Oyster牡蠣
Signature ingredient: Zinc — B-grade evidence (Immune Function, ~545% of the studied dose per serving)
Standard nutrients per USDA FoodData Central · phytochemicals (lutein / K2 / sulforaphane etc.) are literature estimates, varying by variety and processing
S / A … ingredient evidence tier (tap for the claim) | bar = how much of the studied dose one serving of Oyster gives you
Meaningful intake one serving delivers a real fraction of the studied dose
Iron
9mg · 50% DV · Heme iron, well absorbed
S Iron Deficiency Anemia →
＋ Heart Failure A・Pregnancy A
≈ 50% of studied dose
Vitamin B12
25ug · 1042% DV · Very high
A B12 Deficiency Anemia →
＋ Pernicious Anemia A・Neuropathy B
≈ 1042% of studied dose
Copper
4mg · 444% DV
A Micronutrient Deficiency →
＋ Neuropathy B・Cardiovascular Disease C
≈ 444% of studied dose
Zinc
60mg · 545% DV · Highest whole-food zinc source (varies widely by species/season)
B Immune Function →
＋ Age-related Macular Degeneration A・Diarrhea Pediatric A
≈ 545% of studied dose
Why this page doesn't claim "Oyster works"
Whole foods almost never have RCTs — the evidence sits on the ingredients. So this page does one honest thing: it lists which graded ingredients Oyster contains, how much, and how far that is from the studied dose. It makes no efficacy claim about Oyster itself.
Bottom line: The oyster is the whole-food king of zinc (one serving far exceeds the daily requirement); vitamin B12, copper, selenium, and heme iron are all very high too. One of the few foods where almost every nutrient is at a meaningful amount.
Every tier links to its full evidence page · Methodology →