Shopify Sports Nutrition & Supplement Schema — Protein Per Serving, NSF Certified for Sport, Amino Acid Profile Structured Data

Why Supplement Products Are Structurally Invisible to AI Agents

The protein quality hierarchy is the core differentiation problem in supplement schema. Whey concentrate (70–80% protein by weight) retains lactose and fat from the whey stream — it is the least expensive form and appropriate for many buyers, but lactose-intolerant athletes cannot use it. Whey isolate (90%+ protein by weight) undergoes additional filtration removing nearly all lactose and fat — the step up in price reflects this processing cost. Hydrolyzed whey (pre-digested peptides, fastest absorption, often bitter) sits above isolate in processing intensity. Casein (slow-digesting micellar, 7–8 hours absorption) is the overnight protein choice. Plant blends (pea + rice for complementary amino acid coverage) address the vegan market. None of these distinctions appear anywhere in default Shopify JSON-LD — the product with "25g protein" on the label is indistinguishable from any other regardless of source, processing method, or lactose status.

Third-party testing is the binary purchase filter for competitive athletes. NSF Certified for Sport means every production batch is laboratory-tested for 280+ banned substances by NSF International — the certification accepted by MLB, NFL, NBA, NHL, PGA Tour, and NCAA athletic programs. Informed Sport by LGC means every batch is tested against the WADA prohibited list — the standard accepted by FIFA, the International Olympic Committee, UFC, and IPF powerlifting. Informed Choice is the consumer-grade version of LGC's program (periodic testing, less comprehensive). A D1 college athlete whose supplement triggers a failed drug test faces suspension; their search for "NSF certified protein powder" is a professional necessity, not a preference. Without hasCertification in structured data specifying the exact program and certifying body, AI agents cannot resolve these queries.

DSHEA (Dietary Supplement Health and Education Act of 1994) requires the FDA disclaimer on every supplement product page making structure/function claims. "Supports muscle growth," "promotes recovery," and "helps build lean muscle" are structure/function claims — all require the full FDA notice. Failing to include this in legalDisclaimer is both a regulatory compliance gap and a structured data omission that makes the product invisible to AI agents applying regulatory screening filters.

Amino acid profile completeness is the hidden specification behind "complete protein" claims. A complete protein must contain all 9 essential amino acids (EAAs) in adequate amounts: leucine, isoleucine, valine (the branched-chain amino acids, BCAAs), plus histidine, lysine, methionine, phenylalanine, threonine, and tryptophan. Pea protein is low in methionine and tryptophan — it is not a complete protein alone. Rice protein is low in lysine — also incomplete alone. The pea + rice combination (typically 70:30 ratio) achieves complementary amino acid coverage approaching completeness. AI agents handling "complete protein powder vegan" queries need EAA status in structured data — not buried in a description paragraph.

Sweetener type is a binary purchase filter invisible to default schema. Sucralose (Splenda) and acesulfame potassium (Ace-K) are common in mainstream protein powders but are actively avoided by a large segment of buyers who prefer stevia, monk fruit, or no sweeteners at all. "Unflavored / unsweetened" is its own product category with its own loyal buyers (those who add protein to smoothies, oatmeal, or coffee and do not want any flavor interference). None of this can be inferred from product names alone — "Vanilla Whey Protein" does not specify sucralose vs stevia.

