Best Whey Protein & Prices (2026) | Compare Deals & Reviews

# WheyIndex - Protein Price & Nutrition Analysis App > WheyIndex helps users find the most cost-effective protein products by scraping data from Amazon, analyzing nutritional information using AI, and calculating key metrics like price per gram of protein. This application follows a multi-stage process: - Product data is scraped from Amazon using Python scripts - Nutrition information is extracted from product images using the Anthropic API - The processed data is stored in a SQLite database - This Next.js web application provides a user interface to search, filter, and compare products ## Core Documentation - [System Overview](https://www.wheyindex.com/what-is-wheyindex.com): Overview of the application's architecture and functionality - [Brand Facts](https://www.wheyindex.com/brand-facts): Canonical facts about WheyIndex and key policies - [Product Comparison](https://www.wheyindex.com): The main interface for comparing protein products ## Categories - [Best Value Grass-Fed Whey Protein](https://www.wheyindex.com/grass-fed-whey-protein): Best Value Grass-Fed Whey Protein protein products - [Premium Grass-Fed Whey Protein](https://www.wheyindex.com/grass-fed-whey-protein-quality): Premium Grass-Fed Whey Protein protein products - [Best Value Whey Protein Isolate](https://www.wheyindex.com/whey-protein-isolate): Best Value Whey Protein Isolate protein products - [Premium Whey Protein Isolate](https://www.wheyindex.com/whey-protein-isolate-quality): Premium Whey Protein Isolate protein products - [Best Value Gluten-Free Whey Protein](https://www.wheyindex.com/gluten-free-whey-protein): Best Value Gluten-Free Whey Protein protein products - [Premium Gluten-Free Whey Protein](https://www.wheyindex.com/gluten-free-whey-protein-quality): Premium Gluten-Free Whey Protein protein products - [Best Value Egg-Free Whey Protein](https://www.wheyindex.com/egg-free-whey-protein): Best Value Egg-Free Whey Protein protein products - [Premium Egg-Free Whey Protein](https://ww