My take on STC Nutrition: whey powders can fill a protein gap, and gels can provide carbohydrates during exercise that warrants them. A range name is not enough to make your choice. At the recorded prices, Premium Whey costs less per quantity of protein than Pure Whey, despite the more expensive bag. For gels, the flavour sometimes changes the nutrient content.
The main reservation concerns documentation: several products are unavailable, conflicting figures are given for Boost’s caffeine content, and no batch analysis report is accessible from the pages examined. These are specific limitations of this audit, not a judgement on every product from the brand.
Scope: a document-based review, without hands-on testing
Formulas and prices recorded on 17 October 2026, directly from the manufacturer’s French product pages: unflavoured Pure Whey, Premium Whey and three Over Blast gels. The tables compare declared content, without independent analysis of the contents. Prices include VAT, exclude delivery and involve no personal discount code or subscription.
I have not tasted these products, measured how well they dissolve or tested their tolerability during a race. Customer testimonials therefore do not become my own observations. No numerical ranking or affiliate link has been added to this review.
Discounts visible in search results and cached pages sometimes differed from the directly downloaded page. I use the latter for calculations. The “crossed-out price” is the one displayed by the seller: I have not checked its history. A promotion recorded for an unavailable product is not a guaranteed purchasable offer.
Two units make the comparison reproducible: 25 g of protein for powders, 30 g of carbohydrate for gels. These are accounting benchmarks, not consumption recommendations.
Whey: compare the protein, not the bag price
Whey is a milk-derived protein. It provides amino acids involved in tissue renewal. Its usefulness depends on what your meals already provide, alongside training suited to your goal.
The meta-analysis by Morton and colleagues, whose text was consulted via Europe PMC, brings together 49 studies and 1,863 healthy adult participants, with at least six weeks of resistance training. It observes an average benefit of protein supplementation on training adaptations. It does not compare these two STC products or demonstrate any brand superiority. Baseline intake, age and experience affect the results. One co-author declares funding and fees from the US National Dairy Council, which supported some of the included trials: this competing interest must remain visible.
Table of the two powders
Both product pages declare 20 g of protein per 25 g of powder, or 80 g per 100 g. Here is the cost calculated from that declaration:
| Product and pack size | Protein per 25 g serving | Crossed-out price / recorded promotion | Cost per 25 g of protein, crossed-out / promotion | Displayed availability |
|---|---|---|---|---|
| Unflavoured Pure Whey, 500 g | 20 g | €29.90 / €22.43 | €1.87 / €1.40 | “Back soon” |
| Premium Whey, 750 g | 20 g, table shared across flavours | €39.90 / €31.92 | €1.66 / €1.33 | Add-to-basket option available, variant to be confirmed |
Formula: cost = pack price × 25 ÷ total protein in the pack. For Pure Whey, 500 × 0.80 = 400 g of declared protein. So 22.43 × 25 ÷ 400 = €1.40 after rounding. For Premium, 750 × 0.80 = 600 g, then 31.92 × 25 ÷ 600 = €1.33.
You therefore need 31.25 g of powder at 80% protein to obtain the accounting unit of 25 g of protein. The manufacturer’s shake serving of 25 g of powder provides 20 g. Confusing the two artificially lowers the displayed cost. The calculation excludes any added milk: its protein and price belong on a separate line.
Unflavoured or enriched formula: the useful difference
Pure Whey has a short ingredient list: whey concentrate, sunflower lecithin and calcium phosphate. No sweetener is listed. From a documentation standpoint, its appeal is this simplicity, without attributing better muscle-building effectiveness to it.
Premium combines concentrate, isolate and hydrolysate, enzymes and fibres under the Aminolise name, plus sweeteners. The list mentions milk and soya. The shared table does not allow a fully separate nutritional audit of each flavour: check the values against your bag.
The presence of enzymes does not guarantee that you will digest the product better. The page provides no clinical trial of the finished product that would quantify this benefit. A patent filing documents an intellectual property process, not, by itself, a proven digestive benefit. A longer formula does not automatically offer more value.
To compare other brands using the same unit, use the comparison of whey powders and their protein cost. Recalculate using current prices rather than mixing promotions recorded on different dates.
Gels: carbohydrates, caffeine and sodium affect the choice
A gel serves a different purpose: carrying a concentrated carbohydrate source you can consume during exercise. It is not a mini whey shake, and it is not a substitute for water. Its usefulness depends, among other things, on exercise duration, your planned intake and your digestive tolerance.
