Actinidin &
Actinizyme®
kiwifruit-powered support for collagen, plant protein digestion & muscle performance.
Actinizyme® leverages a unique combination of actinidin (a protease unique to kiwifruit), whole-fruit fibre and phytonutrients to turbo-charge plant protein and collagen digestion, improve amino acid availability and support muscle growth and recovery in high-protein diets.
what is ACTINIDIN?
Actinidin is a cysteine protease found at high levels in green kiwifruit, where it can account for up to around 40% of the fruit’s soluble protein.
It belongs to the same broad family as papain and bromelain but has distinct substrate preferences, targeting peptide bonds that are relatively resistant to common gastric and pancreatic proteases.
By cutting protein chains at additional sites, actinidin complements pepsin, trypsin and chymotrypsin to achieve a more complete breakdown of complex dietary proteins.
This is particularly helpful for structurally dense proteins and proteins encapsulated within plant cell walls, supporting more efficient release of muscle building amino acids.
How actinidin supports
plant protein &
collagen for muscle
growth.
Proteins must be digested into small peptides and amino acids before they can be absorbed and used for muscle building, tissue repair and metabolic functions.
Actinidin accelerates this process in the stomach by helping to unfold and hydrolyse tough proteins that otherwise digest slowly, supporting quicker amino acid delivery to the bloodstream.
Research shows that actinidin:
- Leads to faster amino acid appearance in the bloodstream following protein rich meals.
- Supports more efficient use of protein for muscle building, recovery and adaptation to training.
actinidin
& plant proteins.
Plant proteins are often embedded in fibres and plant cell walls made of cellulose, hemicellulose and pectin that human enzymes cannot fully dismantle.
Actinidin helps expose and hydrolyse these encapsulated proteins.
Actinidin has demonstrated activity on pea, soy, almond, quinoa and wheat gluten, increasing the rate and extent of plant protein hydrolysis versus gastric enzymes alone.
This can narrow the digestibility gap, supporting better amino acid delivery and muscle relevant protein quality in plant forward diets.
HYDROLYSES
PROTEINS.
improveS
PLANT PROTEIN
EFFICACY.
SUPPORTS
AMINO ACIDS.
WHAT IS
Actinizyme®?
Actinizyme is a non GMO, freeze-dried green kiwifruit powder from New Zealand, standardised to a high, consistent level of actinidin activity for use in supplements and functional foods.
It delivers actinidin in its natural whole fruit matrix, alongside kiwifruit fibre, polyphenols, vitamin C, vitamin E and potassium, providing a holistic, performance-oriented protein support ingredient.
- Skinless, seedless whole fruit powder for consistent composition and enzyme activity.
- Standardised actinidin content to ensure reliable protein digestion and amino acid release support.
- Fruit based format that fits clean label, high protein and sports nutrition formulations.
Because it uses whole kiwifruit rather than isolated enzyme extracts, Actinizyme offers both enzyme driven protein benefits and the broader whole fruit complex effects of kiwifruit bioactives.
Actinizyme®
& collagen products.
Collagen peptides and collagen enriched products are popular for beauty, joint and recovery support, and are increasingly used in performance and sports stacks.
Actinidin has been shown to effectively hydrolyse collagen like substrates, indicating it can further break down collagen peptides beyond the action of standard gastric enzymes.
By delivering a high, standardised level of actinidin in a whole kiwifruit matrix, Actinizyme provides targeted support for collagen powders, ready to mix drinks and collagen fortified functional foods.
Including Actinizyme alongside collagen can help:
- Promote more thorough breakdown of collagen peptides into smaller fragments and amino acids.
- Support faster amino acid availability from collagen containing products to complement muscle and recovery goals.
The tropical fruity flavour of Actinizyme provides a clear, kiwifruit-style fruit note that helps mask earthy or beany protein-notes, works well with other tropical flavours, and supports a simple smoothie-style taste in powder blends.
Actinidin vs. other
proteolytic enzymeS.
Actinidin is often compared with papain (papaya) and bromelain (pineapple), but its source, matrix and substrate profile make it particularly attractive for digestive health applications.
Everyday benefits
of actinidin-rich
Actinizyme®.
When formulated into capsules, chewables, powders or synbiotic products, Actinizyme can help a wide range of users get more out of the protein they consume.
- Protein users: Support more efficient use of plant and collagen proteins in shakes and blends.
- Active individuals & athletes: Help optimise amino acid delivery from high protein diets to support muscle building and recovery.
- Performance focused consumers: Integrate Actinizyme into pre and post workout products to complement training and protein strategies.
By uniting actinidin’s targeted protease activity with the broader bioactives of green kiwifruit, Actinizyme offers a differentiated, food based solution for modern, protein heavy, muscle focused lifestyles.
