Vitamin A and Carotene
Vitamin A
Vitamin A and Carotene
Vitamin A and beta carotene are often confused as the same thing, but they are not. This post will help you learn the differences between vitamin A vs beta carotene. You will also learn about the health benefits and risks of each. What is Vitamin A? Vitamin A is an essential fat-soluble vitamin that has wide roles in the body because it helps regulate genes in our bodies. For this reason, vitamin A is involved in cell growth, making cells different from each other, eye health, skin cell integrity, reproductive health, and more. Active vitamin A, or provitamin A, has several types found in foods. These include retinol, retinal, and retinoic acid. You must know that vitamin A in its active form is only found in animal foods, especially organ meats like beef liver, cod liver oil, eggs, and meats. Another important fact about these food sources is that they naturally contain other nutrients that help you absorb vitamin A, such as healthy fats.
What is Beta-Carotene? On the other hand, beta-carotene is often confused with vitamin A. Still, it is not active vitamin A. Pre-vitamin A. Beta carotene belongs to a class of antioxidants called carotenoids. These carotenoids, while healthy, don’t necessarily become vitamin A in the body in many circumstances. This is because the absorption of beta-carotene is poor. It is also difficult for the body to convert beta-carotene into active vitamin A due to several genetic tendencies that are quite common. For example, if you carry the BCM01 gene variant, as about 45% of the population does, you are much less likely to be able to make beta-carotene into vitamin A. You can help your body absorb beta-carotene by eating it with healthy fats like extra virgin olive oil. However, if you are like many with genetic variations that make it difficult to use beta carotene, you may not be able to rely on it as a good vitamin A source in your diet. Food sources of beta carotene include carrots, squash, pumpkin, leafy greens, mangos, apricots, and any dark orange, yellow, and red-colored fruits and vegetables.
Vitamin A vs Beta Carotene Vitamin A is more important than beta-carotene because vitamin A is essential while beta-carotene is not. There are 3 reasons that vitamin A is better than beta carotene. First, almost half of the population has a genetic variation that doesn’t allow for the efficient production of vitamin A from beta-carotene. Second, beta-carotene is poorly absorbed, with only about 3% absorbed into the body. Third, it takes 5 steps in the body to make beta-carotene into active vitamin A. These multiple steps mean that there are many ways that the conversion of beta carotene can be impaired. Both vitamin A and beta carotene have health benefits in the body in their ways, though, so let’s review those next.
Vitamin A Benefits Vitamin A is a critical nutrient for overall health. Its main roles in the body are to help maintain a healthy immune system, support normal eye function, protect the skin, and even play a role in brain health. Further, vitamin A may improve cognition and memory. Vitamin A is indispensable: as an antioxidant, it reduces the risk of many chronic diseases, including heart disease, diabetes, hypertension, autoimmunity, and cancer. It may also improve hormone production and gut health and even reduce the risk of obesity. Let’s take a closer look.
Vitamin A Regulates Genes Vitamin A is an active gene regulator and is important for reducing the body’s response to toxins and inflammation. It helps regulate over 100 genes in our bodies, which means that vitamin A is critical for maintaining optimal health. In other words, vitamin A may enhance what your mama gave you or prevent some genetically driven diseases.
Vitamin A for Healthy Immunity One of the most impressive benefits of vitamin A is that it helps keep your immune system intact. Vitamin A is involved in the front-line defense of the immune system by helping the body make the mucus layer of the respiratory tract and of the gut. This means that vitamin A helps keep germs flushed out of the body. Additionally, vitamin A helps improve the cellular production of innate and adaptive immunity, including macrophages, neutrophils, and T-cells. Interestingly, vitamin A deficiency may be related to getting severe influenza. To further support this, children with better vitamin A and D levels have improved immune responses to vaccines. Vitamin A also helps keep the immune system in check by dampening inflammation. This means that vitamin A may also reduce autoimmune disease symptoms. By regulating immunity, research shows that vitamin A may help decrease the chance of fat accumulation leading to obesity.
Vitamin A for Eye Health Vitamin A, in its active form called retinol, helps maintain visual perception by protecting the retina. Low vitamin A levels can lead to vision impairment, especially at night. This is often called night blindness. Vitamin A may help improve overall eye health and reduce the risk of eye diseases. Supplemental vitamin A as retinol may also reduce symptoms of age-related macular degeneration.
Vitamin A for Skin Health Retinols trigger surface skin cells to turn over quickly, allowing new cell growth underneath. By doing so, vitamin A as retinol helps the skin look younger. But skin health isn’t just about beauty. Healthy skin supports a healthy immune system by helping reduce the entrance of harmful bacteria and viruses into the body. Vitamin A as retinol also slows down collagen breakdown and helps thicken the deeper layer of skin. Interestingly, vitamin A may also help the body make more collagen in the skin. Vitamin A may also reduce skin cancer risk.
