Your body needs 13 essential vitamins and at least 15 essential minerals to function properly, bringing the total to roughly 28 micronutrients you need to get from food or sunlight on a regular basis. Some sources count slightly more or fewer minerals depending on whether they include ultra-trace elements, but the core list is well established.
The 13 Essential Vitamins
Vitamins split into two groups based on how your body stores and uses them: fat-soluble and water-soluble. The distinction matters because it affects how often you need to consume them and how easily you can get too much.
The four fat-soluble vitamins are A, D, E, and K. Your body stores these in the liver, fatty tissue, and muscles, which means you don’t need to replenish them every single day. They absorb more easily when eaten alongside dietary fat, so having avocado with a salad or olive oil on roasted vegetables isn’t just tastier, it helps your body take in more of these nutrients. The flip side of storage is that fat-soluble vitamins can build up to harmful levels if you consistently take high-dose supplements.
The nine water-soluble vitamins are vitamin C and the eight B vitamins: B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6, B7 (biotin), B9 (folate), and B12. Your body doesn’t store these well, so excess amounts leave through urine. That means you need a steady supply from your diet. The one exception is B12, which the liver can store for years.
The 15 Essential Minerals
Minerals are divided into macrominerals, which you need in larger amounts, and trace minerals, which you need in much smaller quantities. The distinction is about dose, not importance. A trace mineral deficiency can be just as serious as running low on a macromineral.
The seven macrominerals are calcium, phosphorus, magnesium, sodium, potassium, chloride, and sulfur. These play structural roles (calcium in bones, for example) and help regulate fluid balance, nerve signals, and muscle contractions.
The trace minerals include iron, zinc, copper, manganese, iodine, selenium, fluoride, and cobalt. Your body needs only milligrams or even micrograms of each per day, but they’re essential for everything from oxygen transport (iron) to thyroid function (iodine) to immune defense (zinc).
What About Choline?
Choline is sometimes called the “unofficial” 14th vitamin. It’s a nutrient your body needs for liver function, brain development, and nerve signaling, and it overlaps functionally with B vitamins, particularly folate. When your folate intake is low, your choline needs go up because choline steps in as a backup for the same chemical reactions. Adults need 425 to 550 mg per day depending on sex. Eggs, liver, and soybeans are among the richest sources.
Choline doesn’t officially make the vitamin list because your body can produce small amounts of it, and there wasn’t enough data to set a formal RDA. Instead, it has an “adequate intake” recommendation, which is a best estimate rather than a precise threshold.
How Much You Actually Need
Daily requirements vary by age, sex, and life stage. Here are a few of the most commonly discussed nutrients and what adults typically need:
- Calcium: 1,000 mg per day for most adults, rising to 1,200 mg for women over 50
- Iron: 18 mg per day for premenopausal women, 8 mg for men and postmenopausal women
- Magnesium: 310 to 320 mg for women, 400 to 420 mg for men
- Vitamin C: 75 mg for women, 90 mg for men
- Vitamin D: 600 IU for most adults, increasing to 800 IU after age 70
Pregnancy shifts several of these numbers significantly. Iron needs nearly double, folate requirements jump to help prevent neural tube defects, and calcium and vitamin D demands increase to support fetal bone development.
Signs You’re Not Getting Enough
Iron deficiency is the most common nutrient shortage worldwide, and it shows up as persistent fatigue and weakness from anemia. Vitamin A deficiency, still prevalent in parts of the developing world, causes night blindness as an early warning sign. Iodine deficiency leads to thyroid enlargement (goiter) and can impair brain development in children.
In wealthier countries, the gaps tend to be subtler. Many adults fall short on magnesium, vitamin D, and potassium without obvious symptoms. Over time, though, these low-grade deficiencies contribute to weaker bones, higher blood pressure, and increased fatigue. The absence of dramatic symptoms doesn’t mean the shortfall is harmless.
Food Pairings That Boost Absorption
Getting enough of a nutrient in your diet isn’t always the same as absorbing it well. Certain food combinations make a real difference. Pairing vitamin C-rich foods with iron-rich plants is one of the best-known examples: squeezing lemon over spinach or dipping bell peppers in hummus helps your body absorb the type of iron found in plant foods, which is otherwise harder to take in than the iron from meat.
Vitamin D helps your intestines absorb calcium, which is why fortified milk and cereal make a practical combination. Fat-soluble compounds like lycopene in tomatoes absorb better when eaten with healthy fats like olive oil or avocado. Even turmeric, valued for its anti-inflammatory properties, is very poorly absorbed on its own. A compound in black pepper dramatically boosts its uptake.
When More Isn’t Better
Because fat-soluble vitamins accumulate in your body, they carry a real risk of toxicity at high doses. The tolerable upper limit for vitamin A is 3,000 micrograms per day for adults. Going above that over time can cause liver damage, headaches, and even bone loss. Vitamin D’s upper limit is 4,000 IU per day for anyone over age 9, well above the 600 IU recommendation but easy to reach if you’re stacking fortified foods with supplements.
Water-soluble vitamins are generally safer in excess because your kidneys flush out what you don’t need. But “generally safer” isn’t the same as risk-free. Very high doses of B6 from supplements, for instance, can cause nerve damage over time. The safest approach for most people is to get nutrients from a varied diet and use supplements only to fill specific, identified gaps rather than as blanket insurance.
Putting the Numbers Together
The total of 13 vitamins and 15 minerals gives you about 28 essential micronutrients. Add choline and you’re at 29. Some classification systems also count a few ultra-trace minerals like chromium and molybdenum, pushing the number into the low 30s. The exact count depends on where you draw the line between “essential” and “probably beneficial.”
What stays consistent regardless of the counting method is that no single food covers all of them. The practical takeaway is variety: different colored vegetables, a mix of protein sources, whole grains, nuts, seeds, and dairy or fortified alternatives. The more diverse your plate, the less likely any one nutrient falls through the cracks.