Your body needs a certain amount of essential vitamins and minerals to function properly. What happens when you don’t get enough of them? What happens when you eat too little food, or when the food you eat isn’t sufficiently nutritious? Perhaps our bodies catch on and reply by increasing hunger levels. After all – if we eat more, we increase the chances of consuming enough of whatever nutrient we are lacking.
On the other hand, reliable access to vitamins and minerals could perhaps mean decreased hunger levels and decreased cravings, thereby promoting weight loss.
The above is, of course, speculation. But there are well-performed studies which suggest it might not be far from the truth.
A lack of vitamin D is probably the most common deficiency in northern countries such as Canada, or most of the US. Three recent studies indicate that, when compared to a placebo, a vitamin D supplement can decrease your fat weight or waist measurement [1 2 3].
In one of the studies, 77 overweight or obese women received either a supplement of 1000 units of vitamin D, or a placebo, every day for 3 months. Those who took the vitamin D supplement decreased their body fat by 2.7 kg (6 pounds) – significantly more than the placebo group, who hardly decreased their fat weight at all.
A study from 2010 involved around a hundred women with weight issues, separating them into three groups. One group received a daily multivitamin supplement, the other a daily calcium supplement, and the last group only a placebo. The study went on for six months.
Unsurprisingly, the results showed that nothing had happened to the weight of the women receiving calcium or the placebo. However, the group which took the multivitamin lost more weight – about 3 kg more – and improved their health markers. Among other things, their basal metabolic rate (the rate at which the body burns calories when at rest) increased.
Furthermore, another earlier study found that subjects decreased hunger levels by taking multivitamin supplements during starvation diets, compared to a placebo.
Nutrient-dense, good food is certainly the foundation of weight loss. But an adequate amount of vitamin D can be difficult to ingest via food. In the case of a lack of sun (such as during the darker months of fall and winter), it’s wise to supplement for multiple health reasons – and perhaps even for your weight.
If you’re overweight and not entirely sure that your diet provides enough nutrients, it may be worthwhile to take a multivitamin pill. Unfortunately, they still contain only minimal doses of vitamin D, so you need both for the full effect.