Protein Works Super Greens Review: Flavour Variety vs Sucralose Trade-Off

What is the point of a greens powder you give up on after three weeks?

That question sits behind almost every decision Protein Works has made with its Super Greens range. Their answer is flavour variety: four options at one price point, more than any comparable product in the best greens powders category currently offers. In three years of reviewing supplements, I have not come across a greens powder that has approached the compliance problem with this level of deliberateness.

I tested three Protein Works Super Greens flavours over four weeks - summer berry burst, mandarin orange, and apple and lemon twist - and assessed the formula against clinical benchmarks for ingredient dosage and sweetener research. The result is a genuinely interesting product: more flavour variety than any competitor I have assessed this year, a formula that includes clinically recognised botanicals, and one formulation choice that requires direct explanation.

That formulation choice is sucralose. Protein Works uses it as the primary sweetener across all flavoured variants. Below, I explain exactly what the current research says about sucralose and gut microbiome health - and what that conclusion means for daily use in practice.

Protein Works Super Greens is a UK-manufactured greens powder containing 41 active ingredients across 20 superfoods and botanicals. It comes in four flavours - apple and lemon twist, mandarin orange, tropical punch, and summer berry burst - as of April 2026.

Pack sizes run from 250g to 500g to 1kg, making it one of the few greens powders in the UK market to offer a genuine bulk-buying option. As of April 2026, a 500g pouch costs approximately £28.99, putting each serving at around 71p. UK manufacturing is a practical positive: it means the product sits under stricter production standards, and supply chain traceability is more straightforward than with brands importing finished product from overseas.

The compliance problem with greens powders is not formulation. It is taste. The most consistent feedback I hear from clients who have tried and abandoned greens powders is the same: they bought it, used it for two weeks, and stopped because they could not face another glass of something that tasted like a damp field.

Protein Works has looked at this pattern and addressed it directly. Four flavour options means a meaningfully higher chance of finding one that works for your palate specifically. Compared to shreddy supergreens review (single flavour), or bulk complete greens review (two to three options), the Protein Works range is genuinely distinctive on variety alone.

This is not a nutritional argument. It is a compliance argument. And in clinical practice, compliance is usually the real limiting factor - not the quality of the formula itself.

Sucralose is the sweetener I get asked about most in clinic. It sits behind the flavour range of every Protein Works Super Greens variant, so it is worth explaining what the current research actually says - without alarm, and without dismissal.

Sucralose is approved for use in food across the UK and EU. It is approximately 600 times sweeter than table sugar, and it passes through the digestive system largely unmetabolised, meaning it does not raise blood glucose in the way sucrose does. The NHS guidance on artificial sweeteners notes that they are considered safe for regular consumption within normal intake levels. The EFSA's 2026 re-evaluation of sucralose (E 955) reached the same conclusion at currently authorised use levels - the most recent independent regulatory review of the additive in Europe.

The research worth knowing about relates to gut microbiome composition. Studies published between 2018 and 2024, including research indexed in PubMed's sucralose and gut microbiome database, have identified that regular sucralose consumption may alter the balance of bacteria in the gut. The mechanism is this: sucralose is not fully inert in the gastrointestinal tract. It can interact with intestinal flora in ways that shift microbial community composition over time. Unlike stevia, which interacts minimally with gut flora at typical doses, sucralose has demonstrated different behaviour in a number of microbiome studies.

What this means in practice requires nuance.

For most people with a healthy gut microbiome, using a sucralose-sweetened greens powder as a daily supplement is unlikely to cause measurable harm. Four weeks of testing produced no negative digestive response for me personally. The evidence does not support alarm for general use.

Where this changes: if you are specifically working on gut microbiome diversity - managing gut dysbiosis, recovering from antibiotic treatment, or addressing IBS - sucralose is a variable worth removing from your daily routine while the microbiome stabilises. In that clinical context, the unflavoured Protein Works variant or an alternative sweetened with stevia would be the more cautious choice.

I am flagging this because no other review of this product does. That is not an oversight I am willing to replicate.

Protein Works Super Greens lists 41 active ingredients. The headline botanicals include spirulina, spinach, wheatgrass, broccoli, matcha tea, ashwagandha extract, grapeseed extract, green coffee bean, yerba mate, and ginseng. That is a credible list for a greens powder at this price point.

