ForHosting KIT · Developer Utilities

Vitamin daily intake calculator

Recommended daily vitamin intakes are not one number: they change with age, with sex, and with pregnancy or lactation, and each vitamin is reported in its own unit.

● BetaFree · in your browser

Run — free How it works & API

Use it from WebAPIEmailTelegramApp soon

This vitamin daily intake calculator looks up the Institute of Medicine Dietary Reference Intake—Recommended Dietary Allowance where one exists, Adequate Intake where it does not—for a named vitamin from those three facts. Send vitamin, age, sex, and pregnancy; the engine maps age onto the published DRI band, applies the sex- and pregnancy-specific row, and returns amount with its unit so meal planners, prenatal checklists, and nutrition apps can show a single daily target. Names that are not in the closed reference table fail with invalid_input instead of inventing a dose. The same pure lookup powers the free browser widget and the prepaid API, with no network, no model, and no clock, so fixtures pin byte-for-byte. Successful API items bill at $0.002; validation failures are not charged.

How to use it

Enter your values in the form above. The tool checks them before calculating and shows the result on the same page.

Check your inputs

Use the labels and units shown next to each field. If something is missing or outside the allowed range, the page points to the field to fix.

Use it again or automate it

Use the browser tool for individual checks and the API when you need the same capability in an automated workflow.

What you can do with it

Get an answer now

Enter one set of values and see the result without building a spreadsheet or script.

Compare scenarios

Change one value at a time and rerun the calculation to understand what affects the result.

Automate repeated work

Use the API when the same calculation needs to run inside your product or workflow.

FAQ

How is the recommended daily vitamin intake calculated?

The engine maps age onto an IOM DRI band, then reads the sex- and pregnancy-specific cell for the named vitamin. It returns amount with its unit and kind RDA or AI; it does not estimate intake from foods.

What happens if the vitamin name is not in the table?

The request fails with invalid_input. Only the closed reference set (vitamins A, C, D, E, K, and B1–B12 under their aliases) is accepted; unknown names are not billed.

Can men request a pregnant or lactating value?

No. Pregnancy and lactation rows apply only to females aged 14–50 years. Other combinations fail with invalid_input rather than returning the non-pregnant cell.

Is the vitamin daily intake calculator free?

The browser tool runs free on your device. API calls use prepaid KIT balance at $0.002 per successful item; validation failures are not charged.

What is the difference between RDA and AI in the result?

kind is RDA when the Institute of Medicine published a Recommended Dietary Allowance for that cell, and AI when only an Adequate Intake exists (for example vitamin K, biotin, and most infant rows).

For developers — API access

Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.

API endpoint

POSThttps://api.kit.forhosting.com/health/vitamin

Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.

Call it from your stack

curl -X POST https://api.kit.forhosting.com/health/vitamin \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"vitamin":"c","age":30,"sex":"female","pregnancy":"none"}'

const res = await fetch("https://api.kit.forhosting.com/health/vitamin", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "vitamin": "c",
    "age": 30,
    "sex": "female",
    "pregnancy": "none"
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/health/vitamin",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "vitamin": "c",
    "age": 30,
    "sex": "female",
    "pregnancy": "none"
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/health/vitamin", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"vitamin":"c","age":30,"sex":"female","pregnancy":"none"}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"vitamin":"c","age":30,"sex":"female","pregnancy":"none"}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/health/vitamin", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)

Example request

{
  "vitamin": "c",
  "age": 30,
  "sex": "female",
  "pregnancy": "none"
}

Example response

{
  "task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
  "type": "health.vitamin",
  "status": "queued",
  "_links": {
    "result": "/tasks/tsk_…/result"
  }
}

The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.

Pricing

Per request$0.002

Published price — no tokens, no invented credits. A failed task is never charged.

Errors

HTTP	Code	Meaning
`401`	`unauthorized`	Missing or invalid API key.
`402`	`insufficient_balance`	Your balance doesn't cover the task price.
`404`	`unknown_type`	That task type doesn't exist.
`429`	`rate_limited`	Too many requests. Use the webhook instead of polling.

Read the full KIT documentation →