is this normal ? and will this go away? and I have to say that I haven’t lost weight ? ..are there certain things to be aware of when it comes to the diet while taking metformin?

  • I’m currently taking metformin at glib ride and lisinopril together I have been on and off this stuff for too many years account I really think I’m in trouble with this new clinic I’m going to with these doctors either some scary times take this pill come see this other doctor come back in 4 weeks to a month repeat I’ve gone from 5:12 to 3:20 with no help from the drugs I actually stopped going to the doctor for 2 years I don’t know why I started up going again I think it was just severe pain all the time headaches wearing some bad times

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