❓ Frequently Asked Questions

Why are the prices I see different from what's shown here?

Amazon prices change frequently throughout the day, and several factors can affect the price you see:

Regional pricing differences based on your location
Prime membership discounts and promotions
Subscribe & Save pricing options
Lightning deals and limited-time offers
Stock levels and seller availability

We recommend checking the current price on Amazon before making a purchase, as our data represents prices at the time of our last update.

How often are prices updated?

Our price data is typically updated every 24-48 hours to ensure reasonable accuracy while respecting Amazon's systems.

However, Amazon prices can change multiple times per day, so the most current pricing will always be found by clicking through to the product page.

We will include a "Last Updated" timestamp on each product for when that specific data was collected soon.

Why only these products?

We focus on popular, well-reviewed protein powders that offer good value and are readily available on Amazon. Our selection criteria include:

High customer ratings and review counts
Consistent availability and stock levels
Competitive protein content per serving
Variety across different price points and brands

We regularly review and update our product selection. If there is a specific protein powder you would like to see added, feel free to contact us!

Why are you using only Amazon links?

It's the only retailer with a large selection we could find that had a reliable API that is easily accessible. Others required approval and almost all disallow scraping of their websites explicitly in their robots.txt. For example see here and here. Other large retailers like Walmart and Costco either do not provide an API at all or require a approval process that a small website like ours would not qualify for.

How are you calculating $/gram of protein?

We calculate price per gram of protein as:

Price per gram = Total Price ÷ (Number of Servings × Protein per Serving)

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