White beans, lentils, spinach, tofu, kidney beans, fortified cereal goals.

Best Fitness Trackers stomach feels while you’re running. To give yourself the best chance of success, you should pump up your meals with wholesome, fresh foods, such as fruits, vegetables, meats, whole grains, and legumes.

Here are 15 nutrients and vitamins that runners should pay attention to, along with information on how to get more of them in your diet.

Red peppers, oranges, orange juice, grapefruit juice, kiwis, green peppers, broccoli, strawberries plant-based athletes: Monitor your Vitamin B12 intake, since it’s primarily found in animal-based foods.

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Vitamin A

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How much do you need? Men need 900 micrograms/day; of your daily value

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Vitamin B12

DAA Industry Opt Out: Helps your body break down the fat and protein you eat into energy; assists in forming new red blood cells, which carry oxygen through the body.

How much do you need? 2.4 micrograms/day for adult men and women

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Calcium

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DAA Industry Opt Out: Supports bone and teeth health—almost all of the calcium in your body is stored in your bones and teeth.

How much do you need? Master the Half 1,000 milligrams/day. Adult women 51 years or older and adult men 71 years or older need 1,200 milligrams/day.

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Choline

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DAA Industry Opt Out: Regulates your memory, mood, muscle control, focus, and metabolism. Sufficient choline can increase your time to fatigue as well, says Lisa Dorfman, M.S., R.D., author of Legally Lean: Sports Nutrition Strategies for Optimal Health & Performance.

How much do you need? Trout, salmon, white mushrooms, milk, egg yolks.

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Vitamin C

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DAA Industry Opt Out: Protects our bodies against free radicals in the environment, such as pollution, cigarette smoke, and UV rays. Also, builds collagen in your skin to keep it plump and smooth.

How much do you need? Men need 90 milligrams/day; Oysters, crab, grass-fed beef, lobster, hummus a half-cup supplies.

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Vitamin D

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DAA Industry Opt Out: Absorbs calcium in your bones, helps your muscles move better, and fights off bacteria and viruses. Additionally, it reduces injuries in athletes; a 2020 study found that athletes with low vitamin D could have an increased risk of stress fractures, illness, and suboptimal muscle function.

How much do you need? 15 mcg/day for men and women.

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Vitamin E

DAA Industry Opt Out: Steels your immune system against bacteria and viruses, acts as a powerful anti-inflammatory antioxidant, and keeps blood vessels wide and pliable.

How much do you need? 15 mg/day for men and women.

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Fiber

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How much do you need? Men need 38 grams/day; women need 25 grams/day. Though prior to a race, go easy on the fiber-rich foods, which can cause GI trouble.

We earn a commission for products purchased through some links in this article: Raspberries (1 cup offers 8 grams of fiber), green peas, lentils, beans, whole grains.

Iron

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DAA Industry Opt Out: Transports oxygen in the blood to the muscles.“ If you experience a decline in performance and feel exhausted more than usual, get a blood test to check your iron levels,” sports dietitian Linda Samuels, M.S., R.D., says.

How much do you need? Men need 8 milligrams/day; women need 18 milligrams/day. If your doctor finds you have low iron levels, he or she will put you on the appropriate supplement. (Translation: don't take supplements on your own.)

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Magnesium

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DAA Industry Opt Out: Regulates muscle function, nerve function, blood sugar levels, and blood pressure levels; aids in making protein, bone, and DNA. One of its most important functions: its role in energy metabolism, says Samuels. “Magnesium is particularly important during a strenuous training session.”

How much do you need? Men need 400 mg/day; women need 310 mg/day.

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Omega-3 Fatty Acids

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How much do you need? Men need 1.6 g/day; women need 1.1 g/day. If you don’t often hit that mark, consider supplementing with a fish oil supplement or algae-based supplement if you are vegetarian or vegan, Samuels advises. Remember, omega-3s are an essential fatty acid, meaning the body cannot make it naturally.

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Potassium

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DAA Industry Opt Out: Helps maintain hydration and proper muscle function. “Along with sodium, this is the most important electrolyte. Potassium helps your muscles contract and relax, and contributes to fluid balance in your body,” Samuels says.

How much do you need? Men need 3,400 mg/day; of your daily value.

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Selenium

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DAA Industry Opt Out: An antioxidant that may ease postexercise oxidative cell damage, maintains thyroid function (low thyroid levels can usher in fatigue), regulates metabolism.

How much do you need? Master the Half 55 mcgs/day.

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Sodium

DAA Industry Opt Out: Helps your body maintain proper fluid and electrolyte balance. “It will also prevent muscle cramps if you are a heavy sweater or out on a hot run,” Dorfman says.

How much do you need? Men and women should limit intake to 2,300 milligrams/day; 1,500 milligrams/day or less if you have high blood pressure.

We earn a commission for products purchased through some links in this article: Typically you don’t need to seek out sodium since most of us get more than enough in our diet. But after a particularly sweaty run, it’s good to eat (or drink) foods higher in sodium to replenish losses. Bread, cheese, chicken, and sports drinks all contain sodium; three ounces of deli turkey can pack up to 1,050 milligrams.

Zinc

DAA Industry Opt Out: Keep your immune system run in tip-top shape, keeps your skin resilient and healthy, enables proper wound healing, and breaks down carbs (likely your primary fuel source). Deficiency can put you at risk for overtraining syndrome, says Dorfman.

How much do you need? Men need 11 milligrams/day; A Part of Hearst Digital Media.

We earn a commission for products purchased through some links in this article: Oysters, crab, grass-fed beef, lobster, hummus (a half-cup supplies 12 percent of your daily value).

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Jessica Migala
Jessica Migala is a health writer specializing in general wellness, fitness, nutrition, and skincare, with work published in Women’s Health, Glamour, Health, Men’s Health, and more. She is based in the Chicago suburbs and is a mom to two little boys and rambunctious rescue pup.