Cost for a comparable amount of carbohydrate
Each box contains ten 25 g sachets. The following values apply only to the specified flavours, based on their official tables:
| Gel and flavour | Carbohydrate / sodium per sachet | Declared caffeine | Crossed-out price / promotion for ten | Cost per 30 g of carbohydrate, crossed-out / promotion |
|---|---|---|---|---|
| Over Blast No Cramp red berry | 16 g / 34 mg | Not quantified, no caffeine source listed | €21.00 / €17.43 | €3.94 / €3.27 |
| Over Blast Boost red berry | 19 g / 52 mg | 32 mg per sachet in the table | €22.00 / €20.90 | €3.47 / €3.30 |
| Over Blast BCAA mint | 14 g / 46 mg | Not quantified despite the guarana | €23.70 / €20.86 | €5.08 / €4.47 |
No Cramp is listed as “Back soon”. Boost indicates availability depending on the option selected. These prices are used to compare product pages, without guaranteeing that every variant can be purchased.
Formula: cost = box price ÷ 10 × 30 ÷ carbohydrate per sachet. For BCAA: 20.86 ÷ 10 × 30 ÷ 14 = €4.47. The result mathematically equates to around 2.14 sachets, without recommending splitting sachets or consuming this amount each time.
This table measures neither digestive comfort, performance nor ease of opening. It shows what you pay for the declared carbohydrates. A higher price may reflect a practical preference, but you still need to test that preference yourself in training.
Three checks before filling your pockets
Caffeine must be counted separately. Boost lists 32 mg per sachet in its table, while another passage states a maximum of 180 mg for six sachets. Yet 6 × 32 = 192 mg. I use the table to describe the declared content, while requesting confirmation on current packaging. For BCAA, the presence of guarana means you cannot conclude “caffeine-free” without a published quantity.
EFSA notes that caffeine from all sources adds up and that 100 mg close to bedtime may disrupt sleep in some adults. This figure is not a threshold guaranteeing no effect below it. Coffee, drinks and other supplements must be included in the total.
Sodium must stay in its own unit. The figures in the table are the declared sodium values, not to be confused with grams of salt. They are not enough to define an individual hydration strategy. The amount you drink and other foods or drinks matter too.
A gel’s name is not a clinical result. No Cramp does not, by its name alone, demonstrate cramp prevention. BCAA declares 500 mg of branched-chain amino acids per sachet, but their presence does not prove better recovery. I award no effectiveness bonus for these names.
Claims and analyses: what is missing before we can conclude
An amino acid profile describes a declared composition. An identifiable analytical report documents a sample, methods and results. An anti-doping compliance statement does not replace that report or guarantee zero risk.
Across the five pages examined, I found no analytical report linked to a batch number. This observation does not prove that STC performs no testing. It means I cannot publicly verify the results for the batch you will buy.
Another concrete limitation: the Boost text repeats an old urinary threshold for caffeine. The WADA 2026 Monitoring Program classifies it among substances monitored in competition, without placing it on the Prohibited List. The marketing passage is therefore not a current regulatory reference.
Before a purchase where traceability particularly matters, request the following:
- The exact identification of the product, flavour and batch covered by the document.
- The laboratory, date, methods and results for the parameters tested.
- The scope of any certification, its validity and the products covered.
- A quantified answer on caffeine when caffeinated extracts are included in the formula.
No response leaves uncertainty. It justifies neither inventing a certificate nor accusing the brand of contamination. Pharmacy sales make it easier to discuss the product with a professional, without turning every label promise into clinical evidence.
Who might buy these, and when to add nothing
A whey powder can be practical if your meals leave an identified gap and you tolerate its ingredients. The guide to daily protein needs helps you ask that question before choosing a bag. If your needs are already met, adding a powder is not an obligation just because you exercise.
A gel can address a fuelling constraint during prolonged exercise. A routine short outing does not automatically justify an enriched range. Also compare a drink or portable food, depending on the context. Do not experiment with a new formula on competition day.
The Pill Cupboard is the accumulation of supplements without knowing which one does what. To avoid it here, write down the need before the product name: a measured protein gap or a planned carbohydrate intake. A smaller basket may be the best outcome of the comparison.
Tolerance and situations requiring advice
These whey powders contain milk: they are unsuitable for anyone with a milk protein allergy. Lactose intolerance is different, but the pages examined do not provide a sufficiently precise residual lactose content to guarantee your tolerance. Enzymes do not remove an allergen.
ANSES recommends an assessment with a healthcare professional before taking sports supplements, and advises against combining supplements with one another or with medicines. Its bulletin also advises against caffeinated supplements before and during exercise. This general recommendation is not a warning specifically targeting STC.
Consult a doctor or pharmacist before buying if you take medication, have kidney, liver or cardiovascular disease, are pregnant or breastfeeding, or are under 18. If symptoms persist, do not use a supplement to avoid a medical assessment. Stop taking the product if you have an unusual reaction and seek advice. Difficulty breathing, facial swelling, chest pain or feeling seriously unwell require urgent help: call 15 or 112 in France.
