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Does taking vitamins and supplements continuously for a long time really affect the liver?

Taking vitamins or supplements continuously for extended periods without medical advice or regular health checkups may increase the risk of liver damage. Especially fat-soluble vitamins or certain supplements that are difficult for the body to excrete. If accumulated in excessive amounts, it may cause liver inflammation or long-term health problems. Therefore, choosing vitamins should be done with caution, and only standardized products should be selected.

It's best to have a physical examination and assess your vitamin or mineral levels in your blood before starting to take vitamins or supplements. Because the test results will help determine which nutrients the body is actually lacking or having in excess. Some supplements may not be necessary at all, helping you plan your health and vitamin intake safely and tailored to your individual needs.


 This answer provides only preliminary information. Please schedule an appointment with a doctor for a detailed examination and information.

Are you taking more vitamins than you need, or the wrong supplements?
Skin nourishment with saline solution.

Do vitamins and supplements affect the liver?

  • In general, taking vitamins or supplements in appropriate and doctor-approved doses usually does not harm the liver in healthy individuals.
  • However, consuming "excessive" amounts or choosing substandard vitamins may risk "liver strain" or liver toxicity, especially fat-soluble vitamins such as...
    • Vitamins A, D, E, K
    • If consumed in excess and accumulated in the body, it may affect liver function and may cause hepatitis in some cases.
  • Some groups of dietary supplements. For example, various herbs, extracts, or untested substances may have a more harmful effect on the liver than vitamins, such as preservatives, chemicals, and contaminants.

health checkup

  • You should always check your vitamin and mineral levels beforehand.
    D' Lovevery Clinic focuses on blood tests to assess the balance of vitamins and minerals in the body.
  • Specific analysis เช่น
    • Check your vitamin D3 levels to see if you're getting enough or too much, as a deficiency may increase the risk of osteoporosis and a weakened immune system.
    • If taken in excessive amounts, such as through continuous high doses of vitamin D, it can cause toxicity, which has been reported to affect the liver and kidneys.
    • These screening programs can help you determine your "health status" and adjust your vitamin supplements safely.

Preventing side effects and maintaining liver health.

  • Choose vitamins that are certified by the Thai Food and Drug Administration (FDA) or as recommended by your doctor.
  • Monitor and have regular health checkups. Especially for those who need to take vitamins or supplements long-term.
  • Avoid taking multiple vitamins or supplements simultaneously without consulting a doctor.
  • If you experience any unusual symptoms such as nausea, jaundice (yellowing of the skin and eyes), or unusual fatigue, stop using the product immediately and have a health checkup.

Other frequently asked questions