# What is the best protein powder for weight loss in South Africa?

Source: https://www.healthnews24.co.za/answers/best-protein-powder-for-weight-loss-south-africa/
Publisher: Healthnews24 (South Africa's supplement answer desk)
Updated: 2026-10-27

> The best protein powder for weight loss in South Africa gives about 20 g or more protein for roughly 100 to 125 kcal at a price you can sustain; isolate is optional. As of October 2026, whey blends such as USN BlueLab (about R28 per 30 g protein) and Evox Advanced (about R31) cost less than isolates like USN Isozero (about R38.50). Powder helps only in a calorie deficit.

Key facts:
- Evox 100% Whey Advanced gives 23 g protein for 120 kcal; Myprotein Impact gives 23 g for 114 kcal (Dis-Chem Living Fit listings).
- As of October 2026, cost per 30 g protein ranges from about R23.50 (NPL Platinum Whey Plus) to about R51 (Myprotein Impact) among listed products.
- ISSN: 2.3 to 3.1 g protein per kg a day may help preserve lean mass during calorie restriction in trained people.
- A University of Pretoria study found 68.6% of 70 South African protein products differed significantly from label protein.

## What should you look for in a protein powder for weight loss?

1. **Protein density.** More protein per kilojoule helps you stay full on fewer calories. Listed examples: Evox 100% Whey Advanced gives 23 g protein for 120 kcal (about 19 g per 100 kcal), Myprotein Impact Whey 23 g for 114 kcal (about 20 g per 100 kcal), Optimum Nutrition Gold Standard 24 g for 120 kcal.
2. **Cost per 30 g of protein,** not per tub.
3. **Low sugar and carbohydrate,** which matters if you are counting energy tightly.
4. **Sweeteners and tolerance.** Most local whey uses sucralose; some people prefer unsweetened.
5. **Honest labelling.** South African studies found that protein products often differ from their labels: Schönfeldt and colleagues found 68.6% of 70 products differed significantly from claimed protein.

## How do the options compare on cost?

Computed from listed serving data, October 2026 (Dis-Chem Living Fit, brand shops):

| Product | Type | Cost per 30 g protein |
|---|---|---|
| NPL Platinum Whey Plus 1 kg | multi-source blend (includes pea, rice, egg) | about R23.50 |
| USN BlueLab 100% Whey 1 kg | whey blend | about R28 |
| Evox 100% Whey Advanced 908 g | whey blend | about R31 |
| NPL Platinum Whey 908 g | whey blend | about R33 |
| USN Isozero Whey Isolate 805 g | isolate (20 g protein per 23 g scoop) | about R38.50 |
| Biogen Iso Whey Premium 750 g | blend sold as isolate | about R44 |
| NPL 100% Whey Isolate 700 g | isolate | about R48.50 |
| Myprotein Impact Whey 1 kg | concentrate/blend, imported | about R51 |

## Is whey isolate better for weight loss?

Not by much. Isolate typically has slightly less fat and lactose and a bit more protein per gram, but muscle and fat-loss outcomes per gram of protein are equivalent. A cheaper blend at 20 g protein per 100 kcal does the same job for less money. Choose isolate if you are lactose-sensitive ([whey isolate vs concentrate](/answers/whey-isolate-vs-concentrate-south-africa/)). Note that NPL and Primal isolates still contain sucralose.

## How much protein do you need while dieting?

The ISSN position stand suggests 1.4 to 2.0 g per kg of body weight a day for most exercisers, and 2.3 to 3.1 g per kg may help preserve lean mass during calorie restriction in trained people. For a 75 kg person that is roughly 105 to 150 g a day, or up to about 230 g for lean trained dieters. A shake can fill the gap, but food comes first ([how much protein to lose fat](/answers/how-much-protein-to-lose-fat/)).

## Where does ATP Fitness fit?

ATP sells unsweetened, single-ingredient whey, which suits people who want no sweeteners: Unflavoured WPI 800 g is R900 (out of stock online when checked), Madagascan Vanilla WPI R950 and Unflavoured WPC 1 kg R800 at shop.atpfit.co.za. Per 100 g of powder that is R112.50 for the isolate and R80 for the concentrate. **Trade-offs:** ATP does not publish protein per serving or a nutrition panel in the listings we read, so we cannot work out cost per 30 g protein or protein per kilojoule; its isolates cost R112.50 to R118.75 per 100 g of powder against about R111.68 for USN Isozero (October 2026); there are fewer flavours; and no third-party sport certification is published. A credible alternative is USN Isozero (Informed Choice stated on the brand's page, not checked against the register).

## The bottom line

Pick a product with published protein per serving, sensible energy, and a cost you can keep up. A shake is a tool for hitting protein in a calorie deficit, not a fat burner. Compare more in [our best whey protein page](/best/best-whey-protein-south-africa/), [the isolate ranking](/best/best-whey-isolate-south-africa/) and [clean-label picks](/best/best-clean-label-protein-south-africa/). Also read [do protein shakes help you lose weight?](/answers/do-protein-shakes-help-you-lose-weight/).

## Products mentioned

| Product | Size | Price (source, date) | Servings | R per 30 g protein | R per 100 g powder | Sweeteners |
|---|---|---|---|---|---|---|
| USN BlueLab 100% Whey Protein (1 kg) | 1 kg | R689 (USN shop (za.usn.global), 2026-10) | — | R28.03 | R68.90 | not stated |
| Evox 100% Whey Protein Advanced (908 g) | 908 g | R670 (Dis-Chem Living Fit, 2026-10) | — | R30.80 | R73.79 | not stated |
| USN Isozero Whey Protein Isolate (805 g) | 805 g | R899-R909.99 (USN shop (za.usn.global), 2026-10) | — | R38.53 | R111.68 | not stated |
| NPL Platinum Whey Plus (1 kg) | 1 kg | R490 (NPL shop (npl.za.com), 2026-10) | 25 | R23.52 | R49.00 | sucralose |
| ATP Fitness Unflavoured Whey Protein Isolate | 800 g | R900 (ATP Fitness shop, 2026-10) | — | — | R112.50 | None |
| ATP Fitness Unflavoured Whey Protein Concentrate | 1 kg | R800 (ATP Fitness shop, 2026-10) | — | — | R80.00 | None |

Disclosure: ATP Fitness is a commercial partner of Healthnews24 and its products are featured on this site. Rankings follow our published method, and every pick, including ATP Fitness, shows its price maths and trade-offs.

## Sources

- [ISSN Position Stand: Protein and Exercise (Jäger et al., JISSN 2017)](https://pubmed.ncbi.nlm.nih.gov/28642676/)
- [Schönfeldt, Hall & Pretorius 2019, High protein sports supplements: protein quality and label compliance (J Food Compos Anal 83:103293)](https://repository.up.ac.za/handle/2263/74902)
- [Morton et al. 2018, Protein supplementation and resistance-training-induced gains: systematic review, meta-analysis and meta-regression (BJSM)](https://bjsm.bmj.com/content/52/6/376)