I'd love to hear what your experience has been with using multivitamins and how much time before you noticed effects. Let me know in the comments below.
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Your email address will not be published. Download your Free Guide. Without Getting Fat! Total Shape is a reader-supported site. Purchases made through links may earn a commission. Learn more. Published by Isaac Robertson. Deficiency Levels 2. Supplement Form 3. Water-Soluble vs Fat-Soluble Vitamins 4. Lifestyle and Health Issues.
Deficiency Levels How deficient you are is the most important factor on which it depends how long before a vitamin kicks in. Supplement Form. Not every vitamin has the same dosage, quality, nor ingredients. Heart disease is one of the leading causes of death worldwide 7. Some studies suggest that multivitamins are correlated to a reduced risk of heart attacks and death, while others show no effects 8 , 9 , 10 , However, a more recent study revealed that among women — but not men — taking a multivitamin for more than 3 years was linked to a lower risk of dying from heart disease While some studies indicate that people who take multivitamins have a lower risk of heart disease, others have found no connection.
Overall, the evidence is mixed. Some studies suggest no effect on cancer risk, while others link multivitamin use to increased cancer risk 9 , 11 , 14 , One review examined five randomized controlled trials including 47, people.
Two observational studies, one including only women and the other including both men and women, tied long-term multivitamin use to a reduced risk of colon cancer 17 , Multivitamins have been studied for several other purposes, including promoting brain function and eye health. Several small studies examining specific populations have found that multivitamins can improve memory in older adults 20 , 21 , Multivitamins may also affect your mood.
Research has not only revealed links between poor mood and nutrient deficiencies but also between nutritional supplements and reduced symptoms of anxiety and depression 23 , 24 , 25 , 26 , 27 , However, other studies reveal little to no changes in mood 29, Age-related macular degeneration is one of the leading causes of blindness worldwide One study found that taking antioxidant vitamins and minerals may slow its progression and help prevent it 32 , 33 , Furthermore, some evidence indicates that multivitamins may reduce your risk of developing cataracts, another widespread eye disease 35 , 36 , Multivitamins may help improve your memory and mood.
Although high doses of some vitamins and minerals are acceptable for some people, high amounts can be harmful. Pregnant people need to be especially careful with their vitamin A intake, as excessive intakes have been linked to congenital disabilities Vitamin D toxicity is rare and unlikely to develop from multivitamin use.
However, vitamin A toxicity is more common 39 , 40 , 41 , If you take multivitamins and eat many nutrient-dense foods , you could exceed the recommended daily intake of many nutrients. Smokers should avoid multivitamins with large amounts of beta carotene or vitamin A, as these nutrients may increase your risk of lung cancer 43 , High doses of certain minerals, such as iron, can lead to stomach upset, constipation, vomiting, and fainting.
Particularly, men should be mindful of their iron consumption, as they tend to store more of it than women do, as well as individuals who have hemochromatosis. This condition can lead to a buildup of toxic levels of the mineral and may cause liver cirrhosis , liver cancer, and heart disease.
Those with this condition should also avoid vitamin C supplements Another risk is faulty manufacturing processes, which may cause multivitamins to harbor much larger amounts of nutrients than intended Related Story.
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