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Key points Vitamin A is fat soluble and can be obtained directly or indirectly from food A deficiency of vitamin A can cause night blindness Humans cannot synthesise vitamin C so must obtain it directly from their diet Vitamins A and C are essential for maintaining healthy skin and a healthy immune system Chronic vitamin C deficiency may result in scurvy Also in this series Vitamin B complex: B group vitamins and their role in the body Vitamin D: the sunshine vitamin, its role and the effects of deficiency Vitamins E and K: their role and the effects of deficiency Macrominerals: exploring the role of inorganic macronutrients Magnesium and microminerals: roles, deficiency and excess The next article in the series examines the large family of water-soluble B vitamins

doi: 10.1111/dom.12935 22 TomasAJonesBLeechC

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Frequently asked questions A medically assisted weight loss program may be right for you if you: Have a BMI of 30 or higher Have a BMI of 27 or higher with a chronic condition related to your weight Have struggled to lose weight through diet and exercise alone Your Fast Pace Health provider will determine eligibility and help ensure treatment is appropriate for you