Decreased Intake

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Decreased Intake

Decreased intake of vitamin D is one of the most common cause of deficiency. This is especially true in those that follow a strict vegan diet. Because most of the natural sources of vitamin D are animal based (egg yolk, beef liver, fish, and fish oils), people who do not consume any animal-based products (e.g. vegans) must be sure to get their daily intake of vitamin D from supplements or risk being deficient.