Some supplements can be hard to digest for a number of reasons, including:
- ConcentrationThe nutrients in multivitamins are highly concentrated and can irritate the stomach.
- Taking on an empty stomachTaking supplements on an empty stomach can cause nausea and is less efficient for absorption. Food can neutralize stomach acid and help with absorption.
- Fat-soluble vitaminsVitamins A, D, E, and K are fat-soluble and require fat to be absorbed. You can take them with a little healthy plant-based fat, like avocado or nuts.
- Vitamin or mineral contentSome vitamins and minerals, like vitamin C, folate, vitamin E, and iron, can increase stomach acid production. Exceeding the recommended upper limit for these supplements can also cause nausea and cramping.
- Tablet or capsule casingThe casing of traditional tablets or capsules can make it harder for the body to absorb vitamins. Tablets with a shiny, waxy coating or added sweeteners can also make it difficult for the body to absorb vitamins.
- Fish oilFish oil can cause heartburn or reflux for people who are sensitive to oils or high-fat content.
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