Complete Vitamin and Mineral Deficiency Guide

What It Does

Vitamin D helps your body absorb calcium, supports bone health, immune function, and mood regulation. It's often called the "sunshine vitamin" because your skin produces it when exposed to sunlight. Works synergistically with magnesium for optimal bone health.

Deficiency Symptoms

• Fatigue and tiredness
• Bone pain and muscle weakness
• Frequent infections
• Depression or mood changes
• Impaired wound healing

Food Sources

Fatty fish (salmon, mackerel, sardines), fortified milk and cereals, egg yolks, mushrooms exposed to UV light.

Recommended Daily Intake

Adults: 600-800 IU (15-20 mcg) | Seniors (70+): 800 IU (20 mcg)

Recognize these symptoms? Take the free vitamin D deficiency test →

What It Does

Essential for red blood cell formation, DNA synthesis, and neurological function. Critical for energy production and brain health.

Deficiency Symptoms

• Extreme fatigue and weakness
• Tingling in hands and feet (neuropathy)
• Memory problems and confusion
• Pale or jaundiced skin
• Shortness of breath and dizziness

Food Sources

Meat, fish, poultry, eggs, dairy products, fortified cereals and nutritional yeast (for vegans).

Recommended Daily Intake

Adults: 2.4 mcg | Pregnant women: 2.6 mcg | Breastfeeding: 2.8 mcg

In one of the risk groups? Take the free B12 deficiency quiz →

What It Does

Iron is crucial for making hemoglobin, the protein in red blood cells that carries oxygen throughout your body. It also supports immune function and cognitive development.

Deficiency Symptoms (Anemia)

• Extreme fatigue and weakness
• Pale skin, nails, and gums
• Shortness of breath
• Cold hands and feet
• Brittle nails and hair loss
• Unusual cravings (ice, dirt - called pica)

Food Sources

Heme Iron (better absorbed): Red meat, poultry, fish
Non-Heme Iron: Lentils, beans, spinach, fortified cereals, tofu

Tip: Pair non-heme iron with Vitamin C (citrus, tomatoes) to boost absorption. Avoid taking with calcium supplements as they can interfere with absorption.

Recommended Daily Intake

Men: 8 mg | Women (19-50): 18 mg | Pregnant women: 27 mg

Fatigue, pale skin, ice cravings? Take the free iron deficiency test →

What It Does

Involved in over 300 biochemical reactions. Supports muscle and nerve function, blood sugar control, blood pressure regulation, and bone health. Works with Vitamin D and calcium for optimal bone health.

Deficiency Symptoms

• Muscle cramps and spasms
• Fatigue and weakness
• Irregular heartbeat
• Numbness and tingling
• Anxiety and irritability
• Migraines

Food Sources

Dark leafy greens (spinach, kale), nuts and seeds (almonds, pumpkin seeds), whole grains, legumes, dark chocolate, avocados.

Recommended Daily Intake

Men: 400-420 mg | Women: 310-320 mg

Cramps, twitches, poor sleep? Take the free magnesium deficiency test →

What It Does

Essential for building and maintaining strong bones and teeth. Also critical for muscle function, nerve transmission, and blood clotting. Requires Vitamin D for proper absorption.

Deficiency Symptoms

• Weak, brittle bones (osteoporosis)
• Muscle cramps and spasms
• Numbness in fingers and toes
• Abnormal heart rhythms
• Dental problems

Food Sources

Dairy products (milk, yogurt, cheese), fortified plant milks, sardines with bones, tofu, kale, broccoli.

Recommended Daily Intake

Adults (19-50): 1,000 mg | Women (51+) & Men (71+): 1,200 mg

Cramps, numbness, dental problems? Take the free calcium deficiency test →

What It Does

Supports immune function, wound healing, DNA synthesis, and cell division. Important for taste and smell.

Deficiency Symptoms

• Weakened immune system (frequent infections)
• Hair loss
• Loss of appetite and taste
• Slow wound healing
• Skin rashes

Food Sources

Oysters, red meat, poultry, beans, nuts, whole grains, fortified cereals.

