Plants have iron, just the kind your body absorbs less easily. The government fact sheet quantifies exactly how much less, and what raises the odds in your favor.
Vegan Brief·Evidence last reviewed July 2, 2026
This is a summary of the cited evidence, not medical advice.
Iron typeNonheme (plant)
Absorption boosterVitamin C
Anemia riskNot higher in vegans
01
Two kinds of iron
Iron from plants is nonheme iron, and the body absorbs it less readily than the heme iron in meat. The NIH fact sheet, a public-domain US government document, is specific about the gap.
Primary source 01 / 03
The bioavailability of iron is approximately 14% to 18% from mixed diets that include substantial amounts of meat, seafood, and vitamin C (ascorbic acid, which enhances the bioavailability of nonheme iron) and 5% to 12% from vegetarian diets
Because absorption is lower, the recommended intake is set higher. This is the part most people have never seen stated plainly.
Primary source 02 / 03
The requirement for iron is 1.8 times higher for people who follow vegetarian diets than those for people who include animal products in their diet, such as meat.
The absorbability is not fixed. Vitamin C pushes it up. Some plant compounds push it down, which is why a well-known iron source can still underdeliver.
Primary source 03 / 03
Some plant-based foods that are good sources of iron, such as spinach, have low iron bioavailability because they contain iron-absorption inhibitors, such as polyphenols
The practical read: eat iron-rich plants (beans, lentils, tofu, fortified grains), pair them with vitamin C, and know that the number on the label is not the number you absorb. The requirement already accounts for that.
Protein on a vegan dietThe 'where do you get your protein' question has a boring, well-documented answer: from plants, across the day, and the complete-versus-incomplete framing was retired years ago.
Vitamin B12 on a vegan dietThis is the one nutrient the evidence is blunt about: plant foods are not a reliable source, so vegans need a supplement or fortified foods. Full stop.
Zinc on a vegan dietPlants have zinc; phytates make you absorb less of it. The fix is more intake plus a few kitchen tricks that free the zinc up.
Selenium on a vegan dietSelenium is the mineral your food inherits from the dirt it grew in. That makes plant levels a lottery of geography, and it is why vegan intakes can run low, and why two Brazil nuts can flip the whole thing.
Folate on a vegan dietFolate is the one B vitamin plant eaters rarely have to think about. The name comes from foliage, and the diet is built on exactly that.
Frequently asked
Do vegans need more iron than meat eaters?
According to the NIH Office of Dietary Supplements, the iron requirement is 1.8 times higher for people who follow vegetarian diets than for people who include animal products such as meat, because nonheme iron from plants is less bioavailable.
Does vitamin C help iron absorption?
Yes. The NIH fact sheet notes that vitamin C (ascorbic acid) enhances the bioavailability of nonheme iron, the form found in plant foods.
The primary sources
The documents this page quotes. Read them yourself.
