Okay, so you might be the outlier and pack kale for lunch and reach for a banana post-workout—teach us your ways—but are you 100 percent sure you're getting enough nutrients? We tapped registered dietitians Emily Haller and Keri Gans to help identify the signs that your body might need more vitamins. Blurred vision, for example? You might need to eat more carrots—not be prescribed glasses.

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Hellin Kay
  • Dry eyes
  • Blindness at night
  • Scaling, dry skin
  • Diarrhea

The next time you get a paper cut, grab a bandage and chew on some carrots, sweet potatoes, squash, or tuna. Vitamin A encourages healthy cell production to heal wounds, boost your immune system, and strengthen your vision. Aim for roughly 2,333 IU a day.

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Hellin Kay
  • Depression
  • Gingivitis
  • Impaired wound healing
  • Prone to bruising
  • Nosebleeds
  • Bleeding gums
  • High blood pressure

An orange a day—not really, but 85 mg daily will do—keeps everything that we just listed above away. This antioxidant protects against don't-want-ever illnesses such as heart disease, cancer, asthma, and the common cold.

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Hellin Kay
  • Softened bones (over an extended period of time)
  • Susceptibility to infectious diseases like the flu

There are no clear symptoms of vitamin D deficiency, however, the longer someone goes without getting the nutrient—by not basking in the sunlight enough or eating enough almonds or fatty fish—the more likely it is your skeletal health decreases. The only way to be positive of your status is to get yourself checked. The daily recommendation is 600 IU.

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Hellin Kay
  • Fatigue
  • Frequent muscle cramps
  • Prolonged abnormal appetite—meaning eating isn't appealing to you (WHAT??)
  • Development of osteoporosis (over a longer period of time)

You remember those Got Milk commercials? Brilliant. But there's a slight chance their message didn't stick when you were a kid. Calcium helps your heart, prevents bloods clots, and of course, fortifies your bones and teeth. Adults should aim for about 1,000 mg per day from sources like milk, yogurt, cheeses, almonds, and salmon.

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Hellin Kay
  • Hair that falls out
  • Thinning hair
  • Sore muscles
  • Not building muscle while exercising 
  • Constantly getting sick
  • Muscle loss

Is it just us or is everyone talking about protein these days? Although standard recommendations for women say to consume about 46 g per day, fitness experts usually suggest eating 1 g of protein per pound if you're trying to gain muscle mass—so 130 g of protein for a 130-pound woman. Don't go overboard with your red meats though: The quality and quantity of protein sources can impact your risk of cardiovascular disease and diabetes.

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  • Constipation
  • Constant hunger

A healthy fiber intake—20 to 35 g every day from oats, beans, and broccoli—can help with irritable bowel syndrome, and high cholesterol. 

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Hellin Kay
  • Pale skin
  • Always feeling cold
  • Dizziness
  • Headaches
  • Difficulty breathing

Iron allows our cells to retain oxygen and keep our blood circulating. When you don't hit the recommended 18 mg a day, anemia becomes a risk. Spinach, fish, nuts and seeds all act as preventatives.

From: Marie Claire US