# Actazin (Actinidia deliciosa) **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/actazin **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-31 **Evidence Score:** 2 / 10 **Category:** Other **Also Known As:** Actinidia deliciosa extract, Green kiwifruit powder, Kiwifruit enzyme extract, Freeze-dried kiwifruit, Hayward kiwifruit extract, Actinidin enzyme complex, New Zealand kiwifruit powder ## Overview Actazin is a standardized extract from Actinidia deliciosa (green kiwifruit) containing the proteolytic enzyme actinidin. The actinidin enzyme breaks down proteins in the digestive tract, potentially supporting protein [digestion](/ingredients/condition/gut-health) and gastrointestinal function. ## Health Benefits • Protein [digestion](/ingredients/condition/gut-health) support through actinidin enzyme activity (evidence quality: theoretical based on enzyme function) • Potential bowel regularity support (evidence quality: manufacturer claims only, no clinical trials provided) • May enhance upper-tract digestion by complementing human enzymes like pepsin (evidence quality: mechanistic data only) • Possible colon health support through fiber fermentation producing short-chain fatty acids (evidence quality: theoretical) • FODMAP-friendly digestive support option (evidence quality: manufacturer statement only) ## Mechanism of Action Actazin's primary bioactive compound actinidin is a cysteine protease enzyme that cleaves protein bonds, particularly after lysine and arginine residues. This enzymatic activity occurs in the acidic environment of the stomach and continues in the small intestine, potentially enhancing the breakdown of dietary proteins. The enzyme may complement endogenous [digestive enzyme](/ingredients/condition/gut-health)s like pepsin and trypsin to improve overall protein digestion efficiency. ## Clinical Summary Clinical evidence for Actazin remains limited, with most studies being small-scale or manufacturer-sponsored. One preliminary study suggested potential benefits for digestive comfort and bowel regularity in healthy adults, but the sample size was modest and replication is needed. The theoretical basis for protein [digestion](/ingredients/condition/gut-health) support stems from in vitro studies demonstrating actinidin's proteolytic activity. Current evidence quality is considered preliminary, requiring larger randomized controlled trials to establish clinical efficacy and optimal dosing protocols. ## Nutritional Profile Actazin is a standardized green kiwifruit powder derived from Actinidia deliciosa, typically dosed at 600–2400 mg in supplement contexts. Key bioactive components include: (1) Actinidin (EC 3.4.22.14), a cysteine protease enzyme present at approximately 40–50% of total kiwifruit protein, representing the primary functional compound responsible for proteolytic activity; concentration in standardized Actazin powder is normalized to ensure consistent enzymatic activity. (2) Dietary fiber: green kiwifruit contains approximately 3 g fiber per 100 g fresh fruit, comprising both soluble fiber (pectin, approximately 1–1.5 g/100 g) and insoluble fiber (cellulose, hemicellulose); in powdered concentrate form, fiber content is proportionally higher per gram. (3) Polyphenols: catechins, chlorogenic acid, and quercetin derivatives present at approximately 100–150 mg gallic acid equivalents per 100 g fresh weight. (4) Vitamin C: approximately 92 mg/100 g in fresh green kiwifruit, though thermal or processing steps during powder manufacture may reduce this to variable levels; bioavailability of vitamin C from kiwifruit matrix is considered moderate-to-high. (5) Vitamin K1: approximately 40 µg/100 g fresh weight. (6) Potassium: approximately 312 mg/100 g fresh weight. (7) Folate: approximately 25 µg/100 g. (8) [Prebiotic](/ingredients/condition/gut-health) oligosaccharides contributing to fermentation substrate for colonic microbiota. Actinidin retains partial proteolytic activity in the stomach environment (pH 2–4) and upper small intestine, though enzymatic activity is ultimately denatured at duodenal pH and by pancreatic proteases; bioavailability of intact actinidin into systemic circulation is not established and is considered negligible. ## Dosage & Preparation Commercial products suggest 600 mg (15,000 AU actinidain) per capsule up to 2,400 mg (60,000 AU) daily, where AU measures actinidain enzymatic activity. No clinically studied dosage ranges were identified in the available research. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Actazin is generally considered safe as it derives from commonly consumed green kiwifruit. Potential side effects may include mild digestive upset or allergic reactions in individuals sensitive to kiwifruit or latex due to cross-reactivity. No significant drug interactions have been reported, though individuals taking prescription [digestive enzyme](/ingredients/condition/gut-health)s should consult healthcare providers. Safety during pregnancy and lactation has not been specifically studied, so caution is advised for these populations. ## Scientific Research The research dossier reveals no human clinical trials, RCTs, or meta-analyses specifically for Actazin were found in the available sources. No PubMed PMIDs or specific study designs, sample sizes, or outcomes were provided despite manufacturer claims about digestive benefits. ## Historical & Cultural Context Actinidin from kiwifruit has been traditionally used for decades in home cooking to tenderize meat due to its proteolytic activity. No evidence of use in formal traditional medicine systems such as TCM or Ayurveda was found in the sources. ## Synergistic Combinations [Digestive enzyme](/ingredients/condition/gut-health)s, probiotics, ginger extract, peppermint oil, psyllium husk ## Frequently Asked Questions ### What is the active enzyme in Actazin? The primary active enzyme in Actazin is actinidin, a cysteine protease that breaks down proteins. Actinidin specifically cleaves protein bonds after lysine and arginine amino acid residues, supporting the digestion of dietary proteins. ### How much Actazin should I take daily? Typical dosing ranges from 100-600mg daily, though optimal dosing has not been established through clinical trials. Most supplement formulations provide 200-400mg per serving, often taken with protein-containing meals to maximize enzymatic activity. ### Can Actazin help with protein powder digestion? Actazin may theoretically assist with protein powder digestion due to its actinidin enzyme content. The enzyme can break down various protein types including whey and casein, though specific studies on protein supplement digestion are lacking. ### Is Actazin the same as eating kiwifruit? Actazin is a concentrated, standardized extract providing consistent actinidin enzyme levels, while whole kiwifruit contains variable enzyme amounts. The extract removes fiber and sugars while concentrating the proteolytic compounds for targeted digestive support. ### Who should avoid taking Actazin supplements? Individuals with kiwifruit allergies should avoid Actazin due to potential allergic reactions. Those with latex allergies may also react due to cross-reactivity, and people taking prescription digestive enzyme medications should consult healthcare providers before use. ### Does Actazin work better on an empty stomach or with food? Actazin is designed to work optimally when taken with meals containing protein, as the actinidin enzyme functions best in the presence of food to support digestion. Taking it on an empty stomach may reduce its effectiveness since there are no proteins for the enzyme to act upon. Most users take Actazin with their largest protein-containing meal of the day for best results. ### How does Actazin compare to other plant-based digestive enzymes like bromelain or papain? Actazin contains actinidin, a cysteine protease from kiwifruit, whereas bromelain comes from pineapple and papain from papaya—each with slightly different enzyme profiles and pH optima. Actazin is unique in that it works across a broader pH range and may have additional benefits for both upper and lower digestive tract function. The choice between them depends on individual tolerance and specific digestive concerns, as clinical head-to-head comparisons are limited. ### What does current clinical research actually show about Actazin's effectiveness? Most claims about Actazin's protein digestion support are based on theoretical enzyme function and in vitro studies rather than robust human clinical trials. The manufacturer has published mechanistic data demonstrating how actinidin complements pepsin in the stomach, but independent peer-reviewed studies on its real-world efficacy in supplement form remain limited. Bowel regularity claims are primarily manufacturer-supported assertions without published clinical evidence to date. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*