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Protein · Answer
In South Africa as elsewhere, take whey whenever it helps you reach your daily protein target: total daily intake matters far more than timing. Aim for 20–40 g per serving across 3–5 meals about 3–4 hours apart, with one serving within a few hours of training. The 30-minute anabolic window is overstated; 30–40 g of casein before bed is optional.
Whenever it fits your day and fills a protein gap. The ISSN's nutrient-timing position stand concludes that total daily protein is the main driver of muscle gain, with distribution across meals a secondary refinement. For most South African lifters, the "best" time is the one you will repeat.
The window is much wider than 30 minutes, especially if you ate protein in the hours before training. Trommelen and colleagues (2023) found 100 g of milk protein after exercise produced a longer anabolic response over 12 hours than 25 g, which also undercuts the idea that the body can use only 20–30 g at once. A shake straight after training is convenient, not magic.
Schoenfeld and Aragon (2018) suggest about 0.4 g per kg per meal across at least four meals to reach 1.6 g/kg a day; the ISSN gives about 0.25 g/kg (roughly 20–40 g) every 3–4 hours.
| Situation | Practical timing |
|---|---|
| Morning training, fasted or light breakfast | A shake within 1–2 hours after, with carbohydrate if you train hard again |
| Lunch-time or after-work training | One serving within a few hours either side; main meal as normal |
| Evening training | Post-session serving, then optional 30–40 g casein before bed |
| Cutting | Spread 25–40 g across 4 meals; powder helps with fullness |
| Older adults (anabolic resistance) | Aim for the higher end of 30–40 g per meal |
| Endurance (long run or ride) | Whey with carbohydrate after; protein supports recovery |
For example, a 75 kg lifter aiming at 1.6 g/kg needs 120 g: four meals of 30 g. One scoop of whey at roughly 23 g of protein can be one of those feeds.
Pre-sleep protein is optional. The ISSN says 30–40 g of casein before sleep raises overnight muscle protein synthesis and does not impair fat burning. Whey works too; casein just digests more slowly. See casein vs whey.
At October 2026 prices a serving of whey costs roughly R12–R39 depending on brand (per 30 g protein comparison), so one shake a day can be sufficient if the rest comes from food. Check how much protein per day and how much protein to build muscle, and see the best whey protein in South Africa for a tub.
If you have kidney disease, are pregnant or under 18, or take medicine, ask a doctor or dietitian before raising protein intake.
Educational information, not medical advice. Speak to a doctor, pharmacist or registered dietitian before using supplements if you are pregnant or breastfeeding, under 18, taking medication, or living with kidney, liver or heart disease. Prices were observed in October 2026 and are not offers.