Vitamin D is an essential nutrient, responsible for helping maintain stable phosphate and calcium levels, while supporting strong bones and muscles.
Constipation problems from taking excessive doses of vitamin D are unlikely, though too much vitamin D could potentially cause other issues like stomach pain and nausea.
Exploring the Link: Vitamin D and Constipation

Deficiency
Deprivation of vitamin D is common among those suffering from intestinal motility disorders, and may contribute to their symptoms, according to a 2013 study published in Alimentary Pharmacology and Therapeutics. This deficiency stems from an absence of enzymes in liver and kidney that convert sun-exposed skin or food into its biologically active form – either due to being sun damaged, food consumption or liver/kidney dysfunction.
People unable to obtain enough vitamin D through diet or sunlight often turn to supplements as a means to increase their levels. Unfortunately, taking too much vitamin D may result in serious health complications including constipation.
Excess vitamin D causes calcium build-up in the body which causes bloating, constipation, stomach pain, diarrhea as well as hypercalcemia; an indication of kidney or heart conditions.
Irritable Bowel Syndrome (IBS) is a complex disorder with symptoms including abdominal pain, bloating, difficult or unusual bowel movements and feelings of incomplete emptying of the bowels. Seek advice from healthcare professionals in order to alleviate its symptoms and find effective solutions for managing it.
Excess
Vitamin D in large doses can cause constipation due to hypercalcemia. When this condition exists, excess vitamin D supplements cause calcium levels to build up in your blood, leading to digestive symptoms like stomach ache, nausea and vomiting as well as bloating; untreated it could result in bone pain or kidney stones.
Maintaining a diet rich in vitamin D should not result in constipation; however, if you experience symptoms of constipation it’s wise to contact your physician who may prescribe stool softeners or other treatments to ease this discomfort.
Care/of’s Easy Digestion Sunny D3 supplement offers plenty of vitamin D while still supporting digestion – click here for more info about this reputable product! Remember also that correlation does not equal causation: any links between vitamin D and constipation could be the result of other factors rather than directly caused by vitamin D itself;
Combination
Vitamin D can have detrimental effects on your gastrointestinal health if taken in excess, resulting in constipation. Although your body produces vitamin D naturally and some food sources contain it as well, for optimal results it’s best to get it through diet or fortified supplements instead of overdoing it through pills.
If your dosage of calcium supplement is too high, it could lead to hypercalcemia – an excess of calcium in the blood resulting in symptoms like constipation, stomach pain, weakness and nausea.
Some people take vitamin D supplements in combination with iron, zinc, calcium, and probiotic supplements in an attempt to relieve constipation. But always consult your physician first about any new bowel habits; they will help find an ideal balance for you and may suggest alternative supplements that suit you better; plus they can determine if your constipation stems from vitamin D deficiency or something else altogether.

Causes
Normal digestion involves food passing from the small intestine into the large intestine (colon), where nutrients are absorbed from partially digested waste products and converted to solid stool that you push out of your body. Constipation occurs when this waste remains too long in your colon, becoming hard and dry and forcing you to have to urinate regularly to expel it.
Vitamin D can be found in various food and drink items, such as salmon, orange juice, fortified dairy products and mushrooms. Supplements come in the form of capsules, softgels or gummies; however excessive consumption may lead to hypercalcemia with symptoms including constipation.
Constipation can be caused by any number of medical conditions, from liver disease and intestinal obstruction to digestive conditions like inflammation bowel disease, rheumatoid arthritis, Crohn’s disease or celiac disease. Certain antibiotics and antacids may also contribute to constipation.
Can Vitamin D Cause Constipation?
There is disagreement among sources regarding the potential relationship between vitamin D and constipation. Some sources suggest that vitamin D deficiency may contribute to digestive troubles, including constipation. A study of 86 patients with chronic constipation found that vitamin D deficiency was one of the primary factors behind their digestive issues.
The World Journal of Gastroenterology has proposed that links between vitamin D and chronic constipation could be due to increased inflammation and a weakened immune response associated with vitamin D deficiency.
Conversely, other sources argue against a direct causal relationship between vitamin D and constipation. Although some studies have found correlations between lower levels of vitamin D and the presence of digestive problems, it is important to note that correlation does not imply causation.
It is noteworthy that constipation can stem from various causes, extending beyond dietary choices and supplement consumption. Certain vitamins and minerals, like magnesium and vitamin C, have the potential to trigger loose stools or diarrhea, whereas calcium and iron might induce constipation. Moreover, imbalances in micronutrients such as elevated levels of calcium or zinc can also contribute to constipation.
In general, there is some evidence indicating that a lack of vitamin D could play a role in digestive problems like constipation. However, it’s still not entirely conclusive whether vitamin D directly causes constipation. If you’re currently experiencing constipation, it’s crucial to seek advice from your healthcare provider to eliminate any underlying concerns and determine the most suitable treatment plan.
How Much Vitamin D Is Too Much and Can Cause Constipation
Excessive intake of vitamin D can potentially lead to constipation, among other digestive problems. When you consume toxic levels of vitamin D, it may cause constipation and other gastrointestinal issues. However, it is important to note that vitamin D itself has not been shown to directly cause constipation.
The connection between vitamin D and constipation is largely a myth, and no research has demonstrated a direct, causal relationship between the two.
It is worth mentioning that constipation can have various causes, and other vitamins and minerals can also contribute to gastrointestinal issues. For example, excess intake of calcium and iron can lead to constipation, while deficiencies in magnesium and vitamin C can cause loose stools or diarrhea.
Additionally, imbalances in other micronutrients, such as elevated calcium or zinc levels, can also result in constipation.
To determine the appropriate amount of vitamin D intake, it is recommended to follow the guidelines provided by the National Institutes of Health’s Office of Dietary Supplements. The maximum daily amount of vitamin D3 that people should consume is as follows:
– 1,000 to 1,500 IU for infants
– 2,500 IU for children 1 to 3 years
– 3,000 IU for children 4 to 8 years
– 4,000 IU for children 9 years and older, adults, and pregnant and lactating teens and women.
If you are experiencing constipation or have concerns about your vitamin D intake, it is always best to consult with your healthcare provider. They can help rule out any underlying issues and provide personalized guidance on supplementation and diet.

What Are Other Possible Side Effects of Vitamin D Toxicity
Excessive vitamin D intake causes toxicity, leading to side effects. Side effects result from elevated blood calcium (hypercalcemia). Possible side effects:
- Digestive issues: Stomach pain, constipation, diarrhea.
- Loss of appetite: Decreased appetite.
- Nausea and vomiting.
- Weakness and fatigue: Muscle weakness.
- Dehydration.
- Increased thirst (polydipsia).
- Frequent urination (polyuria).
- Confusion, cognitive changes: Lethargy.
- Kidney problems: May increase kidney disease risk.
Vitamin D toxicity is rare, mostly from excessive supplements, not diet or sun. If you suspect toxicity or experience symptoms, consult a healthcare provider.