From supporting your skin’s natural glow to maintaining overall health, Vitamin A works in ways most people overlook. Dive in to uncover its full impact.
Vitamin A is a fat-soluble vitamin. When compared to water-soluble vitamins which are excreted from your body easily, vitamin A is stored in your liver, so it is readily available whenever required.
There are two main types of Vitamin A:
- Pre-formed Vitamin A (Retinoids): Obtained from animal sources such as dairy products, fish and meats. It already is in active form and can be used by the body immediately.
- Pro-vitamin A (Carotenoids): Obtained from vegetables and fruits. These are converted to active Vitamin A within the body.
7 Powerful Health Benefits of Vitamin A
1. Supports Healthy Vision
- Vitamin A is best-known for maintaining the vision. The vitamin is an important part of rhodopsin which is responsible for the ability to see at low light levels.
- Vitamin A keeps cornea, which is the outer covering of the eye well-lubricated.
- Vitamin A deficiency leads to Night Blindness where one can see in daylight but have decreased vision in darkness.
- Apart from ensuring good vision, vitamin A is also essential in preventing eye disorders including age-related macular degeneration (AMD), which is one of the main reasons behind vision impairment in aged people. [1]
2. Boosts Your Immune System
- This vitamin is referred to as the anti-infective vitamin. It plays a significant role in the formation of the mucus barriers in the eyes, lungs and intestines. The mucus barriers form a “trap” that holds pathogens before they invade the body.
- Vitamin A is also essential for the formation of white blood cells that assist in trapping and eliminating bacteria from your blood system.
- In this case, lack of vitamin A may result in increased vulnerability to infection because it will take longer to recover when infected. [2]
3.Supports Bone Metabolism
- Calcium and Vitamin D take all the credits for bone health. We mustn’t forget about Vitamin A which plays an important role in bone metabolism. Those who have enough Vitamin A have a reduced chance of bone fractures as they age. [4]
- On the other hand, either insufficient or too much Vitamin A can be detrimental as insufficient amounts affect bone growth and excessive amounts cause more bone fractures. Thus, the need to have the right amount of Vitamin A is important for bone health.
4. Supports Healthy Reproductive System
- Vitamin A can be considered a must for both sexes. It helps men produce sperm cells while ensuring a healthy egg and proper fertilization in women.
- Animal studies on the role of vitamin A in male fertility indicate that a lack of this vitamin interferes with sperm cell development, resulting in infertility. [5], [6]
- Similarly, research on animals indicates that a deficiency of vitamin A in females might interfere with reproduction, since it affects egg quality and their implantation in the uterus. [5]
5. Supports Healthy Embryonic Development
- When a woman is pregnant, the role of Vitamin A is that of a blueprint for the fetus’ growth. Vitamin A is vital for embryo development since it controls cell differentiation and gene expression.
- The formation of the heart, nervous system, eyes, ears, limbs and lungs requires adequate amounts of this nutrient. [7]
- Severe Vitamin A deficiency (VAD) or excessive consumption of the vitamin during pregnancy leads to congenital abnormalities or fetal demise.
6.Reducing Cancer Risk
- According to studies, carotenoids (pro-vitamin A) have been found to lower the probability of developing various types of cancers such as skin, lung and mouth cancer. [8], [9]
- This vitamin is known for its antioxidant effects which help in defending the body against damage caused by free radicals thus lowering the likelihood of cancer.
- Though vitamin A from food sources is effective in preventing cancer, taking supplements of high amounts has not shown any effect on cancer prevention and may actually heighten the risk of lung cancer among smokers.
Still further research is required to confirm the relation of Vitamin A and cancer prevention.
7. Promotes Skin Health and Clears Acne
- Vitamin A has strong antioxidant properties and assists in neutralizing free radicals within the body. It guards against oxidative stress, which is one of the main causes of premature aging. In addition to ensuring that skin cells continue regenerating, it prevents premature aging.
- It increases collagen production to reduce wrinkles and fine lines on the skin. The immune boosting capabilities of vitamin A also offer protection from premature aging.
- A deficiency in Vitamin A may cause skin cells to age prematurely and become more vulnerable to damage. Acne can be caused by inflammation.
- Vitamin A helps manage cell regeneration to make sure dead skin doesn’t block your pores. That’s why prescription creams for your skin (such as retinoids) contain Vitamin A. [3]
Vitamin A Intake: Dosage and Food Sources
The Daily Requirements of Vitamin A is as follows:
Category
Recommended Daily Allowance
Source: Mayo Clinic
- Consuming excessive amounts of Vitamin A supplements may lead to adverse effects on your health.
- People who consume a wide range of foods do not require vitamin A supplements.
- While taking Vitamin A for its antioxidant capabilities, it is important to remember that the supplements may not work like vitamins found in natural sources.
Natural Food Sources of Vitamin A
- Vegetable Superfoods: Sweet potatoes (king of Vitamin A), carrots, spinach and kale.
- Animal-based Sources: Beef liver, salmon, eggs and enriched milk.
The Risks of Excess Vitamin A
- Vitamin A is stored in your body as it is a fat-soluble vitamin. This directly implies that consuming it in larger quantities can lead to toxic levels in the body.
- Hypervitaminosis A is a dangerous medical state that results from an overloading of vitamin A within the body due to overconsumption of vitamin supplements and foods like animal liver.
- Acute Danger: If consumed in large amounts all at once, Vitamin A may cause lightheadedness, vomiting and serious headaches.
- Long-Term Danger: Chronic use of Vitamin A may result in damage to the liver, joint pain, increase the risk of bone fractures and even malformations when pregnant.
The Bottom Line
Vitamin A plays an important role in health as a shield for one’s sight and also ensures the optimal state of one’s immune and skin health. This vitamin is vital not only for good health but also for reproductive success and proper embryo development.
The reason why it is crucial to keep a certain balance of vitamin A is its storage in the liver, as excessive consumption might lead to toxicity.
Therefore, the safest way to consume this vitamin in sufficient amounts is through natural food sources rather than supplements until prescribed by a medical expert.
References
[2] PubMed: Increased risk of respiratory disease and diarrhea in children with preexisting mild vitamin A deficiency
[3] Journal of Nutrition and Food Sciences : Role of Diet in Dermatological Conditions
[4] PubMed: The Effect of Vitamin A on Fracture Risk: A Meta-Analysis of Cohort Studies
[5] PubMed Central: Vitamin A in Reproduction and Development
[6] PubMed: The Role of Retinoic Acid (RA) in Spermatogonial Differentiation
[7] PubMed Central: Enzymatic Metabolism of Vitamin A in Developing Vertebrate Embryos
[8] PubMed: Retinoids and their receptors in cancer development and chemoprevention
Pingback: 4 Types of Dietary Fat: The Essential Guide to Healthy Fats - SuppFactsDaily
Pingback: 10 Skin Health Supplements to Support Radiant, Healthy Skin