Can Vitamin D cause weight loss?

The sunshine vitamin is best known for the role it plays in bone health. But vitamin D has been shown to help prevent cancer, heart disease, autoimmune diseases, influenza, and type 2 diabetes. Benefits don’t end there. Vitamin D has also been shown to have an impact on our weight.

Nutrition

Boost weight loss with the sunshine vitamin

TL;DR: Vitamin D deficiency is fairly common in modern society. We are spending more time inside, not getting enough time in the sun. Prioritise your intake of the sunshine vitamin (Vitamin D) for your weight loss, bones, and general health.

Covid put the spotlight on Vitamin D. It plays a role  in strengthening the immune system. But the benefits of this micronutrient don’t end there.

The sunshine vitamin is best known for the role it plays in bone health. But vitamin D has been shown to help prevent cancer, heart disease, autoimmune diseases, influenza and type 2 diabetes. It is also useful in the management of depression and anxiety1

Benefits don’t end there. Vitamin D has also been shown to have an impact on our weight2.

 

The chicken of the egg?

Low vitamin D levels in the blood have been associated with a higher body mass index and body fat percentage in obese people3. This has led scientists to investigate whether or not addressing a poor vitamin D status has an impact on a person’s weight loss efforts.

First we need to know what causes the problem. Some believe that it is a result of lifestyle factors such as not spending enough time in the sun or failing to eat foods that are rich in vitamin D. It could also be related to genetic factors and lower levels of the enzyme required to convert vitamin D to its active form4

Scientific evidence has many researchers questioning whether the vitamin deficiency causes obesity or if it is the other way around. Did the chicken come before the egg? But many studies have shown that by taking a cholecalciferol supplement - the active form of vitamin D - you can drop your BMI and your waist circumference5.

 

How does vitamin D boost weight loss?

Being overweight with a high body fat percentage results in many physiological and biochemical changes in the body. Vitamin D has been shown to address some of these metabolic abnormalities and the tissue damage that occurs as a result of these changes5.

Supplementing with the active form of vitamin D has been proposed to have an impact on these mechanisms5:

  • Controlling the number of new fat cells created
  • Controlling the amount of fat deposited in the fat cells
  • Increasing calcium absorption from the intestines
  • Increasing insulin sensitivity resulting in better blood sugar control

The neurotransmitters, serotonin and dopamine, are recognised not only for their effect on our mood, but also for their role in suppressing the appetite. Vitamin D boosts the levels of serotonin resulting in you feeling full quicker and for longer. It also naturally reduces the number of calories you eat6.

 

How much Vitamin D do you need?

Everyone needs to meet their daily requirements for all micronutrients for the body to function at its best. The current recommended intake for vitamin D is 600 IU for people under the age of seventy and 800 IU for anyone older than that. These recommendations are based on its benefit for bone health7.

More important is your blood levels of vitamin D. If it is low, you will need to make some changes to try and bring it up.

Exposing your skin to the sun for fifteen to twenty minutes per day is the best way to get vitamin D. Your body has the ability to produce the vitamin when ultraviolet rays penetrate the skin.

There are only a few food sources of this nutrient. Include the following foods in your diet to boost your vitamin D intake: dark oily fish, fortified dairy products, and eggs8. Did you know that giving your mushrooms a suntan increases the levels of vitamin D they contain9? Place them in the sun for fifteen minutes before cooking them.

 

References

  1. DeLuca H. Overview of general physiologic features and functions of vitamin D. The American Journal of Clinical Nutrition. 2004;80(6):1689S-1696S.
  2. Perna S. Is Vitamin D Supplementation Useful for Weight Loss Programs? A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Medicina. 2019;55(7):368.
  3. Arunabh S, Pollack S, Yeh J, Aloia J. Body Fat Content and 25-Hydroxyvitamin D Levels in Healthy Women. The Journal of Clinical Endocrinology & Metabolism. 2003;88(1):157-161.
  4. Pereira-Santos M, Costa P, Assis A, Santos C, Santos D. Obesity and vitamin D deficiency: a systematic review and meta-analysis. Obesity Reviews. 2015;16(4):341-349.
  5. Perna S. Is Vitamin D Supplementation Useful for Weight Loss Programs? A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Medicina. 2019;55(7):368.
  6. Halford J, Harrold J. 5-HT2C Receptor Agonists and the Control of Appetite. Handbook of Experimental Pharmacology. 2011;:349-356.
  7. How much vitamin D do you need? - Harvard Health [Internet]. Harvard Health. 2021 [cited 29 October 2021]. Available from: https://www.health.harvard.edu/staying-healthy/how-much-vitamin-d-do-you-need
  8. Taking too much vitamin D can cloud its benefits and create health risks - Harvard Health [Internet]. Harvard Health. 2021 [cited 29 October 2021]. Available from: https://www.health.harvard.edu/staying-healthy/taking-too-much-vitamin-d-can-cloud-its-benefits-and-create-health-risks
  9. Cardwell G, Bornman J, James A, Black L. A Review of Mushrooms as a Potential Source of Dietary Vitamin D. Nutrients. 2018;10(10):1498.

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