Vitamin A Reduces Heavy Menstrual Periods By regulating cell growth, vitamin A also plays a role in hormonal balance in the body. Additionally, vitamin A deficiency is related to an increased risk of having abnormal menstrual periods. Further, according to clinical research, using vitamin A supplements helps reduce the difficulty of heavy periods. Heavy periods were reduced in 92% of patients receiving vitamin A. While more research is needed in this area, vitamin A is a nice option for women who don’t want to take synthetic hormones to regulate their periods.
Vitamin A for Cancer Risk Reduction Vitamin A deficiency also impairs genes, which plays a role in cancer risk. Vitamin A, such as retinol, may reduce the risk of some kinds of cancer, such as colon, prostate, and pancreatic cancer. By dampening inflammation and supporting immune health, getting adequate vitamin A is essential for helping reduce the risk of many diseases, like cancer.
Vitamin A for Brain Health Beyond its commonly known functions, this fascinating antioxidant may even reduce the risk of memory loss that occurs in diseases like Alzheimer’s disease. This is because vitamin A plays a role in keeping brain synapses healthy in certain areas of the brain, like the hippocampus. The hippocampus helps us with new learning and memory. More research is needed in this area.
Vitamin A Balances Bone Health: vitamin A likely helps keep bones strong. A systematic review of 13 research studies showed that overall, vitamin A likely helps improve bone mineral density. However, both low and high levels of vitamin A can be harmful to bone health. Low levels of vitamin A are related to an increased risk of hip fractures, although not all research suggests this.
Beta Carotene Benefits and Risks Beta carotene, on the other hand, is one of many carotenoids in the diet that act as antioxidants in the body. For this reason, it is best to get both active or preformed vitamin A as retinol and beta carotene in the diet to ensure the best odds of getting enough vitamin A. Diets that have a lot of beta carotene may reduce the risk of getting cancer, such as stomach, and lung cancer, prostate, breast, head, and neck cancers. Cancer progression is also reduced in people who eat at least five servings of beta-carotene-rich foods like green, orange, red, and yellow fruits and vegetables. Most likely, the combination of beta-carotene and other antioxidants found in these same fruits and vegetables decrease cancer risks, not just the beta-carotene in them. It is important to note that high beta-carotene intake from beta-carotene supplements may increase the risk of lung cancer among people who smoke tobacco. Other carotenoids such as astaxanthin, lycopene, lutein, and zeaxanthin play important antioxidant roles in the body. These carotenoids maybe even more important than beta carotene for eye health. The use of lutein and and zeaxanthin may be safer alternatives for reducing the risk of age-related macular degeneration, according to the Age-Related Eye Disease Study. This is because beta carotene at high doses can have pro-oxidant effects.
What is the Recommended Daily Allowance of Vitamin A? Most foods rich in vitamin A don’t have a dietary supplement label. Determining how much vitamin A or even beta-carotene you get in your diet is challenging. To make things more difficult, the vitamin A content of foods can dramatically vary depending on the quality of the soil that the foods come from. However, you may still be interested in the recommended daily allowance for vitamin A. The Institute of Medicine set the RDA of vitamin A for people over age 19 at 900 mcg per day for men, 700 mcg per day for women, 770 mcg per day for pregnant women, and 1300 mcg per day for breastfeeding women. It is important to understand that the RDA is established to prevent vitamin A toxicity but may not have enough vitamin A for optimal health. As reviewed above, the RDA may also be insufficient for special health considerations.
Vitamin A in Foods Active vitamin A, such as retinol, is naturally present in animal sources and is fully bioavailable for absorption compared to beta-carotene, which is not. These animal sources’ RAE (retinol activity equivalent) is usually 100%, meaning they are fully bioavailable. Foods particularly high in retinol as vitamin A include: Food mg of vitamin A and RAE Beef Liver 6570 mcg RAE 6570 mcg Lamb Liver 6610 mcg RAE 6610 mcg Liver sausage 6900 mcg RAE 6900 mcg Cod Liver Oil 1350 mcg RAE 1350 mcg Bluefin Tuna 643 mcg RAE 643 mcg Eggs (3) 309 mcg RAE 309 mcg The vitamin A content of selected foods in 3-ounce portions unless otherwise indicated. It is no surprise to anyone reading this that our diets have changed dramatically in the last century, which has shifted nutrient intake patterns, including vitamin A. As you can see, the list of vitamin A-rich foods isn’t a list of commonly eaten foods. While eggs are the exception to the rule, their vitamin A content varies greatly depending on how the chickens are raised and what they are fed. Because of this, taking a grass-fed beef liver supplement or cod liver oil supplement can be helpful to get adequate vitamin A in the diet. You can also supplement your diet with organ meats, including kidney organ meats. However, if you have a condition known as iron overload, you should avoid eating organ meats.
