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Compare the protein powders, creatine and other supplements commonly marketed alongside muscle-gain training. This guide covers labels, authorised wording and the limits of the claims, without promising a result from a product.
Do you actually need supplements to build muscle?
Supplements are supplementary. Before you spend a cent, three basics come first:
- Progressive overload. Muscle grows in response to a training stimulus that gradually increases. If your sessions never get harder, no supplement will rescue them. Start with progressive overload and how many sets and reps build muscle.
- Enough total protein. Spread your protein across meals. Whole foods should do most of the work. Find your number in how much protein you need each day.
- Enough calories and sleep. Related reading: rest days and recovery.
Get those right, then think about supplements. They come after these basics, not instead of them.
The two supplements with an authorised EU claim
Two of them have an authorised EU claim.
1. Protein powder (usually whey)
Protein is the raw material your muscles repair and grow with, and EU rules authorise two claims for protein. Separately, a 2018 systematic review and meta-analysis of 49 resistance-training trials (1,863 participants) examined protein supplementation alongside resistance training (Morton et al., Br J Sports Med). Whey is the popular choice because it’s a complete protein that mixes in seconds — a single scoop is a fast way to add a meaningful amount of protein toward your daily total. If dairy doesn’t suit you, a complete plant blend is an alternative — we compare them in whey vs plant protein. Start at the complete whey protein guide.
2. Creatine monohydrate
Creatine is one of the few supplements with an authorised performance claim. The International Society of Sports Nutrition’s position stand reviews decades of trials on creatine monohydrate and high-intensity exercise capacity. It’s inexpensive, and monohydrate is the standard form. Details in the creatine guide, with the dose specifics in creatine dosage.
At a glance: evidence-graded comparison
Where each supplement actually stands, in one table — useful when you’re comparing options rather than reading paragraph by paragraph.
| Supplement | EU-authorised claim? | Authorised EU claim | Who it’s for |
|---|---|---|---|
| Protein / whey | Yes | Yes (see above) | Anyone short of their daily protein target from food |
| Creatine monohydrate | Yes | Yes (see above) | People who train with weights |
| Pre-workout | No | None | Early or low-energy sessions, if caffeine suits you |
| BCAAs / EAAs | No | None | See the BCAA note below |
| Mass gainers | No | None | People who genuinely can’t eat enough food to gain weight |
Other supplements
These are other supplements that often appear on “muscle gain” lists.
- Pre-workout. A good pre-workout (mainly caffeine, often with citrulline and beta-alanine) is what many people reach for before an early or low-energy session. There’s no authorised EU health claim for any of those ingredients. See pre-workout vs coffee.
- BCAAs and EAAs. There is no authorised health claim for BCAAs, and we won’t pretend otherwise. We cover them in BCAAs and amino acids and do you need BCAAs if you take whey.
- Mass gainers. These are mostly sugar and maltodextrin with some protein. If you struggle to eat enough, real food calories (or a homemade shake) are an alternative to a branded “gainer”.
- Everything else. Test boosters, glutamine and exotic “anabolic” blends are not covered on this page.
A simple muscle-gain stack
A short stack looks like this:
- Whey (or a complete protein powder) — a protein source.
- Creatine monohydrate — the exact EU-authorised wording is in the box on this page.
- Optional: a pre-workout or coffee — only if you train early or flat.
That’s it. It pairs with our beginner supplement stack if you’re just starting out.
The basics of muscle gain
Supplements come last. The basics are dull:
- Train each muscle 2× a week with roughly 10–20 hard sets per muscle group over the week, taken close to failure — see sets and reps for muscle.
- Add load over time using progressive overload — one more rep or the smallest weight jump beats chasing soreness.
- Eat in a slight surplus with enough protein every day.
- Sleep 7–9 hours and take rest days — see our recovery guide.
- Be patient. Real muscle is built over months and years, not weeks.
Best supplements for beginners — and for strength, not just size
If you’re new to training, ignore the noise entirely: start with protein and creatine, and nothing else. See our full beginner supplement stack for exact starting doses and order of priority. The exact EU-authorised wording for creatine is in the box on this page. Strength itself is built the same way muscle is — through progressive overload and consistent, hard training over months; no supplement substitutes for that.
What a good whey and creatine stack looks like
We won’t rank competing products we can’t independently verify. The basics are simple: Whey Protein for hitting your protein target, and Creatine Monohydrate. Shopping around first? You can compare current supplement prices and check the value of any tub before you buy.
Related: Complete whey protein guide · Creatine guide · Beginner supplement stack · Training & gym guides.
Related reading
If you are buying rather than just researching, our 2026 whey protein buyer’s guide and best protein powder for Malta & Cyprus cover what to look for on the label. Shopping from the islands? See sports supplements in Malta for VAT-inclusive local pricing.
Frequently asked questions
What are the best supplements for muscle gain?
A protein powder such as whey and creatine monohydrate are the two this guide covers first. The exact EU-authorised wording is shown in the box on this page. Other supplements are covered further down.
Do I need supplements to build muscle at all?
Supplements are optional. The basics are progressive overload, enough total protein, enough calories and good sleep. Supplements just make hitting those targets easier — they come after those basics, not instead of them.
Do BCAAs have an authorised health claim?
BCAA is the name for three amino acids: leucine, isoleucine and valine. There is no authorised health claim for BCAAs.
Should I take whey and creatine together?
Many people take both. Whey adds protein toward a daily target, and creatine is a separate supplement. You can mix your creatine into a whey shake.
Sources & further reading
- EU Register of authorised nutrition and health claims (protein, creatine)
- EUR-Lex — Regulation (EU) 432/2012 (list of authorised health claims)
- ISSN Position Stand: protein and exercise (JISSN)
- ISSN Position Stand: creatine supplementation (JISSN)
- Morton et al. — Protein supplementation and resistance training-induced gains in muscle mass and strength (Br J Sports Med, PMC)