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7 Nutrients even healthy women miss

Maryann Tomovich Jacobsen, MS, RD is one of our SheKnows Experts. She's a registered dietitian, mom of two and freelance writer with more than 16 years of experience in the nutrition field. She is the founding editor of "Raise Healthy Ea...

Think your diet is healthy? These important nutrients still may be missing from your diet.

woman eating healty

Photo credit: Dylan Ellis/Digital Vision/Getty Images

Whether it's for future pregnancies, the strength of bones or muscles, or for a healthy digestive or immune system, here are seven nutrients that should be on the radar of every health-conscious woman on the planet.

Iron

According to the Centers of Disease Control, nearly one out of 10 women between 20 and 49 are deficient in iron. That number jumps to four out of 10 for pregnant women. Not only do iron needs increase during pregnancy to support growth of the fetus (18 to 27 milligrams per day), without sufficient iron a woman's body may have trouble making enough red blood cells to make the additional blood it needs.

Food sources of iron include beef (3.4 milligrams per serving), turkey, dark meat (2.0 milligrams), ground meat (2.2 milligrams) tuna (1.2 milligrams), chicken (1.1 milligrams), iron-fortified cereals (18 milligrams), soybeans (8.8 milligrams), lentils (6.6 milligrams), beans (3.6 to 5.2 milligrams), and spinach (3.2 milligrams). Animal sources are better absorbed than plant sources of iron, but adding vitamin C-rich foods (citrus fruits, broccoli and tomatoes) will increase their absorption.

Vitamin D

According to a report from the Institute of Medicine (IOM), vitamin D from food alone results in less than half the recommended vitamin D. Of course, the sun is also a source, but not a very reliable one. Low vitamin D has been linked to many diseases including osteoporosis, certain cancers, diabetes, complications during pregnancy such as gestational diabetes and preeclampsia, as well as multiple sclerosis and heart disease. For women younger than 70, the recommended amount is 600 international units (IU) but higher levels may be needed to bring low levels up.

Food sources of vitamin D include swordfish (566 IU), salmon (447 IU), tuna (154 IU), fortified orange juice (137 IU), milk (115 to 124 IU), eggs (41 IU) and fortified cereals at 10 percent daily value (40 IU). At your yearly physical, make sure to find out what your blood levels are to determine if supplementation is needed. The IOM recommends at least 20 nanograms per milliliter (ng/ml) while the Endocrine Society recommends 30 ng/ml.

Calcium

According to the National Dairy Council, nine out of 10 women don't get the recommended amount of calcium needed for optimal bone health. Recommended amounts for women aged 20 to 49 is 1000 milligrams per day and this jumps to 1300 milligrams at age 50. That's because bone loss rapidly declines at menopause and a few years after.

Food sources include yogurt (313 to 415 milligrams per serving), cheese (307 to 333 milligrams), milk (276 to 293 milligrams), soy milk or other nondairy fortified beverages (299 milligrams), fortified orange juice (261 milligrams), firm tofu made with calcium sulfate (253 milligrams), canned salmon (181 milligrams), kale (100 milligrams) and bok choy (71 milligrams).

Probiotics and prebiotics

Modern diets, overuse of antibiotics and aging can change the type of bacteria that resides in the gastrointestinal (GI) tract, negatively affecting health. According to USProbiotics.org, probiotics (good bacteria) can improve digestion, help ease the side effects of antibiotics and bolster the immune system. Prebiotics act as fuel for good bacteria in the GI tract, increasing their presence.

Fermented foods like yogurt, kefir, miso and vegetables like kimchi and sauerkraut contain probiotics. For some people, probiotic supplements can be helpful. Prebiotic food sources include asparagus, artichokes, bananas, whole grains, onions and garlic.

Fiber

According to the 2010 Dietary Guidelines for Americans, most people only get about half the recommended fiber (15 grams) which is 25 grams a day for women. Fiber helps fill us up, aids digestion, and reduces the risk of developing heart disease and Type 2 diabetes. To ensure you get enough, fill your diet with plant-based fruits, vegetables, beans and legumes and whole grains like oatmeal, brown rice, quinoa and whole wheat.

Omega-3 fatty acids

Most Americans get only 100 milligrams per day of omega-3 fatty acids DHA and EPA combined, compared to the recommended amount of 500 milligrams (from international groups; the U.S. lags behind making recommendations). These fats play an important role in pregnancy from brain development of the fetus to decreasing the risk of preterm delivery and postpartum depression. They also help maintain a healthy cardiovascular system, reduce the risk of certain cancers and diabetes and may help stave off dementia.

The American Heart Association recommends two servings of fish per week to ensure adequate intake. Food sources of DHA include salmon (1238 milligrams per serving), tuna packed in oil (535 milligrams), sardines (433 milligrams), fortified eggs (50 to 300 milligrams), and fortified milk (32 milligrams).

Protein

Women begin losing lean body mass in their thirties, slowing metabolism and increasing risk of weight gain. In addition to regular exercise, research shows spreading protein intake out throughout the day (about 25 grams per meal), instead of consuming high amounts at one meal, helps build lean body mass in adults.

Food sources include lean meats (three ounces equals 21 grams of protein), 1 cup of milk (8 grams), 1 cup of yogurt (11 grams), 1 cup of Greek yogurt (18 grams), 1 cup of dry beans (16 grams) and 1 hard-boiled egg (6 grams).

Keeping an eye on these seven nutrients will help you stay healthy and strong, no matter what your age.

Read more from Maryann Jacobsen here.

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