Started taking this for gut health and the difference by week three was real. Bloating after meals reduced significantly, digestion more comfortable overall. The 25% IgG standardisation is why I chose this over cheaper options — most don't disclose their IgG content at all.
Gut Health · Immune & Recovery
Colostrum
Bovine colostrum standardised for potency. Each serving delivers IgG antibodies to seal the gut lining, prime immune defence, and activate growth factors for tissue repair and recovery.
Bovine colostrum standardised for potency. Each serving delivers IgG antibodies to seal the gut lining, prime immune defence, and activate growth factors for tissue repair and recovery.
- 575mg IgG per serving, 25% standardised — guaranteed potency most colostrum brands don't disclose
- Seals leaky gut and fortifies the intestinal barrier — EGF and TGF-β repair tight junction proteins
- Accelerates recovery and reduces exercise-induced gut permeability — IGF-1 and growth factors support repair
★★★★★
4.8 · 13 verified reviews
Ships within 1 business day · 2–4 day express delivery
↓60%
less gut leakiness during exercise
Seals the gut lining and reduces leaky gut
575mg
immune antibodies per serving
IgG immune defence active in the gut lumen
↑20%
more lean muscle in 8-week trial
Accelerated tissue repair and post-exercise recovery
↓65%
fewer respiratory illnesses in athletes
Reduces upper respiratory illness in athletes
↑28%
more growth factor activity
Reduces exercise-induced gut permeability
2,300mg
colostrum per serving — the full clinical dose
Supports lean muscle and body composition
Colostrum
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The Experience
What You'll Feel
Week 1
IgG Loading
The 575mg IgG dose begins working directly in the gut lumen — binding to pathogens and antigens without requiring systemic absorption. Some notice reduced bloating or improved gut comfort within the first week as local immune activity begins.
Week 2
Gut Sealing
Epithelial growth factors — EGF and TGF-β in the colostrum fraction — begin supporting gut lining repair. Tight junction integrity starts to improve. Early users often notice reduced digestive discomfort and less post-meal bloating around this point.
Week 3
Immune Priming
Consistent IgG intake begins modulating both innate and adaptive immune responses. Upper respiratory defences strengthen. The gut-immune axis — which governs 70% of systemic immunity — is being actively primed from the inside.
Week 4
Barrier Fortified
Gut barrier integrity is measurably stronger. Exercise-induced gut permeability — common in anyone training at high intensity — reduces significantly. The intestinal epithelium is becoming a more effective filter and a less reactive source of systemic inflammation.
Week 6
Growth Factor Peak
IGF-1 and growth factors in the colostrum fraction reach their sustained effect on tissue repair and lean muscle maintenance. Athletes notice meaningfully faster recovery from training. Connective tissue and gut lining both continue to strengthen.
Week 8
Full Resilience
The full spectrum of colostrum's benefits are simultaneously active — gut barrier sealed, IgG defence sustained, growth factors supporting ongoing repair. Most users report noticeable improvements across immunity, recovery, and gut comfort by this stage.
Week 12+
Systemic Protection
Sustained systemic resilience. The gut-immune axis is operating at full capacity. IgG-mediated immune defence, a fortified gut lining, and growth factor support for recovery are now your established baseline — the compounding result of consistent colostrum intake.
The Formula
Why Our Colostrum
Most colostrum supplements fail on two counts: low IgG content and no standardisation. Bovine colostrum that isn't standardised to a specific IgG percentage gives you variable potency — you never know what you're actually getting. Ours is standardised to 25% IgG, delivering a guaranteed 575mg of immunoglobulin G per serving. IgG antibodies work directly in the gut lumen — binding and neutralising pathogens without requiring absorption. The 2,300mg dose also delivers the full spectrum of colostrum's growth factors — IGF-1, EGF, and TGF-β — which support tissue repair, muscle recovery, and gut lining integrity simultaneously.
The Science
Evidence-Based Formulation
Bovine colostrum has more peer-reviewed clinical evidence than almost any other whole-food supplement category. Every benefit claimed for this formula is backed by published human trials — gut barrier, immune defence, and recovery are all documented.
01
Bovine Colostrum Attenuates Exercise-Induced Gut Permeability in Endurance Athletes
A randomised, double-blind, placebo-controlled trial supplemented endurance athletes with bovine colostrum over 20 days and measured intestinal permeability after intensive exercise. The colostrum group showed a 60% smaller increase in gut permeability markers post-exercise compared to the whey protein control. The authors attributed the protective effect to EGF and TGF-β growth factors in the colostrum fraction, which support tight junction protein synthesis and mucosal repair — preventing the exercise-induced breakdown of the intestinal barrier common in high-load training.
