Nutrition Guides by Nutrient
Evidence-based guides to the best whole food sources for every essential nutrient. Each guide includes ranked food lists, meal ideas, absorption science, and clinical references.
All Nutrient Guides
Foods High in Magnesium
Magnesium supports over 300 enzymatic reactions in the body — from muscle contraction to nerve signaling and sleep. Most…
Foods High in Iron
Iron is essential for making hemoglobin, the protein in red blood cells that carries oxygen to every tissue in your body…
Foods High in Omega-3
Omega-3 fatty acids are essential fats your body cannot produce on its own — you must get them from food. They come in t…
Foods High in Vitamin C
Vitamin C is a potent water-soluble antioxidant essential for collagen synthesis, immune defense, and iron absorption. T…
Foods High in Calcium
Calcium is the most abundant mineral in the body — 99% of it stored in bones and teeth. Adults need 1,000–1,300 mg/day t…
Foods High in Zinc
Zinc is involved in over 300 enzymatic processes and is especially critical for immune function, wound healing, and DNA …
Foods High in Folate
Folate (vitamin B9) is critical for DNA synthesis, cell division, and amino acid metabolism. It's especially important d…
Foods High in Vitamin B12
Vitamin B12 (cobalamin) is essential for nerve function, red blood cell formation, and DNA synthesis. Adults need just 2…
Foods High in Vitamin D
Vitamin D is unique: it functions as both a vitamin and a hormone, influencing over 1,000 genes. Adults need 20 mcg (800…
Foods High in Choline
Choline is an essential nutrient most people have never heard of — yet 90% of Americans don't get enough. It's critical …
Foods High in Fiber
Dietary fiber feeds your gut microbiome, lowers cholesterol, stabilizes blood sugar, and keeps you full longer. Adults n…
Foods High in Potassium
Potassium is the third most abundant mineral in the body, regulating blood pressure, fluid balance, and muscle contracti…
Foods High in Vitamin A
Vitamin A is a fat-soluble vitamin essential for vision, immune function, and skin health. The FDA recommends 900 mcg RA…
Foods High in Vitamin K
Vitamin K is a fat-soluble vitamin essential for blood clotting and bone mineralization. It exists in two main forms: K1…
Foods High in Selenium
Selenium is a trace mineral that functions as an essential component of selenoproteins — enzymes that protect against ox…
Foods High in Iodine
Iodine is a trace mineral with a single but indispensable role: enabling the thyroid gland to produce thyroid hormones (…
Foods High in Vitamin E
Vitamin E is a family of eight fat-soluble compounds — four tocopherols and four tocotrienols — with alpha-tocopherol be…
Foods High in Manganese
Manganese is a trace mineral that serves as a cofactor for over a dozen enzymes involved in bone formation, glucose meta…
Foods High in Phosphorus
Phosphorus is the second most abundant mineral in your body, working alongside calcium to build strong bones and teeth. …
Foods High in Copper
Copper is an essential trace mineral that acts as a cofactor for critical enzymes throughout your body. It's vital for i…
Foods High in Thiamin
Thiamin (vitamin B1) is the first B vitamin ever discovered and plays a critical role in converting carbohydrates into c…
Foods High in Riboflavin
Riboflavin (vitamin B2) is essential for energy production, cellular function, and the metabolism of fats and drugs. It …
Foods High in Niacin
Niacin (vitamin B3) is involved in over 400 enzymatic reactions — more than any other vitamin-derived coenzyme. It's ess…
Foods High in Pantothenic Acid
Pantothenic acid (vitamin B5) gets its name from the Greek word 'pantos' meaning 'everywhere' — and for good reason. It'…
Foods High in B6
Vitamin B6 (pyridoxine) is a versatile nutrient involved in over 100 enzyme reactions, primarily related to protein meta…
Foods High in Protein
Protein is the body's primary building material — essential for muscle growth, immune function, hormone production, and …
Foods High in Sodium
Sodium is an essential electrolyte that regulates fluid balance, nerve signaling, and muscle contraction. The FDA daily …
Foods High in Beta Carotene
Beta-carotene is the most important provitamin A carotenoid — your body converts it to active vitamin A (retinol) as nee…
Foods High in Lycopene
Lycopene is the red pigment that gives tomatoes, watermelon, and pink grapefruit their color — and it's one of the most …
Foods High in Lutein Zeaxanthin
Lutein and zeaxanthin are the only carotenoids that accumulate in the macula — the center of your retina responsible for…
Foods High in Leucine
Leucine is the most anabolic of the three branched-chain amino acids (BCAAs) and the primary trigger for muscle protein …
Foods High in Isoleucine
Isoleucine is one of the three branched-chain amino acids (BCAAs), working alongside leucine and valine in muscle metabo…
Foods High in Valine
Valine is the third branched-chain amino acid, working alongside leucine and isoleucine in muscle metabolism and energy …
Foods High in Tryptophan
Tryptophan is an essential amino acid that your body converts into serotonin (the 'happiness' neurotransmitter) and mela…
Foods High in Lysine
Lysine is an essential amino acid that plays a central role in collagen production, calcium absorption, and immune funct…
Why Food First?
Whole foods deliver nutrients alongside fiber, antioxidants, phytochemicals, and cofactors that work synergistically — benefits no supplement can replicate. These guides help you build a plate that covers all your nutritional needs.
Try the Supplement Replacer ToolMedical Disclaimer: These guides are for informational purposes only and are not a substitute for professional medical advice. Always consult a qualified healthcare provider before making significant dietary changes.