Glycemic Load Calculator mechanism

Model scope

The core arithmetic is correct, and the existing educational-not-medical-advice label is appropriate. Release requires explicit category thresholds, a definition of carbohydrate grams as available/digestible carbohydrate, a stated GI reference convention, and handling for missing or undefined GI values.

• GL=(GI×carb_g)/100 is the standard glycemic-load formula when GI is the food's GI relative to the glucose reference scale (glucose=100) and carb_g means grams of available/digestible carbohydrate in the stated portion.
• The category thresholds are not specified. A common convention is low ≤10, medium 11–19, and high ≥20, but the instrument must explicitly publish its chosen boundary rules.
• The carbohydrate input is ambiguous: total carbohydrate versus available carbohydrate (total carbohydrate minus fiber and sometimes sugar alcohols). Standard GL calculations generally use available/digestible carbohydrate.
• GI is highly dependent on food variety, preparation, ripeness, processing, and test protocol; a lookup value must identify the food form and source convention.

Units and conventions

• GI is dimensionless and uses the glucose-reference scale, with glucose assigned GI=100.
• carb_g is grams of available/digestible carbohydrate in exactly the portion being evaluated, not grams per 100 g unless the portion is 100 g.
• The worked category outputs assume the conventional thresholds low ≤10, medium 11–19, and high ≥20.
• GI should normally be constrained to 0–100; carbohydrate grams should be nonnegative.

Inspectable vector

One of 4 source-bound review vectors:

{
  "inputs": {
    "food": "glucose solution",
    "glycemic_index": 100,
    "carbohydrate_g": 25,
    "portion_description": "portion containing 25 g available carbohydrate"
  },
  "expected_outputs": {
    "glycemic_load": 25,
    "category": "high"
  },
  "reference_data": {
    "food": "glucose",
    "glycemic_index": 100,
    "source_convention": "International GI reference convention; glucose reference assigned GI=100 (widely tabulated standard value)"
  },
  "working": "GL=(GI×carb_g)/100=(100×25)/100=2500/100=25. Using low ≤10, medium 11–19, high ≥20: 25 is high."
}

Failure boundary

BREAK_CLAIMED · SELF_FLAGGED

The extreme-magnitude vector causes mathematical overflow in ordinary floating-point arithmetic, yielding Infinity or a non-finite result unless inputs are rejected or arbitrary-precision arithmetic is used. Category thresholds are also unspecified, and unit ambiguity can change the result substantially.

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche7/tranche7-results.json
• BOUNDARY_HAZARD_CATALOG.json