Benefits
Protein digestion enhancement via actinidin
Actinidin is a cysteine protease enzyme that breaks down proteins in the stomach and small intestine, converting them into more digestible peptides. KWD+ contains ~5× the actinidin concentration of fresh kiwi. Animal model and bench studies support actinidin's ability to improve digestion of hard-to-digest proteins including gluten, soy protein, and beef muscle.
Vegetarian and vegan protein utilization
Plant proteins typically have lower bioavailability than animal proteins. KWD+ helps vegetarians and vegans increase the biological value of vegetable proteins — getting more nutritional benefit from the same protein intake. Practical relevance for the growing plant-based diet population concerned about protein adequacy.
Sports nutrition protein efficiency
For sport professionals and athletes, KWD+ supports better harnessing of proteins — potentially enhancing the amino acid availability needed for muscle protein synthesis and recovery. Doping-free certification makes it suitable for competitive athletes subject to WADA-style testing protocols.
Elderly digestion support
Protein digestion efficiency declines with age due to reduced gastric acid secretion (hypochlorhydria) and lower endogenous proteolytic enzyme production. KWD+ provides supplemental actinidin enzyme activity to support the elderly population's protein utilization — relevant for preserving lean muscle mass during aging.
Gentle gastrointestinal motility
Kiwi fruit is well-established for supporting gut motility — kiwi consumption is one of the few dietary interventions with controlled trial evidence for constipation relief. KWD+ provides concentrated kiwi bioactives in a small capsule, supporting motility without the calorie and FODMAP load of whole kiwi fruit.
Reduced digestive discomfort
KWD+ helps prevent discomforts during digestion such as bloating, fullness, and pain. The dual mechanism — actinidin breaking down proteins more efficiently plus Aktinnamics® reducing inflammatory signaling — addresses both mechanical and inflammatory components of post-meal digestive discomfort.
TNF-α anti-inflammatory activity
The Aktinnamics® phenolic complex has documented inhibitory action on pro-inflammatory mediators including TNF-α (tumor necrosis factor-alpha). Reducing pro-inflammatory signaling in the gut supports overall digestive comfort beyond simple enzymatic protein breakdown. Mechanism documented in vitro and in vivo preclinical research.
Mechanism of action
Actinidin cysteine protease activity
Actinidin is a cysteine protease enzyme — structurally and functionally similar to bromelain (from pineapple) and papain (from papaya). It catalyzes peptide bond hydrolysis in proteins, breaking them down into smaller peptides that are more easily absorbed by the small intestine. Active across a broad pH range, allowing function in both stomach and intestine.
5-fold actinidin concentration
Pharmactive's proprietary extraction technology concentrates proteolytic enzymes ~5× the level found in fresh kiwi fruit. This concentration matters because the protein-digesting effect requires meaningful enzyme presence at the time of protein consumption — achievable practically only through extract concentration rather than eating multiple whole kiwi fruits with each meal.
Aktinnamics® phenolic anti-inflammatory activity
Aktinnamics® is the proprietary name for KWD+'s characteristic phenolic compound complex — antioxidants chiefly responsible for the anti-inflammatory effects. Documented in vitro and in vivo as inhibiting pro-inflammatory mediators including TNF-α. Supports gut function beyond pure protein digestion effects.
Gut motility support
Kiwi fruit's effects on gut motility are well-documented from whole-fruit clinical trials (notably for constipation in functional GI disorders). The exact molecular mechanism is multi-factorial — including fiber content, actinidin's effects on intestinal contents, and possibly serotonergic effects on enteric nervous system. KWD+ preserves these benefits in concentrated form.
Clinical trials
Animal models and bench (in vitro) studies examining actinidin's ability to improve digestion of various proteins in the stomach and small intestine. Test proteins included challenging-to-digest classes: gluten, soy protein, and beef muscle. Foundation for KWD+'s commercial positioning across sports, vegan, and elderly populations.
Not applicable — animal model and in vitro bench studies.
Actinidin from KWD+ effectively breaks down challenging proteins (gluten, soy, beef muscle) into more digestible peptide fractions in stomach and small intestine conditions. 5-fold enzyme concentration vs fresh kiwi maintains physiologically relevant activity at supplemental doses. Supports the three target population use cases.
Multiple controlled trials of whole kiwi fruit consumption (typically 2 green kiwifruit/day) for constipation and functional gastrointestinal disorders. Published in journals including Alimentary Pharmacology & Therapeutics. Provides class-evidence foundation for KWD+'s motility positioning, since the concentrated extract preserves the same bioactive classes.
Adults with constipation and functional GI disorders across multiple trials.
Whole kiwi fruit consumption (2 green kiwifruit/day) improved bowel movement frequency, stool consistency, and reduced straining vs control in controlled trials. Effect emerged within days to weeks of consistent use. KWD+ preserves the kiwi bioactive profile in concentrated form, supporting similar motility effects at smaller volumes than eating whole kiwi fruits daily.
In vitro and in vivo studies characterizing the Aktinnamics® phenolic complex's anti-inflammatory mechanism. Tested effects on pro-inflammatory cytokines including TNF-α and broader inflammatory signaling pathways. Provides mechanistic basis for the gut comfort and motility effects beyond pure protein digestion.
Not applicable — in vitro and in vivo mechanism studies.
Aktinnamics® inhibited pro-inflammatory mediators including TNF-α in vitro. In vivo studies confirmed anti-inflammatory activity. The mechanism supports the broader gut comfort positioning — bloating and discomfort have inflammatory components alongside mechanical factors. Differentiates KWD+ from pure enzyme supplements (bromelain, papain) that lack the antioxidant/anti-inflammatory bioactive class.