Can Diarrhea Result From Taking A B Complex Vitamin?

Vitamin B supplements, such as vitamin C, zinc, and fish oil, can cause diarrhea. Excessive intake of B vitamins can lead to nausea, vomiting, diarrhea, flushing, numbness, and tingling, as well as nerve or liver damage. It is crucial to follow the instructions when taking vitamin B supplements to avoid adverse effects such as diarrhea, rashes, and headaches. Constipation, diarrhea, or upset stomach may also occur, but these effects are usually temporary and may disappear as the body adjusts to the medication.

Vitamin B3 can cause diarrhea and increased bleeding in doses of 500 mg per day, while doses higher than 3,000 mg can cause vomiting and liver damage. Diarrhea can occur from the combination of high doses of multiple B vitamins. Functional Medicine Labs are exploring potential causes of diarrhea, and other side effects of B-Complex with B-12 include constipation, a change in stool color to green, diarrhea, and belly pain.

Side effects of Vitamin B Complex include vomiting and nausea, skin conditions like flushing or lesions, high blood sugar levels, nerve damage, and hair loss. In general, symptoms of vitamin toxicity include nausea, gastrointestinal problems like constipation and diarrhea, hair loss, rashes, and nerve damage.

How do I know if I’m taking too much vitamin B complex?

High doses of supplemental B3 (niacin) may lead to vomiting, high blood sugar levels, skin flushing, and even liver damage.

Additionally, high doses of B6 can cause nerve damage, light sensitivity, and painful skin lesions.

Another side effect of B-complex supplements is that they can turn your urine bright yellow. Although discolored urine can be shocking, it’s not dangerous — it’s simply your body getting rid of excess vitamins that it can’t use.

If you need to take a B-complex supplement, always choose reputable brands that volunteer to have their products independently tested by organizations like the US Pharmacopeia (USP).

Although taking a vitamin B complex as directed is likely safe, consuming high doses of B3 or B6 can lead to serious side effects.

What are the side effects of long term use of vitamin B complex?

High doses of supplemental B3 (niacin) may lead to vomiting, high blood sugar levels, skin flushing, and even liver damage.

Additionally, high doses of B6 can cause nerve damage, light sensitivity, and painful skin lesions.

Another side effect of B-complex supplements is that they can turn your urine bright yellow. Although discolored urine can be shocking, it’s not dangerous — it’s simply your body getting rid of excess vitamins that it can’t use.

If you need to take a B-complex supplement, always choose reputable brands that volunteer to have their products independently tested by organizations like the US Pharmacopeia (USP).

Although taking a vitamin B complex as directed is likely safe, consuming high doses of B3 or B6 can lead to serious side effects.

What happens when you start taking vitamin B complex?

B vitamins play a vital role in maintaining good health and well-being. As the building blocks of a healthy body, B vitamins have a direct impact on your energy levels, brain function, and cell metabolism.

Vitamin B complex may help prevent infections and help support or promote:

• Cell health
• growth of red blood cells
• energy levels
• eyesight
• brain function
• digestion
• appetite
• proper nerve function
• hormones and cholesterol production
• cardiovascular health
• muscle tone

B vitamins are especially important for those who are pregnant or breastfeeding. These vitamins aid in fetal brain development, and they reduce the risk of birth defects.

For people who are expecting, B vitamins may help manage energy levels, ease nausea, and lower the risk of developing preeclampsia.

Can vitamin B complex cause diarrhea?

Constipation, diarrhea, or upset stomach may occur. These effects are usually temporary and may disappear as your body adjusts to this medication. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

If your doctor has prescribed this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching /swelling (especially of the face/ tongue /throat), severe dizziness, trouble breathing.

Is it normal to get diarrhea after taking vitamins?

Nowadays, everything from bottled water to orange juice seems to have souped-up levels of vitamins and minerals in it. That may sound like a way to help cover your nutritional bases, especially if your diet is less than stellar. But routinely getting an overload of vitamins and minerals can hurt you.

Too much vitamin C or zinc could cause nausea, diarrhea, and stomach cramps. Too much selenium could lead to hair loss, gastrointestinal upset, fatigue, and mild nerve damage.

While most people aren’t getting megadoses, if you eat a fortified cereal at breakfast, grab an energy bar between meals, have enriched pasta for dinner, and take a daily supplement, you could easily be over the recommended daily intake of a host of nutrients.

Here’s what you need to know to avoid overdoing it.

Should you take a break from vitamin B complex?

Vitamin B complex appears to be safe for most people to take every day as the body does not store any excess. These vitamins are eliminated in the urine. When taking vitamin B supplements, however, it is essential to follow the instructions. Taking too much of some B vitamins may have adverse effects, like diarrhea, rashes, and headaches.

B vitamins are essential for the proper working of the nervous system, cardiovascular system, and many other functions. There are several B vitamins, collectively available in supplement form as vitamin B complex.

People who may need B vitamin supplements include older adults, people who are pregnant, and those who follow a strict plant-based diet. A doctor can advise on whether you need vitamin B complex or a specific B vitamin.

What to avoid when taking vitamin B complex?

Some products that may interact with this drug are: altretamine, cisplatin, certain antibiotics (such as chloramphenicol), certain anti- seizure drugs (such as phenytoin), levodopa, other vitamin/nutritional supplements.

This product may interfere with certain lab tests (such as urobilinogen, intrinsic factor antibodies ), possibly causing false test results. Make sure lab personnel and all your doctors know you use this product.

Does VITAMIN B Complex Capsule interact with other drugs you are taking?

Why am I pooping out my vitamins?

Summary. There are many reasons why a pill or capsule may appear undigested. It could be that the capsule has not broken down fully, though the active drug may have been absorbed. Or, you may have diarrhea or another disorder that causes a drug to pass through the intestines too quickly. Or, you could simply be taking the drug incorrectly.

Whatever the cause, let your healthcare provider know if you find undigested medications in your stool. It may not be a serious concern but will likely be something your healthcare provider will want to check out.

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

Is it normal to poop more when taking vitamins?

Some vitamins and minerals can cause loose stools or diarrhea, including magnesium and vitamin C. Other supplements, such as calcium and iron, can cause constipation.

People should speak with a doctor before starting or stopping a vitamin or mineral supplement.

Is it safe to take AB complex vitamin daily?

It’s probably not necessary to take B complex every day if you eat a healthy diet and have no medical conditions that make it difficult to absorb the vitamins from your food. That said, unless your doctor says otherwise, there is usually no harm in taking a daily supplement.

What should you avoid when taking vitamin B complex?

If you are taking vitamin B12, there are some drugs to avoid, or you may have to change the dosage times, because they might stop your body from absorbing the vitamin. This includes colchicine (for gout), proton pump inhibitors (to lower stomach acid production), aminosalicylic acid (for digestive issues), and even vitamin C tablets.

Is it better to take AB complex or a multivitamin?

Most multivitamin-mineral products contain the B-complex along with the rest of the essential vitamins and minerals. Since they are more complete than B-complex vitamins alone, multiple vitamin-mineral supplements are recommended to improve overall micronutrient intake and prevent deficiencies.

Our proprietary “Star-Rating” system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.