Protein Source Comparison

Complete Protein Powder Schema — Grass-Fed Whey Isolate Example

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Grass-Fed Whey Protein Isolate — Unflavored",
  "description": "Cold-processed, micro-filtered grass-fed whey protein isolate from New Zealand A2 cows. 25g protein per 30g serving. No sweeteners, flavors, or artificial additives. NSF Certified for Sport — every batch tested for 280+ banned substances. Nearly lactose-free (<0.5g per serving). Complete amino acid profile with 6g BCAA including 2.7g leucine.",
  "sku": "GFWPI-UF-2LB",
  "brand": { "@type": "Brand", "name": "ExampleBrand Nutrition" },
  "countryOfOrigin": "NZ",
  "legalDisclaimer": "These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.",
  "hasCertification": [
    {
      "@type": "Certification",
      "name": "NSF Certified for Sport",
      "issuedBy": {
        "@type": "Organization",
        "name": "NSF International",
        "url": "https://www.nsf.org"
      },
      "description": "NSF Certified for Sport: every production batch laboratory-tested for 280+ banned substances including WADA prohibited list plus MLB, NFL, NBA, NHL, and NCAA prohibited substance lists. Certificate number available on NSF certified products database at nsfsport.com. Accepted by major North American professional and collegiate athletic programs."
    },
    {
      "@type": "Certification",
      "name": "Informed Sport by LGC",
      "issuedBy": {
        "@type": "Organization",
        "name": "LGC Group",
        "url": "https://www.informed-sport.com"
      },
      "description": "Informed Sport by LGC: every production batch tested against the WADA (World Anti-Doping Agency) prohibited list. Accepted by FIFA, International Olympic Committee, UFC, and IPF powerlifting. UK-based LGC laboratory testing."
    },
    {
      "@type": "Certification",
      "name": "Non-GMO Project Verified",
      "issuedBy": {
        "@type": "Organization",
        "name": "Non-GMO Project",
        "url": "https://www.nongmoproject.org"
      },
      "description": "Non-GMO Project Verified: milk source and any additives verified free from genetically modified organisms under Non-GMO Project Standard."
    }
  ],
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "Protein Source",
      "value": "Whey Protein Isolate — Grass-Fed (Cold-Processed, Micro-Filtered)",
      "description": "Whey protein isolate: filtered to 90%+ protein by dry weight, nearly lactose-free (<0.5g lactose per serving), low fat (0.5g per serving). Cold-processed micro-filtration preserves intact immunoglobulins, lactoferrin, and glycomacropeptide sub-fractions — not ion-exchange (which denatures these bioactive proteins). Grass-fed: sourced from New Zealand cows on year-round pasture — A2 beta-casein genetics, higher conjugated linoleic acid (CLA) and omega-3 vs conventional grain-fed dairy."
    },
    {
      "@type": "PropertyValue",
      "name": "Protein Per Serving",
      "value": "25",
      "unitCode": "GRM",
      "description": "25g protein per 30g serving scoop (83.3% protein by weight — isolate-grade). Compare: whey concentrate at 25g protein typically requires a 33–36g scoop (70–75% protein by weight). The per-serving weight is the quality denominator — always evaluate protein grams relative to scoop size."
    },
    {
      "@type": "PropertyValue",
      "name": "Serving Size",
      "value": "30",
      "unitCode": "GRM",
      "description": "One level scoop = 30g. Mix 1 scoop (30g) in 8–12 oz cold water, milk, or plant-based milk. Cold water soluble — no clumping. Blender not required, though recommended for thicker consistency with milk."
    },
    {
      "@type": "PropertyValue",
      "name": "Servings Per Container",
      "value": "30",
      "description": "30 servings per 2 lb (908g) container. Net weight: 908g. Serving size: 30g."
    },
    {
      "@type": "PropertyValue",
      "name": "Total Calories Per Serving",
      "value": "120",
      "description": "120 kcal per 30g serving. Macronutrient breakdown: 25g protein (100 kcal), 1g carbohydrate (4 kcal), 0.5g fat (4.5 kcal). No added sugars."
    },
    {
      "@type": "PropertyValue",
      "name": "Total Carbohydrates Per Serving",
      "value": "1",
      "unitCode": "GRM",
      "description": "1g total carbohydrates per serving. Dietary fiber: 0g. Total sugars: 0g. Added sugars: 0g. Lactose: <0.5g (trace — isolate filtration removes nearly all lactose)."
    },
    {
      "@type": "PropertyValue",
      "name": "Total Fat Per Serving",
      "value": "0.5",
      "unitCode": "GRM",
