One nutrient, five standards: taurine across the US, EU, China, Korea and Japan's gap

Taurine is one of the smallest molecules in pet nutrition and one of the most consequential. A cat that does not get enough of it goes blind, then worse. Yet ask five major economies for their taurine number and you get five different answers — and, in one case, no number at all. This article lines up the cat taurine minimums from five regulatory regimes side by side, and uses the comparison to expose a quieter story: Japan, the world's third-largest pet-food market, regulates pet food as a safety problem and publishes no nutrient adequacy table whatsoever.

Why this one amino acid

The reason taurine dominates cat-food regulation is biological, not bureaucratic. As one AAFCO source puts it plainly, "taurine is an essential amino acid (cats cannot synthesize sufficient amounts endogenously)". Dogs, by contrast, make their own: AAFCO notes "taurine is not an AAFCO-required nutrient — dogs can synthesize it from methionine and cysteine". That single physiological fact is why every cat-food standard in this survey sets a taurine floor and no dog-food standard does.

The other biological wrinkle is heat. "Extruded cooking destroys taurine," as the AAFCO 2014 dry-matter profile notes, and FEDIAF adds that "heat-processed wet food lowers taurine bioavailability". That is the root cause of a pattern we will see repeated in every regime: canned food needs more taurine per unit of dry matter than dry food.

United States — AAFCO

The US model sets the cleanest split. The AAFCO cat food nutrient profile "sets a taurine minimum of 0.10% DM (1000 mg/kg) on a dry-matter basis", with "0.20% DM (2000 mg/kg) for canned cat food". Restated on the same basis, that is "0.10% DM for extruded (dry) and 0.20% DM (2000 mg/kg) for canned". On a calorie basis the US profiles dataset lists "Taurine minimums ... 0.25 g/1000 kcal ME for extruded (dry) food and 0.5 g/1000 kcal ME for canned food". Either way the ratio is the same: canned needs twice the dry-food level.

European Union — FEDIAF

FEDIAF's 2025 guidelines set taurine at "Taurine minimum (dry pet food) 0.13 / 0.10 g adult and 0.10 g growth/repro" and "(canned pet food) 0.27 / 0.20 g adult and 0.25 g growth/repro" — all per 100 g DM. The canned-to-dry multiplier is explicit in the guideline text: "canned foods need roughly 2-2.5 times the dry-food level".

What is striking is how stable those numbers are. The FEDIAF historical nutrient tables for cat adult maintenance — the 2021, 2022, 2024 and 2025 editions — each list, verbatim, "Taurine (canned pet food) g 0.27 0.20 0.25" and "Taurine (dry pet food) g 0.13 0.10 0.10". Four consecutive guideline editions, identical taurine rows. (For the record, this article uses only the 2021, 2022, 2024 and 2025 historical tables; the 2018, 2019, 2020 and 2023 editions are not used because those topics are pending placeholders with no real values.)

China — GB/T 31217-2014

China's voluntary national standard for complete cat food sets, on a dry-matter basis, "taurine ≥0.1% (dry food) and ≥0.2% (wet food) for both life stages". That is almost a direct mirror of the US AAFCO split: 0.1% dry, 0.2% wet, applied to both adult and growth/reproduction stages alike. Notably, the standard "does not set requirements for vitamin A, arginine, or methionine" — taurine is one of the few amino-acid-level specifics it bothers to pin down.

South Korea — NIAS 2024

Korea's first-edition NIAS Pet Food Nutrient Standard (National Institute of Animal Science, Rural Development Administration, 2024-10) is "in force; referenced by MAFRA Notice". On taurine, the Korean cat tables explicitly defer outward rather than invent a national figure: the cat-growth table lists "Taurine per FEDIAF/AAFCO/NIAS minima". In other words, Korea's 2024 standard anchors its taurine requirement to the same international floors the US and EU already publish. (The companion per-100 g DM taurine table — the nias_nutrient_003 topic — was not present in the repository at writing, so no independent Korea-specific taurine number is cited here; the ME-basis topic is the only first-hand Korea source available.)

Japan — the gap

And then there is Japan. The only first-hand Japan source in this repository is the Pet Food Safety Act (第五条). Its operative clause empowers the ministers to act "to prevent harm to pet-animal health" by setting "manufacturing/method-or-labelling standards and compositional specifications for pet-animal feed" — the original Japanese authorizes the ministers to "愛がん動物用飼料の成分につき規格を定めることができる" (set compositional specifications).

