The easiest way to get vitamin A is through food, and most people can hit their daily target without supplements. Adult men need 900 mcg RAE per day, adult women need 700 mcg RAE, and pregnant women need 770 mcg RAE. You can reach those numbers through animal foods that contain ready-to-use vitamin A, plant foods rich in pigments your body converts into vitamin A, or a combination of both.
Two Forms of Vitamin A in Food
Vitamin A comes in two basic forms depending on whether it’s from an animal or a plant. Animal foods contain preformed vitamin A (retinol), which your body can use immediately. Plant foods contain provitamin A carotenoids, mostly beta-carotene, which your body converts into retinol after digestion. Both count toward your daily intake, but the conversion from plant sources is less efficient, so you need to eat more of them to get the same amount.
Nutritional labels and databases measure vitamin A in micrograms of “retinol activity equivalents” (mcg RAE), which accounts for this conversion difference. When you see RAE values for sweet potatoes or carrots, the math is already done for you.
Best Animal Sources
Organ meats are by far the most concentrated source. A 3-ounce serving of pan-fried beef liver delivers 6,582 mcg RAE, which is more than seven times the daily requirement for men. You don’t need to eat liver often. Once a week, or even every couple of weeks, provides a substantial reserve because your body stores vitamin A in the liver and draws on it over time.
Beyond organ meats, other animal sources contribute meaningful but more moderate amounts:
- Pickled Atlantic herring: 219 mcg RAE per 3 ounces
- French vanilla ice cream (soft serve): 185 mcg RAE per ⅔ cup
- Skim milk (fortified): 149 mcg RAE per cup
- Part-skim ricotta cheese: 133 mcg RAE per ½ cup
- Hard-boiled egg: 75 mcg RAE per large egg
- Sockeye salmon: 59 mcg RAE per 3 ounces
Dairy and eggs won’t single-handedly meet your needs, but they add up across the day. Two eggs at breakfast, a glass of fortified milk, and some cheese on a salad can easily contribute a third of your daily target before you touch any vegetables.
Best Plant Sources
Orange and dark green vegetables are the richest plant sources. Sweet potatoes, carrots, spinach, kale, butternut squash, and red bell peppers are all high in beta-carotene. A single medium baked sweet potato typically provides well over 100% of your daily vitamin A needs. Cantaloupe, mangoes, and dried apricots are the standout fruits.
The deep orange or dark green color is a reliable visual cue. The more intensely colored the vegetable or fruit, the more beta-carotene it generally contains. Pale vegetables like celery or iceberg lettuce contribute very little.
Because your body regulates how much beta-carotene it converts to retinol, plant sources carry virtually no risk of vitamin A toxicity. If you eat more beta-carotene than your body needs, it simply converts less. The worst that happens with very high beta-carotene intake is a harmless orange tint to the skin, which fades once you cut back.
How to Absorb More From Your Meals
Vitamin A is fat-soluble, meaning it dissolves in fat and absorbs poorly without it. Diets critically low in fat (under about 5 to 10 grams per day) significantly impair absorption of both retinol and carotenoids. For most people eating a typical diet, this isn’t a concern. But if you’re eating a very low-fat meal, like plain steamed carrots or a fat-free salad, you’ll absorb much less of the beta-carotene than if you added even a small amount of oil, butter, nuts, or avocado.
Cooking also helps. Heat breaks down cell walls in vegetables, releasing more beta-carotene for your body to absorb. Lightly sautéing spinach or roasting sweet potatoes in a little olive oil is one of the most efficient ways to maximize what you get from plant sources. Raw carrots still provide vitamin A, just less of it per bite compared to cooked ones.
When Supplements Make Sense
Most people eating a varied diet that includes some combination of vegetables, dairy, eggs, or fish get enough vitamin A without trying. Supplements are most useful for people with specific absorption issues, such as conditions affecting the pancreas, liver, or intestines that cause poor fat digestion. People on extremely restrictive diets may also fall short.
Standard multivitamins typically contain vitamin A as either preformed retinol or beta-carotene, or a mix of both. The beta-carotene form is safer in terms of toxicity risk because your body self-regulates the conversion. If your supplement contains preformed retinol, pay attention to the dose relative to the tolerable upper intake level of 3,000 mcg RAE per day for adults. Exceeding that level regularly can cause liver damage, headaches, nausea, and in pregnant women, birth defects.
Signs You’re Not Getting Enough
Difficulty seeing in dim light is one of the earliest signs of vitamin A deficiency. This night blindness can be subtle at first, showing up as slow adjustment when you walk into a dark room or increased trouble driving at night. Dry eyes, frequent skin infections, and slow wound healing can also develop as the deficiency worsens.
Severe deficiency is rare in developed countries but common in parts of the world where diets lack both animal foods and orange or green vegetables. Blood tests can confirm deficiency: a serum retinol level below 0.70 µmol/L indicates subclinical deficiency, and below 0.35 µmol/L is considered severe.
Avoiding Too Much
Vitamin A toxicity comes almost exclusively from preformed retinol, either from supplements or from eating organ meats in extreme quantities. The tolerable upper limit for adults is 3,000 mcg RAE per day. A single serving of beef liver exceeds that, but occasional liver consumption is safe because your body can handle periodic spikes. The concern is chronic daily intake above the limit over weeks or months.
Symptoms of excess include nausea, dizziness, blurred vision, joint pain, and in chronic cases, liver damage. Pregnant women need to be especially careful, as high preformed vitamin A intake during the first trimester is linked to birth defects. Beta-carotene from plant foods does not carry this risk.
A practical approach: get most of your vitamin A from a mix of colorful vegetables, dairy, eggs, and occasional fish. If you eat liver, treat it as an occasional food rather than a daily one. And if you take a supplement, check that it doesn’t push your total preformed retinol intake above the upper limit when combined with your diet.