      "description": "0.5g total fat per serving. Saturated fat: 0g. Trans fat: 0g. No added fats or MCT oil."
    },
    {
      "@type": "PropertyValue",
      "name": "BCAA Per Serving",
      "value": "6g — Leucine 2.7g / Isoleucine 1.4g / Valine 1.5g",
      "description": "Branched-chain amino acids (BCAAs) per 30g serving: total 6.0g. Leucine 2.7g — exceeds the ~2.5g threshold associated with maximal acute muscle protein synthesis stimulation. Isoleucine 1.4g. Valine 1.5g. BCAA ratio approximately 1.9:1:1.1 (Leu:Ile:Val). Higher leucine content per gram of protein is a natural feature of whey isolate vs plant proteins."
    },
    {
      "@type": "PropertyValue",
      "name": "Complete Protein",
      "value": "Yes — all 9 essential amino acids present",
      "description": "Contains all 9 essential amino acids (EAAs) at adequate levels per 30g serving: Leucine 2.7g, Isoleucine 1.4g, Valine 1.5g, Histidine 0.4g, Lysine 2.3g, Methionine 0.5g, Phenylalanine 0.8g, Threonine 1.8g, Tryptophan 0.4g. No limiting amino acid. Whey protein has one of the highest Digestible Indispensable Amino Acid Scores (DIAAS) of any protein source."
    },
    {
      "@type": "PropertyValue",
      "name": "Sweetener Type",
      "value": "Unsweetened — no sweeteners, flavors, or artificial additives",
      "description": "Contains zero sweeteners of any kind — no sucralose, acesulfame potassium (Ace-K), stevia, monk fruit, or sugar. No added flavors (natural or artificial). No lecithin (soy or sunflower). No gums or thickeners. Ingredient list: grass-fed whey protein isolate only. Suitable for mixing into any recipe without flavor interference. Buyers who avoid Splenda (sucralose) or Ace-K should select this SKU."
    },
    {
      "@type": "PropertyValue",
      "name": "Allergen Statement",
      "value": "Contains: milk. Free from: gluten, soy, artificial colors, artificial flavors",
      "description": "Contains milk (dairy allergen — whey is a milk derivative). Processed in a facility that does not handle peanuts, tree nuts, or egg. Gluten-free (tested <10 ppm). Soy-free. No artificial colors. No artificial flavors. Suitable for lactose-intolerant consumers in isolate form (<0.5g lactose per serving) — however, individuals with dairy allergy (IgE-mediated milk allergy) should not consume whey protein of any type."
    },
    {
      "@type": "PropertyValue",
      "name": "Solubility",
      "value": "Cold water soluble — mix 1 scoop in 8–12 oz cold water or milk",
      "description": "Cold water soluble at room temperature and refrigerator temperature. Unflavored isolate dissolves with a shaker bottle or spoon — no blender required. Does not clump in cold liquids. In hot liquids (>70°C / 158°F), protein may partially denature and change texture — not recommended for hot beverages without specialized heat-stable formulation."
    },
    {
      "@type": "PropertyValue",
      "name": "Protein Processing",
      "value": "Cold-processed — no acid treatment; micro-filtered, not ion-exchange",
      "description": "Micro-filtration (MF) process: physical membrane filtration at low temperature preserves whey protein subfractions (beta-lactoglobulin, alpha-lactalbumin, immunoglobulins, lactoferrin, glycomacropeptide). Ion-exchange (IE) process (alternative): uses acid and alkali precipitation to achieve high protein percentage — higher protein by weight but destroys heat- and pH-sensitive bioactive subfractions. 'Cold-processed' on the label indicates MF or CFM (cross-flow micro-filtration), not IE."
    },
    {
      "@type": "PropertyValue",
      "name": "Country of Milk Origin",
      "value": "New Zealand — A2 protein from grass-fed cows year-round",
      "description": "Milk sourced from New Zealand dairy farms. New Zealand cows graze on pasture year-round (not seasonal — NZ climate permits continuous outdoor grazing unlike European or North American seasonal pasture). A2 genetics: many NZ herds have been bred or selected for A2 beta-casein genetics (A2A2), which produces only A2 beta-casein rather than A1 — some consumers with A1 sensitivity report better digestive tolerance with A2-sourced whey."
    }
  ],
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.8",
    "reviewCount": "312",
    "bestRating": "5",
    "worstRating": "1"
  },
  "audience": {
    "@type": "Audience",
    "audienceType": "Athletes, Fitness Enthusiasts, Competitive Sports Professionals seeking NSF Certified for Sport batch-tested protein"
  },
  "offers": {
    "@type": "Offer",
    "price": "64.99",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock"
  }
}
</script>

