Multivitamins are generally consumed to supplement deficiencies of essential vitamins in the human body. But consuming too many at once, and that too daily, could be exposing you to side effects instead. An excess amount of multiple vitamins can turn into serious side effects, nutrient imbalances, and even toxicity. Most people are on multiple vitamins, as supplements have become popular, and their ability to boost immunity, energy, and general wellness, and address nutritional gaps is what has led to their overuse.

Supplements such as multivitamins need to be consumed with caution, as their hidden side effects may turn serious without realising it. According to the National Institute of Health (Office of Dietary Supplements), most standard multivitamins are safe when their dosage is controlled. But health risks increase when supplements containing highly concentrated nutrients are taken in conjunction with each other.

Do Healthy Adults Actually Need Daily Multivitamins?

No, as most nutrients are best obtained by consuming the food sources that are at risk from them. But due to environmental challenges such as climate change, the nutritional quality of normal fruits and vegetables has decreased. This has made consuming supplements such as multivitamins common.

There are certain individuals who need supplementation as their bodies medically need the extra dose. These groups are:

  • Pregnant women need the extra nutrients in controlled doses.
  • Older adults, as their internal systems are unable to absorb nutrients from consumed food.
  • Vegans and vegetarians, as their limited nutritional intake makes them vulnerable to developing deficiencies.
  • People with deficiencies need to take a multivitamin as prescribed by their doctor.

Hidden Side-Effects Of Taking Multivitamins Every Day

The National Institute of Health (Office of Dietary Supplements) pinpoints that fat-soluble vitamins such as A, D, E, and K need to be consumed carefully, as they can turn toxic if their balance is not maintained. Multivitamins also tend to interact with medications such as blood thinners and prescription drugs, so consulting a doctor is vital before starting a multivitamin. If you consume too many multivitamins at once, then you need to be aware of the multiple side effects that they can trigger.

Digestive Discomfort

Research published in the International Journal of Scientific Research and Engineering Development suggests that taking too many vitamins at once can cause these digestive issues:

  • Nausea
  • Stomach upset
  • Constipation
  • Diarrhea

Note: If you notice any of these side effects after consuming a multivitamin, then immediately consult a doctor. If the toxicity of multivitamins progresses, then it can turn into serious organ damage.

Vitamin Toxicity

The health risks associated with excessive intake of vitamin A can be neurological, liver toxicity, bone loss, high fracture risk, and birth defects during pregnancy. The body requires a balance, and when it tips into either too much or too little scale, then side effects are imminent. Another vitamin that is essential for the body and most frequently supplemented is vitamin D. However, a high dose of it can turn into hypervitaminosis D when the level of it increases too much.

Mineral Overload

Research published in the Ageing Research Review pinpoints that a mineral load can inflict damage on your internal organs if you consume too many vitamins at once. Be it too much iron, zinc, or selenium, the problem with multi-vitamins is their concentrated doses of vitamins that are mixed to create one pill.

Headaches And Fatigue

Research published in the Behavioural Neurology journal highlights that over-supplementation of vitamins A and D can result in weakness, fatigue, or reduced energy levels. Vitamins A and B6 have been linked to headaches and fatigue, which can be experienced by those who consume multivitamins over the counter.

Can Daily Multivitamins Interfere With Medicines?

Research published in the Cureus journal suggests that daily intake of multivitamins can interact with blood thinners, diabetes medications, thyroid drugs, and even antibiotics.

The exact timing of consuming multivitamins influences how they are absorbed and any potential side effects that they can cause. Timing also influences how the multivitamins can interact or react when their effect is mixed with the formulation of prescribed drugs.

Note: A medical professional should be consulted for a safe approach to consuming multivitamins.

Warning Signs You May Be Taking Too Many Vitamins

If your body has an overload of vitamins, then it can lead to warning signs such as the following:

  • Persistent nausea
  • Frequent headaches
  • Metallic taste
  • Hair loss
  • Constipation
  • Unexplained fatigue

Who Should Be Especially Careful?

People who fall under these categories should be especially careful of their multivitamin intake, as they can harm them significantly:

  • Smokers
  • People with kidney disease
  • Liver disease patients
  • Older adults
  • Children
  • Those taking multiple supplements

How To Take Multivitamins Safely

Multivitamins need to be consumed safely by following a blood panel and doctor consultation, and medical monitoring is necessary. You also need to:

  • Check ingredient labels for the exact vitamin dose in your multivitamin tablet.
  • Avoid doubling up on supplements as they can interact with each other.
  • Follow RDA (Recommended Daily Allowances) recommendations.
  • Use supplements only when needed or when prescribed.
  • Seek medical advice for deficiencies, as your body should be able to absorb them effectively.

Food First, Supplements Second

The decision to consume multivitamins should be carefully weighed against natural food sources. A thorough discussion should be taken after a dietician or nutritionist consultation, as a balanced diet could fulfil your multivitamin needs. Whole foods contain a composition that is best suited to the body, as it can readily absorb the vitamins as needed. Multivitamin consumption can't replace the benefits of healthy eating.

With the consumption of multivitamins, you need to be careful of their side effects. The possibility of nutrient imbalances and mineral overload, as well as vitamin toxicity, increases exponentially. Always consult a doctor before using supplements, as they can help you better understand your body's nutritional needs rather than making popping a multivitamin a daily habit.

Also Read: What Is The Best Time To Take Vitamin B12 Supplements? 5 Tips For Maximum Absorption



Disclaimer: This content including advice provides generic information only. It is in no way a substitute for a qualified medical opinion. Always consult a specialist or your own doctor for more information. NDTV does not claim responsibility for this information.