Weight-gain plan for underweight adults
POST /weight-management/gain-plan · API key required
Maintenance energy (POST /energy/requirements, or maintenance_kcal) plus 500-1000 kcal a day (the chapter's example: 2400 maintains, 2900-3400 gains), protein 12-15% and fat about 30% of energy, expected rate (derived from the 3500 kcal/lb rule), the target weight range (BMI 18.5-24.9, or 23-24.9 in older adults) and the Table 21.12 foods for the +500 and +1000 tiers. Below BMI 18.5 no IOM equation applies, so send activity_factor or maintenance_kcal. Refuses BMI 25 or more and ages under 19.
Request body
Content type: application/json
Responses
200- Result with steps, warnings and sources400- Invalid input, or a request the chapter does not support (below 800 kcal, age 65+ deficit, BMI under 25 for loss, 25 or more for gain, pregnancy)401- Missing or invalid API key429- Rate limited