| Factor | Protein Before | Protein After |
|---|---|---|
| Muscle building | Equally effective | Equally effective |
| Research consensus | Total daily intake wins | Total daily intake wins |
| Anabolic window | Myth — window is wide | Myth — window is wide |
| Fasted training | More beneficial | Less benefit |
| Post-fed training | Less needed | Useful for top-up |
| GI comfort | Can cause discomfort | Usually easier |
Choose Protein Before when…
You train early in the morning in a fasted state, have more than 3-4 hours since your last protein-containing meal, or prefer to fuel up before intensity.
Choose Protein After when…
You've eaten a protein-containing meal 1-3 hours before training, don't like training on a full stomach, or prefer to eat after the session.
Gear for both
Whey Protein Powder
Fast-digesting protein for before or after training. The benchmark supplement.
Check price on AmazonProtein Shaker Bottle
Mix protein shakes before or after the gym. Leak-proof and easy to clean.
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FAQ
How long is the 'anabolic window'?
The window for elevated muscle protein synthesis is actually several hours wide — not the 30-minute window popularised by supplement marketing. If you eat adequate protein across the day, exact timing matters little.
How much protein do I need after a workout?
20-40g of a high-quality protein source (whey, eggs, chicken, etc.) is sufficient to maximally stimulate muscle protein synthesis in one sitting. More in a single serving has diminishing returns.
What happens if I do not eat protein after training?
Missing post-workout protein does not cause muscle loss in the context of adequate daily protein intake. The muscle protein synthesis response to training remains elevated for 24–48 hours — you have a wide window, not just 30 minutes. However, consuming protein within 2–3 hours of training is still worth prioritising for convenience and to ensure the total daily target is met. Missing the post-workout window occasionally has negligible practical impact.