Read that wording carefully: it is a safety and composition statute. It authorizes specifications to stop feed from harming animals. It is not a nutrient profile — there is no table of minimum taurine, arginine, or calcium levels for a complete cat food. The repository's intended Japan nutrient-table topic (jp-standards_001) is absent, and the one Japan source that does exist contains no taurine level at all. So the comparison is not "Japan sets taurine at X"; it is "Japan sets no taurine number in its pet-food law that we can find." For a major economy, the absence of a nutrient table is itself the finding.

Reading the numbers side by side

On a dry-matter basis, the four regimes that actually publish a taurine floor cluster tightly:

• US (AAFCO): 0.10% DM dry, 0.20% DM canned
• EU (FEDIAF 2025): 0.13 / 0.10 g per 100 g DM dry, 0.27 / 0.20 g per 100 g DM canned
• China (GB/T 31217-2014): ≥0.1% dry, ≥0.2% wet
• Korea (NIAS 2024): "Taurine per FEDIAF/AAFCO/NIAS minima" (no independent figure in the available source)
• Japan: no nutrient table; only a safety/compositional act

Two patterns hold across all four publishing regimes. First, every one of them sets the canned/wet floor at roughly double the dry floor — AAFCO exactly 2×, FEDIAF 0.27 vs 0.13 (about 2.1×) and 0.20 vs 0.10 (exactly 2×), China exactly 2×. Second, the absolute levels are remarkably close: most sit at 0.10–0.13% DM dry and 0.20–0.27% DM wet. The science converges even when the paperwork diverges.

Why the gap matters

The five-regime view is a useful lens precisely because four of them agree and one does not. Where the US, EU, China and (by reference) Korea all treat taurine as a minimum nutrient that a complete cat food must contain, Japan treats pet food as a safety commodity whose composition must simply not harm the animal. That is a legitimate regulatory philosophy — but it means a Japanese cat-food label is governed by a different logic than its American or European counterpart, and a buyer comparing "taurine content" across borders is comparing a number against a blank.

For formulators, the practical takeaway is simple: if you manufacture to AAFCO, FEDIAF or GB/T 31217 levels, you are already comfortably inside the international consensus of ~0.10% DM dry / ~0.20% DM wet. The outlier is not a competing number — it is the absence of one.

Sources

All figures are verbatim substrings of the source topics below. FEDIAF year-over-year comparison uses only 2021, 2022, 2024 and 2025 historical tables; the 2018, 2019, 2020 and 2023 editions were not cited (pending placeholders, no real values).

• AAFCO_Ch6_taurine — taurine essential for cats; 0.10% DM (1000 mg/kg) dry / 0.20% DM (2000 mg/kg) canned; dogs not required to have taurine.
• AAFCO_2014_cat_DM_basis — 1000 mg/kg DM dry, 2000 mg/kg DM canned; extruded cooking destroys taurine.
• AAFCO_2014_cat_calorie_basis — 0.25 g/1000 kcal ME dry, 0.5 g/1000 kcal ME canned; 0.10% DM on dry-matter basis.
• FEDIAF_2025_cat_arginine_taurine — dry 0.13/0.10 g, canned 0.27/0.20 g per 100 g DM; canned needs roughly 2-2.5× the dry-food level.
• fediaf_historical_2021_cat_adult_maintenance — Taurine canned 0.27/0.20, dry 0.13/0.10 (USED).
• fediaf_historical_2022_cat_adult_maintenance — Taurine canned 0.27/0.20, dry 0.13/0.10 (USED).
• fediaf_historical_2024_cat_adult_maintenance — Taurine canned 0.27/0.20, dry 0.13/0.10 (USED).
• fediaf_historical_2025_cat_adult_maintenance — Taurine canned 0.27/0.20, dry 0.13/0.10 (USED).
• CN_GB31217_2014_complete_cat_food — taurine ≥0.1% dry, ≥0.2% wet, both life stages; no arginine/methionine/vitamin A requirements.
• kr_nias_nutrient_me_basis — NIAS 2024 (in force; MAFRA Notice); cat tables list "Taurine per FEDIAF/AAFCO/NIAS minima".
• jp_petfood_safety_act_full_standards — used as the de-facto Japan source because jp-standards_001 was absent on disk: Pet Food Safety Act §5 sets compositional specifications / manufacturing & labelling standards to prevent harm; contains no taurine nutrient level.

Topics listed but not found on disk (no fabricated values):

• nias_nutrient_003 — missing; Korea taurine per-100 g DM table unavailable, so no independent Korea taurine figure is cited.
• jp-standards_001 — missing; intended Japan nutrient-table topic unavailable, which is itself the basis for the "Japan has no nutrient table" finding.

Authored by codebuddy · Compiled from 11 verified Pet Data Station topics (sources available on request).