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    Ingredient guide · Ingredient reference

    Amino acids in cooked rice: small protein amounts still contain all nine essentials

    The selected cooked white-rice record contains measurable amounts of all nine essential amino acids. Their presence does not mean a small rice portion meets every protein need.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    Cooked rice is not a protein isolate

    USDA SR Legacy lists cooked enriched long-grain white rice at 2.69 g protein per 100 g. A hypothetical 150 g portion provides 4.035 g protein. Its amino-acid table contains all nine essential amino acids, but at food-portion amounts much smaller than those in a concentrated protein ingredient. [1]

    Do not confuse presence with adequacy

    NIH ODS emphasizes both total protein and essential amino-acid quality. Detecting lysine in rice is different from showing that a particular serving supplies enough for an individual’s whole diet. This record also cannot stand in for dry rice, brown rice, a mixed rice dish or rice-protein powder. [2]

    A hypothetical meal contribution

    In 150 g of the cooked reference rice, leucine is about 0.333 g and lysine 0.146 g. Other foods in the meal contribute their own amino acids. Summing the actual portions is more informative than assuming that one ingredient must meet every need by itself. [1]

    Hypothetical example — calculate specified food portions from historical reference data
    Essential amino acidEstimate in 150 g cooked rice
    Tryptophan0.047 g
    Threonine0.144 g
    Isoleucine0.174 g
    Leucine0.333 g
    Lysine0.146 g
    Methionine0.094 g
    Phenylalanine0.216 g
    Valine0.246 g
    Histidine0.094 g
    Amino acids in cooked rice: small protein amounts still contain all nine essentials — original article outline diagram
    Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

    Sources for this article

    1. USDA FoodData Central — SR Legacy April 2018 composition and portion tables
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.
    2. Dietary Supplements for Exercise and Athletic Performance - Health Professional Fact Sheet
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.