KTropix Klean Protein Shot

Protein shots are not a new idea. What is new is building one around beta-lactoglobulin -- the most leucine-dense fraction of whey protein -- and packing 24g of it into a 3.4oz bottle with zero sugar, zero carbs, zero fat, and 90 calories. That's the pitch from KTropix Klean Protein Shot, the flagship product of K Tropix Wellness, the mainstream supplement arm of K-Tropix, a Boise, Idaho-based brand with roughly five years in the botanical space.

The product comes in two SKUs: Mixed Berries (no caffeine) and Watermelon (50mg caffeine from green tea). Both use the same ProFerm® 1000 fermented BLG base, the same OliveGuard® polyphenol-plus-fiber add-on, and the same clean excipient stack. The Watermelon variant adds a mild functional edge. If you've been skeptical about protein shots -- too thick, too sweet, too obviously engineered -- this one is worth a closer look before you write off the format.

Klean Protein Shot Nutrition Facts

• Calories: 90
• Total Fat: 0g
• Total Carbohydrate: 0g
• Total Sugars: 0g
• Protein: 24g
• Sodium: 140mg

The Watermelon variant adds 50mg caffeine from green tea. All other macros are identical across both flavors.

Klean Protein Shot Ingredients

Each 3.4oz (107g) bottle provides the following:

• ProFerm® 1000 Whey Protein Isolate (Fermented Beta-Lactoglobulin) - 26.5g

  Beta-lactoglobulin (BLG) is the dominant protein fraction in bovine whey, accounting for roughly 50-65% of total whey proteins. What makes it interesting isn't just that it's high quality -- it carries significantly more leucine per gram than standard whey protein isolate. BLG delivers approximately 15-16% leucine by weight, compared to around 10-12% for conventional WPI.^[1,2] That gap matters because leucine is the primary nutritional trigger for mTORC1, the signaling pathway that kicks off muscle protein synthesis. More leucine per gram means you can drive a robust anabolic response from a smaller serving volume, which is the whole logic behind a 3.4oz shot format.

  K Tropix sources their BLG through ProFerm® 1000, a precision-fermented whey protein isolate that removes over 95% of trace lactose. A 2025 crossover study found that approximately 10g of BLG produced significantly greater peak plasma leucine and BCAA availability compared to an equal-nitrogen WPI dose, with both supplements stimulating muscle protein synthesis by around 52-58% in fed and fed-plus-exercise conditions.^[1] An 8-week resistance training trial using fermentation-derived BLG found muscle adaptation outcomes equivalent to conventional dairy whey.^[3] The 26.5g serving here delivers well above the leucine threshold associated with robust mTORC1 activation in healthy adults.^[1,4]

  BLG also triggers a stronger insulin response than standard WPI, which supports amino acid uptake into muscle tissue after training.^[5]

• OliveGuard® (Extra Virgin Olive Oil & Fiber) - 20mg

  

  OliveGuard® is a proprietary ingredient that encapsulates extra virgin olive oil (EVOO) in an acacia fiber matrix, converting the liquid oil into a shelf-stable, water-dispersible powder. It's a two-part system: the EVOO contributes polyphenols -- primarily hydroxytyrosol, tyrosol, and oleocanthal -- and the acacia fiber acts as both the delivery vehicle and a prebiotic component.

  The polyphenol side has a credible research backing. In a large crossover trial with 200 healthy men, olive oil with higher polyphenol content significantly increased HDL cholesterol and reduced oxidized LDL in a dose-dependent fashion, while low-polyphenol oils produced opposite effects on LDL oxidation.^[6] Oleocanthal, the compound responsible for the peppery sensation in high-quality EVOO, inhibits the same COX-1 and COX-2 enzymes as ibuprofen, though at substantially lower concentrations than a pain-relief dose.^[7]

  The acacia fiber component has its own clinical data. A 4-week RCT in IBS-C patients found 10g/day acacia fiber significantly increased stool frequency compared to placebo.^[8]

  At 20mg, OliveGuard is a complementary addition rather than a primary therapeutic dose. You're getting the polyphenols and a trace prebiotic contribution, not a meaningful fiber serving. Think of it as a clean bonus rather than the main event.

• Caffeine (from Green Tea) - 50mg (Watermelon SKU only)

  

  Caffeine at 50mg is a light functional dose, roughly half a cup of coffee. K Tropix sources it from green tea, which carries the same mechanism as any caffeine source: blocking adenosine receptors in the brain to keep the tiredness signal from going through.^[9] At this dose, research shows consistent benefits on vigilance and sustained attention with minimal jitteriness or sleep disruption risk for most people.^[10]

  This isn't a pre-workout dose. It's closer to what you'd add to a functional beverage for a mild energy edge -- appropriate for mid-morning or early afternoon without worrying about it keeping you up at night. For those who want protein without any stimulant, the Mixed Berries SKU skips it entirely.

