Tag: Vitamin intolerance

While many people take multivitamins to boost their health, some experience unpleasant side effects like stomach pain. A significant number of multivitamin users, for instance, report nausea or other gastrointestinal symptoms shortly after consumption. So, is it normal for your stomach to hurt after taking a multivitamin? The short answer is yes, but it often indicates a simple-to-fix issue with how or what you're taking.

According to one systematic review, instances of vitamin hypersensitivity are potentially underestimated and poorly recognized. This raises a critical question for many supplement users: can you have an intolerance to vitamins, or are other factors at play when your body reacts poorly to them?

According to a study published in the journal *Nutrients*, some individuals may experience mild gastrointestinal upset after taking vitamin B supplements, a side effect often linked to high dosages or taking them on an empty stomach. This discomfort often leads to the question, "Is vitamin B hard on your stomach?".

According to a 2017 study, some users experience temporary gastrointestinal symptoms, such as nausea, when starting multivitamins. It is a common concern that leads many to ask: **Can vitamins make you feel worse before better?** The answer is that while it is not the norm, several factors can cause this initial, temporary discomfort as your body adjusts to the new nutritional intake.

According to a 2019 study, up to 65% of Americans take multivitamins, yet many experience adverse symptoms, leaving them to wonder, "Why is my body rejecting vitamins?". The answer often lies in an underlying digestive issue, improper dosage, or the form of the supplement itself, rather than a true "rejection."

While severe anaphylactic reactions to vitamin supplements are rare, most allergic responses can happen within an hour of taking a vitamin, while others may be delayed by hours, days, or even weeks. The answer to **how long does it take to have an allergic reaction to a vitamin?** depends heavily on the type of reaction and the specific substance triggering the immune response.