Protein Buying Guide

A practical guide to choosing the right protein powders, shakes, and supplements — and how to use our reviews to shop smarter on Amazon.

Protein Source

Not all proteins are the same. Whey is fast‑digesting and popular for recovery, while casein releases more slowly and is often taken before sleep. Plant‑based options such as pea, soy, or hemp are ideal for vegans or those avoiding dairy. Blended proteins combine different sources for balance.

👉 Choose the source that best fits your dietary needs and lifestyle.

Quality & Safety

A good protein supplement should be transparent about what’s inside. Check the label for protein content per serving, and look for fewer unnecessary fillers or artificial additives. Certifications such as “Informed Sport,” organic seals, or third‑party lab testing can provide extra confidence.

👉 Quality and safety are worth prioritising over flashy marketing.

Taste & Mixability

A protein only works if you’ll actually use it. Taste and texture make a big difference to consistency. Read reviews to see how flavours stack up, and whether powders mix well with water or milk. If available, try sample packs before investing in a large tub.

👉 A product you enjoy is one you’ll stick with.

Value & Fit

Don’t just compare prices — compare cost per gram of protein. Bulk packs often lower cost per serving, but balance savings against freshness and quality. Think about fit, too: vegan, gluten‑free, or allergen‑friendly options may be important, as well as format (powders, ready‑to‑drink shakes, or bars).

👉 The right product is one that fits both your budget and your goals.

Using Our Rankings & Reviews

We apply these same factors in our Editorial Reviews & Comparisons and Top Ten rankings, so you can see how popular products stack up side by side. All of our recommendations are unbiased, regularly updated 2 December 2025

Explore Top Tens →