• Other Ingredients

  • Purified Water - the primary liquid base of the shot.
  • Natural Flavors - used to deliver the berry and watermelon profiles without added sugar or artificial color. Derived from biological sources and evaluated for safety under the FEMA GRAS program.
  • Phosphoric Acid - a food-grade acidulant that lowers the pH of the shot, contributing tartness and helping preserve freshness. Worth noting that phosphoric acid-containing beverages tend to run acidic, which is a consideration for frequent consumption and dental health.^[11]
  • Malic Acid - a naturally occurring fruit acid that adds sour and tart notes to balance the sweetener and protein base. A TCA cycle intermediate with a well-established safety profile as a food additive.
  • Potassium Sorbate - a standard antimicrobial preservative that inhibits yeast and mold, keeping the shot shelf-stable at room temperature. EFSA has established an ADI of 11mg/kg body weight per day with a 100-fold safety margin; realistic dietary exposure for most people falls well below that threshold.^[12]
  • Sucralose - a zero-calorie sweetener used to maintain palatability without adding sugar or carbohydrates. Globally approved and used here at food-relevant levels.^[13]
  • Sodium Benzoate - a second preservative working alongside potassium sorbate, effective against bacteria in acidic aqueous environments. Standard dual-preservative approach for ambient-stable protein shots. EFSA has established a group ADI of 0-5mg/kg body weight per day.^[14]

Flavors Available

• Mixed Berry (Caffeine-Free) (12 Shots: $57.50)
• Watermelon (Caffeinated) (12 Shots: $67.50)

Who It's For

• High-protein dieters without shaker access: Anyone hitting aggressive protein targets on the road, at the office, or in transit who doesn't want to deal with powder or a 20oz RTD bottle. TSA-approved, no refrigeration needed, fits in a jacket pocket.
• GLP-1 medication users and smaller appetites: BLG's leucine density means 24g of protein with a meaningful anabolic stimulus in under 100 calories -- relevant if you're eating significantly less and need each meal to count.

The Verdict: A Protein Shot That Actually Earns It

Most protein shots are a compromise: lower protein, cheaper base, flavors that fight you. Klean Protein takes a more considered approach, building around BLG's genuine leucine advantage and a precision fermentation process that makes the format practical. The 26.5g of ProFerm® 1000 delivers well above what's needed to support muscle protein synthesis, OliveGuard is a thoughtful add-on rather than label dressing, and the dual-SKU setup covers the obvious use cases without overcomplicating the line.

If you're serious about protein intake, travel regularly, or just want a clean 90-calorie hit of high-quality whey that fits in your pocket, the Klean Protein Shot is worth the price of entry.

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References

1. Ely, Isabel A, et al. "The Effect of Leucine-Enriched β-Lactoglobulin Versus an Isonitrogenous Whey Protein Isolate on Skeletal Muscle Protein Anabolism in Young Healthy Males." Nutrients, 2025. https://doi.org/10.3390/nu17213410
2. Ely, Isabel A, et al. "A focus on leucine in the nutritional regulation of human skeletal muscle metabolism in ageing, exercise and unloading states." Clinical nutrition (Edinburgh, Scotland), 2023. https://doi.org/10.1016/j.clnu.2023.08.010
3. Rogers, Lucy M, et al. "Postprandial Bioavailability and Efficacy of Recombinant Bovine β-Lactoglobulin for Resistance Training-Induced Skeletal Muscle Adaptation in Young Adults." Medicine and science in sports and exercise, 2025. https://doi.org/10.1249/MSS.0000000000003756
4. Witard, Oliver C, et al. "Myofibrillar muscle protein synthesis rates subsequent to a meal in response to increasing doses of whey protein at rest and after resistance exercise." The American journal of clinical nutrition, 2014. https://doi.org/10.3945/ajcn.112.055517
5. Mose, Maike, et al. "β-Lactoglobulin Is Insulinotropic Compared with Casein and Whey Protein Ingestion during Catabolic Conditions in Men in a Double-Blinded Randomized Crossover Trial." The Journal of nutrition, 2021. https://doi.org/10.1093/jn/nxab010
6. Covas, María-Isabel, et al. "The effect of polyphenols in olive oil on heart disease risk factors: a randomized trial." Annals of internal medicine, 2006. https://doi.org/10.7326/0003-4819-145-5-200609050-00006
7. Parkinson, Lisa, et al. "Oleocanthal, a phenolic derived from virgin olive oil: a review of the beneficial effects on inflammatory disease." International journal of molecular sciences, 2014. https://doi.org/10.3390/ijms150712323
8. JanssenDuijghuijsen, Lonneke, et al. "Acacia fiber or probiotic supplements to relieve gastrointestinal complaints in patients with constipation-predominant IBS: a 4-week randomized double-blinded placebo-controlled intervention trial." European journal of nutrition, 2024. https://doi.org/10.1007/s00394-024-03398-8
9. Guest, Nanci S. et al. "International Society Of Sports Nutrition Position Stand Caffeine And Exercise Performance." Journal of the International Society of Sports Nutrition, 2021. https://doi.org/10.1186/s12970-020-00383-4
10. McLellan, Tom M. et al. "A Review Of Caffeine S Effects On Cognitive Physical And Occupational Performance." Neuroscience & Biobehavioral Reviews, 2016. https://doi.org/10.1016/j.neubiorev.2016.09.001
11. Reddy, Avanija, et al. "The pH of beverages in the United States." Journal of the American Dental Association (1939), 2016. https://doi.org/10.1016/j.adaj.2015.10.019
12. et al. "Opinion on the follow-up of the re-evaluation of sorbic acid (E200) and potassium sorbate (E202) as food additives." EFSA journal. European Food Safety Authority, 2019. https://doi.org/10.2903/j.efsa.2019.5625
13. et al. "Re-evaluation of sucralose (E 955) as a food additive and evaluation of a new application on extension of use of sucralose (E 955) in fine bakery wares." EFSA journal. European Food Safety Authority, 2026. https://doi.org/10.2903/j.efsa.2026.9854
14. EFSA, Panel on Food Additives and Nutrient Sources (ANS). "Scientific Opinion on the re‐evaluation of benzoic acid (E 210), sodium benzoate (E 211), potassium benzoate (E 212) and calcium benzoate (E 213) as food additives." EFSA Journal, 2016. https://doi.org/10.2903/j.efsa.2016.4433