Vitamin A benefits

Vitamin A is also known as ”anti-dry eye vitamin”. Although not as popular as vitamin D. But don’t underestimate. If the body is missing, it will cause big problems! Vitamin A is one of the essential nutrients for humans. The precursor of vitamin A is carotenoids found in a variety of plants.

(Small knowledge: The family of carotene has more than 600 members. About 50 of them are common in food. The most important ones are alpha-carotene and beta-carotene. They come from yellow and orange fruits and vegetables. Such as carrots, papayas and pumpkins, etc. Green vegetables such as kale, broccoli also contain carotene. Stored in the lungs, adrenal glands, prostate and yellow areas of the eye. Carotene can activate vitamin A. Prevent night blindness and Vision loss can also moisturize the eyes. Prevent eye inflammation, and prevent and improve macular degeneration, cataract, dry eye, eye fatigue and other eye problems. It is very important to protect the eyes. Many studies have shown that eating more carrots Vegetarians (especially beta-carotene foods) help reduce the chance of developing yellow spots.)
Vitamin A is not a single compound. There are many different types. Animals can convert carotene into vitamin A in the body and store it in the liver. It is usually present in the form of alcohols. Called ”retinol”, activity is also the highest. But some are also aldehydes, called ”retinal”; others are acids, called ”retinoic acid”.
Retinol and retinal mainly regulate the visual cycle of rod cells. The retinoic acid is mainly related to the differentiation of epithelial tissues in the human body. Therefore, some retinoic acid derivatives (commonly known as A acid) are often used in the treatment of skin diseases. There is also a retinyl ester. It is the main form of fat-soluble vitamin A in the human body.

Why should I add vitamin A?

Vitamin A is a component of the photoreceptor in the retina. It is a nutrient that protects the eyes and enhances vision. If it is lacking, it will cause epidermal keratinization of the conjunctiva. This will block the lacrimal gland. This leads to dry eye syndrome. Even caused conjunctivitis. Insufficient vitamin A can cause night blindness. Because of the lack of photoreceptors in the retina.

Vitamin A is also a regulator of bone marrow cell differentiation. The regulation of vitamin A is required for hematopoietic cells including bone marrow. Vitamin A is also required for epithelial tissue differentiation.

How to add it?

It only contains vitamin A supplements. It is a relatively rare type. It is easier for us to see the trace of vitamin A in the compound product. But when choosing vitamin A health foods. It is important to confirm that the product contains vitamin A or beta-carotene. Why do you say that? This is because excessive intake of vitamin A can cause toxicity. But beta-carotene won’t. Therefore, when choosing such products, you must pay special attention to whether vitamin A or beta-carotene is used. The method of judgment is very simple. Please go straight to see the food ingredient list!

Production recommended

Product name:NOW Supplements, Certified Organic, Spirulina 1000 mg

Cheap website:

Overall ranking:#2402

Product intorduction

• These tablets are an easy way to get a daily dose of this nutrient rich superfood featuring beta-carotene (Vitamin A) and  Vitamin B-12.
• This double strength product has twice the Spirulina (1,000 mg per tablet) as in our regular strength product (500 mg per tablet).
• USDA Organic, Non-GMO, Genuine Whole Foods, Quality GMP Assured, Vegan/Vegetarian, Soy Free, Sugar Free
• GMP Quality Assured: NOW closely adheres to both mandatory U.S. FDA Current Good Manufacturing Practices (CGMP) regulations and voluntary Natural Products Association (NPA) Good Manufacturing Practices (GMP) regulations. Good manufacturing practices ensure compliance with sanitation, processing, documentation, and testing requirements that are designed to promote consistent, highly reproducible product quality and safety.

Good and bad


PRO#1: Prevent cancer!?

Cancer is a cell abnormal mutation. Want to prevent cell mutations. It is necessary to prevent the gene from being disturbed first. To prevent gene interference. It is necessary to prevent the increase of free radicals first. Beta Carotene is one of the carotenoids. Not the same as other antioxidants. Because its molecular structure is special. Carotenoids can tolerate 10 to 20 attacks of free radicals. So carotenoids can trap free radicals. When carotenoids are resistant to free radicals. Other antioxidants can make the defense network more complete. But it violates the normal state of nature. Eat a lot of nutrients. May increase the risk of cancer. The most suitable physiological requirement for the species is the natural and complete food!

PRO#2: Protect eyes

Beta-carotene can promote the normal content of rhodopsin. Avoid the lack of vitamin A caused by dark field adaptation. It also avoids damage to the eyes caused by strong light after dark vision. It can also prevent night blindness, dry eye, corneal ulcer and corneal softening.


Beta-carotene can neutralize peroxidic free radicals in the body. This can delay aging.


Excessive consumption can cause carotenodermia. But it is harmless to the human body. Only the skin will be pigmented.

Bad#2:Increase the risk of cancer

Studies have shown that overdose increases the risk of cancer.


This product has 310 reviews. Of these, 269 were positive comments. Accounted for 86.77%. Most comments indicate that taking this product can boost your spirit. But there are also a few who don’t feel it. If you are a vegetarian you want to add nutrients. You can consider purchasing this product.


7 thoughts on “Vitamin A benefits

  1. To be honest, I never know what vitamin A was good for until I read this post.  Very interesting and thorough.  The fact that it can help protect you from cancer and your eyes is a plus.  I didn’t know too much of it could hurt you but I guess too much of anything is bad for you.  I will definitely keep an eye on my labels to make sure I’m getting the proper amount of vitamin A.  Do you know anyone who has taken too much?

    1. Taking too much can cause caroteneemia. Carotene content is too high and deposited on the skin, making the skin yellow. However, it is more common in children under 3 years old, and it is most common in children from 6 months to one year old. Usually, if you reduce your intake, you will slowly recover.

  2. I did not know that Spirulina was good for the eyes!  I have taken this supplement for the B-12 and for much-needed energy.  I am getting two things for one.  

    You said that it prevents cancer, but an overdose will cause cancer.  Do you know how much is too much?  Or, how is a person to test whether or not he is taking too much?

    Great article!  Karen

    1. Current research shows that vitamin A precursor, carotenoids, is safe. If there is enough vitamin A in the body, the body will reduce the amount of carotenoids converted into vitamin A. Upper limit for adults over 19 years: 3000 μg / day. Overdose may cause liver pathology Changes include the appearance of sinusoidal cells with naturally green fluorescence,Perisinusoidal cell fibrosis and cell swelling, and Ito cell swelling etc.

  3. This is actually a large amount of knowledge that you are giving regarding the benefits of Vitamin A Alexa.  Not small knowledge at all.  

    I had no idea that there were so many natural sources of Vitamin A, or that that particular vitamin and its precursor, the Carotenoids had so many benefits to offer us.

    Which variety of vegetables would give us the most Carotenoids.  Would it be the yellow and orange colored ones, or the green ones?

    1. Sweet potatoes, carrots, and dark green vegetables are the most abundant. Carotene and beta-carotene are collectively called vitamin A. They are usually found in orange-yellow vegetables (green-yellow). The darker the color, the more the content.

  4. Thanks a lot for putting together this great post. It’s incredible how few information resources there are online in regards to dry eye syndrome as well as some others sight-related issues.

    In regard to your recommendation, I like it to be certified organic. Cancer is one of the major concerns. Due to our lifestyle and poor diet, we face cancer risk on a daily basis.

    It’s really important to fight and provide our bodies with the needed vitamins and nutrients to fight against this and other catastrophic medical conditions. Thank you for this great post!

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