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Commonly discussed for Hair and nails21
Clear filtersHair and nail thickness, shine, and condition as you perceive them.
A water-soluble B vitamin (B7) involved in the metabolism of fats, carbohydrates, and protein. Found in eggs, nuts, seeds, and salmon.
NutsFoodTree nuts provide vitamin E, magnesium, fiber, and (in walnuts) plant omega-3.
A macronutrient made of amino acids that serves as a building block for muscle, enzymes, and other tissues. Found in meat, fish, eggs, dairy, beans, and soy.
A water-soluble antioxidant vitamin needed for collagen formation. Commonly discussed with skin and general resilience.
A trace mineral involved in taste, skin, wound repair, and the body's normal defense system. Oysters, red meat, and pumpkin seeds are among the richest sources.
A small amino acid abundant in collagen. Often discussed in relation to sleep quality and skin.
Broken-down collagen protein rich in glycine and proline. Commonly discussed in relation to skin and joints; evidence varies by outcome, dose, and study design.
Methylsulfonylmethane, a sulfur-containing compound found in small amounts in some foods; sold as a supplement.
An amino acid that is a major building block of collagen, and commonly discussed alongside skin and connective tissue.
AlmondsFoodA tree nut eaten raw, roasted, or as almond butter. A dietary source of vitamin E, magnesium, and monounsaturated fat, with plant protein and fiber.
A supplement form of biotin (vitamin B7), a water-soluble B vitamin, taken as capsules or tablets.
Brazil nutsFoodA large tree nut from South America. Notable as a concentrated dietary source of selenium, with magnesium and monounsaturated fat.
Curry leafFoodAn aromatic leaf used in South Indian cooking; a source of iron, calcium, and vitamin A.
EggsFoodA whole food from hens. A dietary source of complete protein, choline, and vitamin B12, with vitamin D in the yolk.
FenugreekFoodThe seeds and leaves of the fenugreek plant used in South Asian cooking; a source of fiber and iron.
Peanut butterFoodA spread made from ground peanuts. A dietary source of plant protein, niacin, and monounsaturated fat.
PeanutsFoodThe edible seed of a legume that ripens underground, eaten roasted or boiled (distinct from peanut butter); a source of protein, niacin, folate, and monounsaturated fat.
Pumpkin seedsFoodFlat green seeds (pepitas) eaten roasted or raw. A dietary source of magnesium, zinc, and plant protein.
Sunflower seedsFoodSeeds of the sunflower eaten roasted or raw. A dietary source of vitamin E, magnesium, and selenium.
WalnutsFoodA tree nut with a distinctive folded shape. A dietary source of alpha-linolenic acid (a plant omega-3 fat), manganese, and copper.
A supplement form of the mineral zinc, taken as tablets, capsules, or lozenges; often paired with a small amount of copper to keep the two minerals in balance.