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Side effects of vitamin A supplements are rare. Vitamin A toxicity is a rare concern associated with high levels of vitamin A over prolonged periods of time. Symptoms may include nausea, vomiting, headache, dizziness, irritability, blurred vision, and a lack of muscle coordination. [31]
Vitamin A deficiency-caused night blindness is a reversible difficulty for the eyes to adjust to dim light. It is common in young children who have a diet inadequate in retinol and β-carotene. A process called dark adaptation typically causes an increase in photopigment amounts in response to low levels of illumination. This increases light ...
Vitamin deficiency is the condition of a long-term lack of a vitamin. When caused by not enough vitamin intake it is classified as a primary deficiency, whereas when due to an underlying disorder such as malabsorption it is called a secondary deficiency. An underlying disorder can have 2 main causes:
Winter erectile dysfunction could be caused by a variety of factors, including seasonal hormonal fluctuations, low vitamin D levels, seasonal depression, or lifestyle changes like reduced physical ...
3. Diet. You are what you eat — and what you eat (or don’t eat) can affect your hair health. Certain diets, particularly those that lead to deficiencies in minerals and vitamins such as ...
Women were more likely to be affected by micronutrient deficiencies than men. Vitamin D deficiency was the most common deficiency, with a prevalence of over 60% among people with type 2 diabetes ...
Preformed vitamin A is fat-soluble and high levels have been reported to affect metabolism of the other fat-soluble vitamins D, [24] E, and K. The toxic effects of preformed vitamin A might be related to altered vitamin D metabolism, concurrent ingestion of substantial amounts of vitamin D, or binding of vitamin A to receptor heterodimers ...
Low testosterone or testosterone deficiency, also known as hypogonadism, is a condition in which patients develop symptoms. Low testosterone or testosterone deficiency, also known as hypogonadism ...