This is Why I NEVER Take Vitamin A Supplements
Dr. Eric Berg DCPublished on June 20, 2025
Summary authored by editor@wellifi.com
TLDR Summary
Vitamin A plays a crucial role in maintaining skin health, vision, and immune function, but both deficiency and excess can lead to serious health issues. Natural sources of vitamin A are recommended over synthetic supplements to avoid toxicity and associated health risks.
Key Points
- Vitamin A is essential for skin health, immune function, and vision.
- Deficiency in vitamin A can lead to immune deficiencies, vision problems, and abnormal bone development.
- Excess vitamin A, particularly from synthetic sources, can cause toxicity with symptoms that mimic deficiency.
- Natural sources of vitamin A include cod liver oil, egg yolks, and liver, which minimize the risk of toxicity.
- Synthetic vitamin A supplements have been linked to increased risks of lung cancer, especially in smokers or heavy drinkers.
The Complex World of Vitamin A: Benefits, Risks, and Sources
Vitamin A, often hailed as the non-caring vitamin due to its crucial role in preventing keratinization and maintaining skin health, embodies a paradox of being both indispensable and potentially hazardous to our health. This vitamin is essential for the epithelial layers of the skin, immune system function, and even the absorption of iodine, yet its deficiency or excess can lead to severe health issues.
The Positive Side of Vitamin A
Vitamin A plays a pivotal role in maintaining the health of our skin, both externally and internally, acting as a barrier against pathogens and thus bolstering our immune system. This vitamin is also involved in regulating T regulatory cells, which are essential in preventing autoimmune diseases such as Graves' disease or Hashimoto's thyroiditis. Moreover, vitamin A is crucial for night vision, and its deficiency can result in vision problems, immune deficiencies, skin issues, and abnormal bone development in children.
The Dark Side of Vitamin A
Despite its benefits, an excess of vitamin A can lead to a host of symptoms that paradoxically mimic those of its deficiency, including abnormal bone formations, dry skin, and even intracranial pressure. The most common source of toxicity is synthetic vitamin A supplements, which is why it is recommended to obtain this vitamin from natural food sources.
Understanding Synthetic Vitamin A Risks
Synthetic forms of vitamin A, including beta-carotene supplements, have been linked to increased risks of lung cancer, especially in smokers or heavy drinkers. These findings underscore the importance of choosing natural sources of vitamin A to avoid potential health risks.
Natural Sources of Vitamin A
Natural sources of vitamin A include cod liver oil, egg yolks, grass-fed butter and cheese, and liver. These foods provide the active form of vitamin A (retinol) or its precursor (beta-carotene) in a form that minimizes the risk of toxicity. The body's inefficient conversion rate from beta-carotene to retinol further reduces the risk of overdosing on vitamin A when it is sourced from food.
Conclusion
Vitamin A is a double-edged sword, vital for numerous bodily functions but dangerous in excess. The safest approach to harnessing its benefits without risking toxicity is to prioritize natural food sources over synthetic supplements. Always consult with a healthcare provider before making any changes to your dietary or supplement regimen.