Multivitamin and mineral supplements do not typically cause weight gain. In fact, several studies suggest that these supplements may have the opposite effect, particularly in specific populations.
For instance, a study by Li et al. found that multivitamin and mineral supplementation in obese Chinese women resulted in significant reductions in body weight, body mass index (BMI), and fat mass, along with improvements in lipid profiles and energy expenditure.[1] Similarly, Major et al. reported that multivitamin and mineral supplementation during a weight-reducing program did not lead to weight gain and was associated with reduced appetite ratings in women.[2]
Additionally, long-term use of multivitamins has been associated with less weight gain in overweight or obese individuals, as shown in the VITamins And Lifestyle (VITAL) cohort study.[3] This suggests that multivitamin and mineral supplements may help in weight management rather than contributing to weight gain.
In summary, the current evidence indicates that multivitamin and mineral supplements are unlikely to cause weight gain and may even support weight management in certain populations.
References
1) Effects of Multivitamin and Mineral Supplementation on Adiposity, Energy Expenditure and Lipid Profiles in Obese Chinese Women. Li Y, Wang C, Zhu K, Feng RN, Sun CH. International Journal of Obesity (2005). 2010;34(6):1070-7. doi:10.1038/ijo.2010.14.
2) Multivitamin and Dietary Supplements, Body Weight and Appetite: Results From a Cross-Sectional and a Randomised Double-Blind Placebo-Controlled Study. Major GC, Doucet E, Jacqmain M, et al. The British Journal of Nutrition. 2008;99(5):1157-67. doi:10.1017/S0007114507853335.
3) Dietary Supplements and Weight Control in a Middle-Age Population.
Nachtigal MC, Patterson RE, Stratton KL, et al. Journal of Alternative and Complementary Medicine (New York, N.Y.). 2005;11(5):909-15. doi:10.1089/acm.2005.11.909.
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The information provided is for educational and informational purposes only and is based on scientific research available at the time of writing. It is not intended as medical advice, diagnosis, or treatment. Food supplements should not be used as a substitute for a balanced diet or professional healthcare guidance. Always consult with a qualified healthcare provider before starting any new supplement regimen, especially if you have pre-existing health conditions, are pregnant or nursing, or are taking medications. The effects of supplements can vary from person to person, and scientific research is constantly evolving. The author and publisher are not responsible for any adverse effects resulting from the use or misuse of the information provided.