---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/nutrition-data/use-cases/research-macronutrient-profiles/claude
---
# How to Research Macronutrient Profiles with Claude

Claude transforms macro research into an exploratory conversation. Start by comparing a few protein sources, then drill into the ones with the best ratio, ask about preparation methods that affect macros, and build a shortlist of foods that hit your targets. Each follow-up question refines your research without starting over.

## Setup

claude mcp add toolrouter -- npx -y toolrouter-mcp

## Steps

1. Connect ToolRouter: claude mcp add toolrouter -- npx -y toolrouter-mcp
2. Ask Claude: "Look up the macronutrient profile of chicken breast, tofu, and lentils using nutrition-data"
3. Claude retrieves and compares the macros for each food
4. Ask: "Which has the highest protein-to-calorie ratio?"
5. Use the comparison to choose the best foods for your macro targets

## Example Prompt

```
Compare the protein, fat, and carb profiles of these foods per 100g: chicken breast, salmon, eggs, Greek yogurt, and tofu. Which is best for a high-protein, low-fat diet?
```

## Tips

- Ask Claude to rank foods by specific macro ratios
- Request data per 100g for fair cross-food comparisons
- Build a shortlist of foods that meet your specific macro targets