Beta Carotene in Foods While there is a recommended daily intake of vitamin A, there is no recommended intake of beta carotene. However, eating beta carotene amounts between 3 to 6 mg of beta carotene per day may lower your chances of getting a chronic disease. A cup of the following vegetables will provide enough beta-carotene to keep you healthier. The RAE is the retinol activity equivalent. You will notice that the RAE is usually about 10% of the total beta carotene content, which means that it is not readily absorbable or bioavailable as vitamin A. Food Beta-Carotene in mg and RAE: Foodmg of beta carotene and RAE Sweet potatoes, cooked 1 cup 30 mg RAE 1.1 mg Carrot juice, 1 cup 21 mg RAE 2.2 mg Pumpkin, 1 cup cooked 17 mg RAE 0.5 mg Carrots, 1 cup cooked 11 mg RAE 1.2 mg Collard greens, cooked 1 cup 11 mg RAE 1.2 mg Kale, cooked 1 cup 11 mg RAE 1.2 mg Spinach, cooked 1 cup 11 mg RAE 1.2 mg Raw carrots, 1 cup 10 mg RAE 0.4 mg Winter squash, 1 cup cooked 7 mg RAE 0.3 mg Cantaloupe, 1 cup 4 mg RAE 0.2 mg Apricots 3 mg RAE 0.1 mg Romaine lettuce, 1 cup raw 3 mg RAE 0.1 mg Side Effects of Vitamin A As with anything, too much vitamin A may negatively affect your health. Vitamin A toxicity symptoms include liver damage, nausea, vomiting, headaches, dizziness, hair loss, and vision changes in adults, according to the Merck Manual. If you are pregnant, you should avoid large doses of vitamin A because it has been linked to birth defects. However, excess vitamin A is rare unless you take a dietary supplement with high doses of vitamin A daily. According to the Institute of Medicine, the Tolerable Upper Limit of Vitamin A is 3,000 mcg daily. Yet some research shows that dietary vitamin A supplements at doses of up to 25,000 IU per day is safe. Higher vitamin A doses may help reduce skin cancer risk, but more research is needed. Eating vitamin A-rich foods is unlikely to ever result in excess vitamin A. Experts in vitamin A research recommend adequate vitamin D to help avoid any risk of vitamin A toxicity. If you are a smoker, you should avoid taking beta-carotene supplements.
Types of Vitamin A Supplements Vitamin A supplements are available, but you should know that most vitamin A on the market is synthetic. For this reason, the best way to get extra vitamin A in supplemental form is by taking desiccated liver capsules. Another good option is to find a high-quality cod liver oil. Beta carotene supplements are not recommended because of the inefficient conversion into active vitamin A and because there is an increased cancer risk in susceptible individuals like smokers. It is best to get beta carotene through darkly pigmented vegetables and fruits. Which is better for eye health: vitamin A or beta-carotene? The research isn’t “clear” about which is better for eye health. Because of this, it is likely best to get both in your diet. Is it okay to take vitamin A supplements every day? This depends on your baseline diet. However, most people don’t eat vitamin A-rich foods, so it is likely safe for most people to get a moderate vitamin A dose in supplements. You should always check with your healthcare provider to determine if vitamin A is right for you.
What is the richest source of vitamin A? Beef liver. Are vitamin A and beta carotene the same thing? No. Vitamin A is an essential nutrient, while beta carotene can become vitamin A, but it requires multiple steps in the body. Is beta carotene toxic? Not usually, although some research indicates that it can be a pro-oxidant at high doses. Can you take beta carotene and vitamin A together? Yes, both naturally occur in the diet, so taking both together in a supplement form can be safe if you follow safe dosing guidelines as reviewed above. However, if you are a smoker, you should avoid taking supplemental beta carotene.
Do carrots contain vitamin A or beta-carotene? Carrots contain beta-carotene. They do not have active vitamin A. Is vitamin A safe during pregnancy? Vitamin A is an essential nutrient for a pregnant mom and her baby. But, there is a risk of taking extra vitamin A due to teratogenicity. For this reason, it is best to eat vitamin A-rich foods instead of supplemental amounts above the dose you get in a prenatal vitamin.
Which is better, vitamin A or beta-carotene? While both may have important bodily roles, vitamin A is an essential nutrient, while beta-carotene is not. Read more: https://thehealthyrd.com/how-vitamin-a-will-save-the-day/
About Post Author