Recommended Daily Intake

Men: 11 mg | Women: 8 mg | Pregnant women: 11 mg

Hair loss, frequent colds, dulled taste? Take the free zinc deficiency test →

What It Does

Powerful antioxidant that supports immune function, collagen production (skin, tendons, ligaments), and helps absorb iron from plant-based foods. Enhances immune function when combined with zinc.

Deficiency Symptoms

• Frequent bruising
• Slow wound healing
• Bleeding gums and loose teeth
• Dry, rough skin
• Fatigue and weakness
• Scurvy (severe deficiency)

Food Sources

Citrus fruits (oranges, lemons), strawberries, bell peppers, broccoli, Brussels sprouts, tomatoes, kiwi.

Recommended Daily Intake

Men: 90 mg | Women: 75 mg | Smokers: +35 mg

Bruising, bleeding gums, slow healing? Take the free vitamin C deficiency test →

What It Does

Essential fats crucial for brain health, heart health, and reducing inflammation. The three main types are ALA, EPA, and DHA.

Deficiency Symptoms

• Dry, flaky skin
• Brittle hair and nails
• Fatigue and poor concentration
• Joint pain and stiffness
• Depression and mood swings

Food Sources

EPA & DHA: Fatty fish (salmon, mackerel, sardines, anchovies)
ALA: Flaxseeds, chia seeds, walnuts, hemp seeds

Recommended Daily Intake

Combined EPA & DHA: 250-500 mg | ALA (Men): 1.6 g | ALA (Women): 1.1 g

Dry skin, brain fog, stiff joints? Take the free omega-3 deficiency test →

What It Does

Supports vision (especially in low light), immune function, and cell growth. Comes in two forms: preformed vitamin A (retinol) from animal foods, and beta-carotene from plants, which the body converts as needed.

Deficiency Symptoms

• Night blindness (trouble seeing in low light)
• Dry eyes and dry, rough skin
• Frequent respiratory or other infections

Food Sources

Liver, fish, eggs, dairy (preformed); carrots, sweet potatoes, spinach, kale (beta-carotene).

Recommended Daily Intake

Men: 900 mcg RAE | Women: 700 mcg RAE

Night vision trouble, dry eyes? Take the free vitamin A deficiency test →

What It Does

A fat-soluble antioxidant that protects cell membranes, including nerve cells, from oxidative damage. True dietary deficiency is rare and almost always linked to a fat-malabsorption condition rather than diet alone.

Deficiency Symptoms

• Muscle weakness
• Loss of coordination and balance
• Vision problems
• Numbness or tingling

Food Sources

Sunflower seeds, almonds, wheat germ oil, spinach.

Recommended Daily Intake

Adults: 15 mg

Muscle weakness, coordination problems? Take the free vitamin E deficiency test →

What It Does

Essential for normal blood clotting and plays a supporting role in bone health. Newborns receive a preventive vitamin K injection at birth because reserves and gut bacteria aren't yet established.

Deficiency Symptoms

• Easy bruising
• Slow-stopping bleeding from cuts
• Heavy menstrual periods
• Blood in urine or stool

Food Sources

Kale, spinach, collard greens, broccoli, Brussels sprouts.

Recommended Daily Intake

Men: 120 mcg (AI) | Women: 90 mcg (AI)

Easy bruising, slow-stopping bleeding? Take the free vitamin K deficiency test →

What It Does

Essential for making new cells, especially red blood cells. Critical in early pregnancy to prevent neural tube defects, which is why folic acid is recommended for anyone who could become pregnant, not just those already pregnant.

Deficiency Symptoms

• Fatigue and weakness
• Mouth sores or a sore, swollen tongue
• Pale skin
• Irritability

Food Sources

Leafy greens, legumes, asparagus, avocado, fortified grains and cereals.

Recommended Daily Intake

Adults: 400 mcg | Pregnant women: 600 mcg

Fatigue, mouth sores, pale skin? Take the free folate deficiency test →