Health, fitness and the supplement aisle. An independent South African desk.
Protein · Answer
For most buyers in South Africa, USN BlueLab 100% Whey is the better buy than Optimum Nutrition Gold Standard: about R28 versus about R47 per 30 g protein (R689 per kg against R1 150 for 900 g, October 2026). Choose Optimum Nutrition if you specifically want that imported product and flavour range and will verify authenticity.
This is a global brand versus a local one. We compare price, availability and authenticity on verifiable data. Prices are October 2026.
| Optimum Nutrition Gold Standard 100% Whey | USN BlueLab 100% Whey | |
|---|---|---|
| Origin | United States (imported) | South Africa |
| Size and price | 900 g, R1 150 (Dis-Chem Living Fit); 2.28 kg, R2 499.99 | 1 kg, R689 (USN shop); 2 kg, R1 399 |
| Price per kg | about R1 278 | R689 |
| Protein per serving | 24 g per rounded scoop (29.4 g on ON's UK site; not printed on the Dis-Chem listing) | 23.6 g per 32 g scoop |
| R per 30 g protein | about R47 (using the 29.4 g UK scoop weight) | about R28 |
| Flavours | 7 listed at Dis-Chem Living Fit | 15 stated |
| Certification stated | none on the listing we saw | Informed Choice and batch testing stated on USN's page; register not checked |
| Whey type | not stated in the listing | blend described as 100% whey |
So Optimum Nutrition costs about 1.7 times more per 30 g protein, or roughly 86% more per kilogram.
Not in protein terms. Per gram, the muscle result depends on total daily protein, not brand (ISSN). The premium pays for an internationally known product, a particular taste profile and a global distribution record. Flavour is subjective; we do not rank taste (best-tasting whey).
Optimum Nutrition is sold at Dis-Chem Living Fit and Takealot. USN is sold on its own shop, at Dis-Chem, Clicks and Takealot, so it is easier to compare prices across retailers.
Imported products sold through marketplaces carry a higher counterfeit risk than a local brand sold in its own shop, which is why Optimum Nutrition publishes authentication guidance (batch code, rim seal, dates two years apart). Buying from Dis-Chem or Takealot "sold by Takealot" lowers that risk. See is Optimum Nutrition original and how to spot fake whey.
Read the full best whey protein comparison.
Whey is milk protein. If you have a milk allergy or kidney disease, or are under 18, speak to a doctor or dietitian first.
| Product | Size | Price (source, date) | Servings | R per 100 g powder | R per 30 g protein | Sweeteners |
|---|---|---|---|---|---|---|
| Optimum Nutrition Gold Standard 100% Whey (900 g) | 900 g | R1 150 (Dis-Chem Living Fit, 2026-10) | — | R127.78 | — | not stated |
| USN BlueLab 100% Whey Protein (1 kg) | 1 kg | R689 (USN shop (za.usn.global), 2026-10) | — | R68.90 | R28.03 | not stated |
| USN Isozero Whey Protein Isolate (805 g) | 805 g | R899-R909.99 (USN shop (za.usn.global), 2026-10) | — | R111.68 | R38.53 | not stated |
| ATP Fitness Madagascan Vanilla Whey Protein Isolate | 800 g | R950 (ATP Fitness shop, 2026-10) | — | R118.75 | — | None |
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.