Source: https://guthlabs.ai/docs/instruments/glycemic-load-calculator/implementation/

instrument implementation / implementation-contract

# Glycemic Load Calculator implementation

A source-bound implementation contract for Glycemic Load Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t7-079

**Effect**: Computation or source lookup only

## Input and validation requirements

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.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "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."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/glycemic-load-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/glycemic-load-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/glycemic-load-calculator/qualification/>)

## 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`