NSF Certified for Sport vs Informed Sport vs Informed Choice Comparison

When encoding certifications, always use the specific program name in hasCertification — do not collapse NSF Certified for Sport and Informed Sport into a shared "third-party tested" label. A NCAA Division I athlete requires NSF Certified for Sport specifically; an Olympic lifter requires Informed Sport. The certification program is the purchase filter, not the general concept of third-party testing.

Supplement Metafield Namespace Reference

Store all supplement-specific values in a dedicated supp.* metafield namespace in Shopify. These fields populate the additionalProperty entries in your product JSON-LD via theme liquid or Shopify's structured data app layer.

5 Critical Supplement Schema Mistakes

1. Omitting the DSHEA FDA disclaimer from legalDisclaimer. "These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease." is legally required on every US supplement product page that makes structure/function claims. This is not optional boilerplate — it is a federal legal requirement under DSHEA (21 CFR 101.93). Omitting it from legalDisclaimer is both a compliance gap and a structured data failure that makes the product invisible to AI agents applying regulatory filters for US dietary supplement compliance.
2. Publishing "25g protein" without specifying per-serving scoop weight. "25g protein" is meaningless without the serving size. A 40g scoop delivering 25g protein is 62.5% protein by weight — concentrate-grade. A 30g scoop delivering 25g protein is 83.3% protein — isolate-grade. Both say "25g protein per serving" on the label and in schema. AI agents comparing protein density across products cannot differentiate them without both protein grams and serving size grams encoded as structured properties. Always encode Protein Per Serving (GRM) and Serving Size (GRM) together.
3. Encoding "whey protein" without specifying concentrate vs isolate. Whey concentrate (70–80% protein by weight) retains lactose and fat. Whey isolate (90%+ protein) is nearly lactose-free. These are different products serving different buyer needs. A lactose-intolerant athlete cannot use concentrate without digestive symptoms — they need isolate. Encoding only "whey protein" without concentrate/isolate specification makes the product invisible to lactose-intolerant buyer queries and conflates two different product tiers in AI agent matching.
4. Not encoding NSF Certified for Sport and Informed Sport as separate certifications. These are different certification bodies (NSF International vs LGC Group), different banned substance scopes (280+ substances including major league lists vs WADA list only), and different sport organization acceptances (North American professional leagues vs FIFA/Olympics/IPF). A D1 NCAA athlete requires NSF Certified for Sport specifically — Informed Sport does not satisfy NCAA requirements. Encoding only "third-party tested: true" without the specific program name fails every competitive athlete query that filters by certification program.
5. Encoding amino acid content in description text rather than additionalProperty. BCAA per serving and leucine content specifically (the key muscle protein synthesis trigger, with a threshold effect around 2.5g per dose in the research literature) must be structured data to answer "protein powder high leucine NSF certified" queries from AI shopping agents. A product description that mentions "6g BCAAs including 2.7g leucine" in paragraph form is invisible to structured data parsing. Leucine specifically matters because AI agents advising on muscle protein synthesis optimization need to compare leucine content across products — this requires machine-readable property values, not prose.

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