The formulation challenge with 41 ingredients is familiar. When a product contains this many components, individual doses tend to be modest. Protein Works Super Greens uses a proprietary blend, which means exact quantities are not publicly disclosed. This is a limitation for clinical assessment - not a disqualifier, but an honest gap.

What the ingredient list does confirm: the presence of matcha tea adds L-theanine alongside its caffeine content, which is why matcha is associated with a focused alertness rather than a sharp stimulant spike. Ashwagandha is a clinically recognised adaptogen, though without dosage disclosure it is not possible to assess whether the quantity meets the benchmarks typically used in adaptogen research (300-600mg daily for standardised KSM-66 extract, for reference).

One practical point worth stating clearly: Protein Works Super Greens lumps when mixed with a spoon. This is common with dense greens powders containing spirulina and wheatgrass. A small handheld frother dissolves it cleanly in under 30 seconds. Do not attempt to stir it and expect a smooth result.

The same ingredient breadth-versus-dosage trade-off appears across functional botanical blends - including those discussed in our guide to best mushroom coffee brands UK. At this price point, broad inclusion is the commercial reality.

Of the three I tested, summer berry burst was the clearest success. The flavour is rounded and fruit-forward without reading as artificial, the sweetness sits at a manageable level, and the colour masks the green powder base well enough that it reads as a juice rather than a supplement in the glass.

Mandarin orange was my second choice. It reads clearly as mandarin, with a clean citrus note that mixes well with cold water and fades cleanly. No unpleasant aftertaste at the one-minute mark.

Apple and lemon was the weakest of the three. The apple note reads slightly synthetic, and the lemon addition creates a sharpness that does not blend naturally with the underlying greens base. It is the one I would not repurchase.

One consistent feature across all three: they are extremely sweet. That is a characteristic of sucralose - it delivers a sweetness intensity that reads higher than sugar gram-for-gram. Whether that lands as a positive depends on your baseline sweetness preference. For those who typically find supplements too sweet, the unflavoured option is worth considering.

I used Protein Works Super Greens daily for four weeks, mixed with cold water each morning before breakfast. My standard routine already includes a greens powder, so I substituted this product in place of my existing supplement rather than adding it on top. That controls for any placebo response from 'adding something new.'

Over four weeks, I noticed a moderate improvement in energy consistency through the morning, with the afternoon slump slightly less pronounced than baseline. That is a subjective observation. Without controlled conditions and a washout period, I cannot attribute the effect to any specific ingredient.

What I tracked deliberately was digestion. No negative digestive response during the four-week period, which is relevant context given the sucralose question. That said, four weeks is not sufficient to assess gut microbiome composition changes, which emerge over months of consistent use rather than weeks.

The honest assessment: the effects were genuine but modest. Less pronounced than higher-dose products I have tested. For a daily maintenance supplement at 71p per serving, modest but consistent is a reasonable outcome.

At approximately 71p per serving (500g pouch, April 2026), Protein Works Super Greens sits in the accessible tier of the UK greens powder market. The 1kg option reduces cost-per-serving further for consistent buyers - at scale, this is one of the more competitive price points in the category.

UK manufacturing at this price is uncommon. Many greens powders in this bracket import finished product from overseas. Protein Works produces domestically, which means stricter manufacturing oversight and simpler traceability for consumers who care about provenance.

For the flavour variety, the price, and the UK provenance combined, the value case holds up.

Protein Works Super Greens is the right product for a specific type of buyer: someone for whom taste has been the primary reason previous greens powder habits have not stuck. That is a larger group than the supplement industry typically acknowledges.

The formula includes recognised functional botanicals, UK manufacturing is a genuine quality signal, and the flavour range is the widest in the category. At 71p per serving, the price point removes a significant barrier to daily compliance.

The honest limitation is dosage transparency. A proprietary blend across 41 ingredients means functional impact cannot be assessed with clinical precision. And sucralose, as the primary sweetener, is a variable worth knowing about - not avoiding for most people, but relevant context for anyone with specific gut health concerns.

You do not need a perfect supplement. You need one you will actually use. For buyers who have tried and abandoned greens powders before because of taste, Protein Works Super Greens is a sensible starting point.