Vitamins are organic compounds made by plants and animals, while minerals are inorganic elements that come from soil and water. That single distinction, organic versus inorganic, drives nearly every other difference between them: how they’re structured, how your body uses them, how easily they break down, and how much you need each day.
The Core Chemical Difference
Vitamins contain carbon atoms bonded to other elements like hydrogen, oxygen, and nitrogen. Because they’re organic molecules, they can be broken apart by heat, light, and acid. Minerals are single chemical elements, things like calcium, iron, and zinc, that cannot be broken down further. They hold their structure no matter what you do to them.
This is why cooking affects the two so differently. Boiling vegetables can destroy vitamin C, vitamin B1, and vitamin D in the food, but the iron, potassium, and calcium in those same vegetables survive intact. Minerals may leach into cooking water, but they don’t degrade. Vitamins A and C are especially vulnerable to high temperatures, while minerals remain stable under virtually any kitchen condition.
Where They Come From
Your body can manufacture several vitamins on its own. Skin cells produce vitamin D when exposed to sunlight. Bacteria in your gut synthesize vitamin K and some B vitamins. Your liver can convert beta-carotene from carrots and sweet potatoes into vitamin A. These self-made supplies aren’t always sufficient, but they exist as a backup.
Minerals are a different story. Your body cannot create a single one. Every milligram of calcium in your bones, every atom of iron in your red blood cells, originally entered your body through food or water. Plants pull minerals from soil through their roots, animals accumulate them by eating those plants, and you get them by eating both. There is no internal manufacturing process for any mineral.
How Vitamins Are Classified
Your body requires 13 essential vitamins: A, C, D, E, K, and the eight B vitamins (B1, B2, B3, B5, B6, B7, B9, and B12). These split into two groups based on how they dissolve and how your body stores them.
Four vitamins, A, D, E, and K, are fat-soluble. They dissolve in fat, get absorbed alongside dietary fat in your intestines, and are stored in your liver and fatty tissue. Because your body can stockpile them, you don’t need to consume them every single day, but that storage ability also means they can accumulate to toxic levels if you take too much over time.
The remaining nine are water-soluble: vitamin C and the full set of B vitamins. These dissolve in water, travel freely through your bloodstream, and get filtered out by your kidneys when levels run high. Your body doesn’t store meaningful reserves of most water-soluble vitamins, so you need a steady daily supply from food.
How Minerals Are Classified
Minerals split into two categories based on how much your body needs each day. Macrominerals are required in amounts greater than 100 milligrams per day. This group includes calcium, phosphorus, magnesium, sodium, potassium, chloride, and sulfur. Calcium alone accounts for about two pounds of an adult’s body weight, almost all of it locked in bones and teeth.
Trace minerals (also called microminerals) are needed in amounts below 100 milligrams per day. Iron, zinc, copper, manganese, iodine, selenium, fluoride, and chromium fall into this group. The “trace” label doesn’t mean they’re optional. Iodine deficiency can cause thyroid problems, iron deficiency leads to anemia, and zinc shortfalls impair immune function and wound healing.
What They Do in Your Body
Vitamins primarily act as helpers in chemical reactions. They don’t provide energy or build structures themselves, but without them, the reactions that release energy from food, build new cells, and protect tissue from damage would stall. Vitamin B1 helps cells convert carbohydrates into usable energy. Folate and B12 are essential for forming red blood cells and producing DNA. Vitamin C supports wound healing and helps maintain healthy gums and skin. Vitamin K enables blood clotting, and without it even a small cut would bleed excessively.
Vitamins also serve as antioxidants. Vitamins C and E neutralize unstable molecules that damage cells, a process linked to aging and chronic disease. And some vitamins have highly specialized jobs: vitamin A maintains the light-sensitive tissue in the back of your eye, while vitamin D regulates how much calcium enters your bloodstream.
Minerals play a broader range of roles. Some are structural: calcium and phosphorus physically make up bone tissue, and fluoride hardens tooth enamel. Others carry out electrical work. Sodium, potassium, and chloride maintain the electrical charges that allow nerves to fire and muscles to contract (including your heart). Iron sits at the center of hemoglobin, the protein in red blood cells that ferries oxygen from your lungs to every tissue in your body. Zinc supports immune cells and helps wounds close. Magnesium participates in over 300 enzyme reactions, from protein synthesis to blood sugar regulation.
How They Interact With Each Other
Vitamins and minerals don’t work in isolation. Some of the most important nutrient relationships in your body cross the vitamin-mineral divide. Vitamin D helps move calcium from your gut into your bloodstream, which is why calcium supplements are often paired with vitamin D. Magnesium, in turn, is required for the enzymes that convert vitamin D into its active form. If your magnesium levels are low, vitamin D supplementation becomes less effective.
Vitamin C boosts the absorption of non-heme iron (the type found in plant foods like spinach and lentils) by chemically converting it into a form your intestines can take up more easily. This is why pairing iron-rich plant foods with a source of vitamin C, like citrus fruit or bell peppers, makes a real difference in how much iron you actually absorb.
Minerals also compete with each other. Calcium can lower non-heme iron absorption by up to 60% when the two are consumed together, because they use the same absorption pathways in the gut. Zinc and copper share intestinal transport proteins, so high-dose zinc supplements can gradually cause copper deficiency. Iron and zinc also compete, and magnesium and zinc interfere with each other at supplement-level doses. These conflicts rarely matter when you’re getting nutrients from food, where doses are moderate and spread across meals. They become significant when you’re taking concentrated supplements.
How Much You Need
The amounts differ dramatically. Vitamin needs are measured in micrograms or milligrams. Most adults need 600 IU (15 micrograms) of vitamin D per day, rising to 800 IU after age 70. The recommended intake for vitamin B12 is just 2.4 micrograms daily for adults, though people over 50 are advised to get it primarily from fortified foods or supplements because up to 30% of older adults have trouble absorbing B12 from natural food sources.
Mineral needs span a much wider range. You need about 1,000 milligrams of calcium per day, roughly a million times more than your B12 requirement. Iron needs sit around 8 milligrams for adult men and 18 milligrams for premenstrual women. Even trace minerals like zinc require 8 to 11 milligrams daily, quantities far larger than what’s needed for most individual vitamins.
Stability in Food and Supplements
Because vitamins are organic molecules, they degrade. Heat, light, air exposure, and acidity all take a toll. Vitamin C and B1 are among the most fragile, breaking down significantly during cooking and long-term storage. Vitamin A degrades in powdered food products exposed to warmth, and vitamin D deteriorates in liquid formulations. Temperature is the single biggest driver of vitamin loss.
Some vitamins hold up well, though. Vitamins B2, B6, E, K, niacin, and biotin show little to no degradation even under challenging storage conditions. And minerals, regardless of format, remain completely stable. You can boil, fry, freeze, or store mineral-containing foods for months, and the mineral content stays the same. The mineral might move (calcium leaching into soup broth, for instance), but it doesn’t disappear.
This stability difference has practical implications. If you’re trying to preserve the vitamin content of vegetables, shorter cooking times, steaming instead of boiling, and minimal water contact all help. For minerals, how you cook matters far less than what you eat in the first place.