Studies included in the review administered vitamin D at varying doses, frequencies, and lengths of time, and in different forms such as tablets, drinks, and injections. What the research tells usĪ recent systematic review and meta analysis explored whether vitamin D supplementation improved blood sugar control in adults with type 2 diabetes. New studies have assessed if vitamin D supplementation helps in the management of type 2 diabetes (1). This is an important finding because vitamin D is known to help regulate insulin levels (8). Many people with diabetes are low in vitamin D (7). In fact, almost 34% of Canadians took some kind of supplement that contained vitamin D in 2015 (6). Most foods however, are not a great source of vitamin D (3 4 5), which has resulted in many taking supplements to boost their vitamin D levels. Vitamin D is also found in small amounts in some foods such as oily fish (mackerel, sardines and tuna) (3 4 5), as well as foods fortified with vitamin D such as dairy products, breakfast cereal, and orange juice (3). However, the amount of vitamin D created can be hindered by a variety of factors including cloud cover, time of day, and smog (3). Known as the “sunshine vitamin”, vitamin D is created in your skin in response to direct sunlight (3 4 5). Vitamin D supplementation has emerged as a possible solution (1). As type 2 diabetes rates continue to soar, there is an urgent need to find effective ways to tackle this disease. Similarly, the growing worldwide epidemic of type 2 diabetes has also been in the spotlight – with an estimated 400 million people affected currently, and this number expected to be 642 million by 2040 (1 2). The many positive health impacts of vitamin D have dominated the supplement world in recent years.
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