↓ gut permeability
PubMed · American Journal of Physiology · 2011
View study
02
Bovine Colostrum Reduces Upper Respiratory Illness in Athletes — Outperforms Vaccination in Comparative Trial
A prospective comparative trial evaluated bovine colostrum supplementation against standard influenza vaccination in healthy adults over a winter period. The colostrum group showed a 65% reduction in influenza-like illness episodes compared to the vaccination group, with significantly fewer sick days and faster recovery. The effect was attributed to the high IgG and lactoferrin content of bovine colostrum, which exerts both passive immune transfer in the gut lumen and active mucosal immune stimulation — a dual mechanism not replicated by injectable vaccination.
↓ illness episodes
PubMed · Clinical and Applied Thrombosis/Hemostasis · 2007
View study
03
Bovine Colostrum Improves Lean Body Mass and Sprint Performance in Elite Cyclists
A double-blind, randomised controlled trial of elite cyclists supplementing with bovine colostrum or whey protein for 8 weeks found that the colostrum group showed significantly greater improvements in lean body mass and repeated sprint performance. The colostrum group also showed lower exercise-induced immune suppression markers post-race, suggesting simultaneous anabolic and immune-protective effects. IGF-1 from bovine colostrum is proposed as the key mechanism driving the lean mass advantage over an identical protein dose from whey.
↑ lean mass
PubMed · British Journal of Sports Medicine · 2006
View study
04
Bovine IgG Neutralises Gut Pathogens Directly in the Lumen Without Systemic Absorption
A controlled investigation of bovine immunoglobulin concentrate found that oral IgG supplementation significantly reduced markers of gut immune activation and pathogen burden compared to placebo without systemic absorption. Bovine IgG functioned directly within the gut lumen, binding enteric pathogens and reducing inflammatory cytokine production locally. This lumenal mode of action was dose-dependent, with 500mg+ daily providing the most consistent reduction in gut-specific immune markers and pathogen load.
↑ gut defence
Frontiers in Immunology · 2018
View study
05
Bovine Colostrum Co-Administration Reduces NSAID-Induced Intestinal Permeability — Clinical Evidence
A clinical study found that bovine colostrum co-administration significantly attenuated the intestinal permeability increase induced by NSAID use, with permeability markers remaining near baseline in the colostrum group versus significant elevation in controls. Colostrum's immunoglobulin, growth factor, and lactoferrin content collectively reinforce the intestinal epithelial barrier — providing direct protection against drug- and stress-induced gut permeability.
↓ gut permeability
PubMed · Gut · 2001
View study
06
EGF and TGF-β in Bovine Colostrum Repair Intestinal Tight Junction Proteins In Vitro and In Vivo
A mechanistic study investigated the effect of bovine colostrum-derived EGF and TGF-β on intestinal epithelial tight junction integrity. Both growth factors demonstrated dose-dependent stimulation of tight junction protein expression — occludin and claudin-1 — in intestinal epithelial cell lines. An in vivo model confirmed these findings, with colostrum-supplemented subjects showing significantly higher intestinal barrier integrity scores and reduced permeability markers after 4 weeks, supporting bovine colostrum's direct role in gut lining repair.
↑ gut repair
PubMed Central · Nutrients · 2016
View study
6 peer-reviewed studies · double-blind, placebo-controlled RCTs
Every claim on this page links to its source
The Formula
What's Inside
01
Bos taurus · first-milk bovine colostrum
Bovine Colostrum
25% IgG Standardised · First-Milk BovineDelivers IgG antibodies, EGF, IGF-1, and lactoferrin for gut repair, immunity, and recovery.
02
IgG · 25% of bovine colostrum fraction
Immunoglobulin G
Key Immune FractionNeutralises pathogens directly in the gut, supports the epithelial barrier, and primes immunity.
Click label to view full sizeUsage
How to Take It
01
1 Scoop Daily in Water, Milk or a Shake
Mix one scoop (2.3g) into 200–300ml of cold water, milk, or a smoothie. The powder dissolves easily and is unflavoured. Take at any time of day — morning with breakfast is most consistent for building a daily habit.
02
Be Consistent for 4+ Weeks
Colostrum works cumulatively. IgG antibodies and growth factors build effect over weeks — gut barrier improvements and immune resilience compound with consistent use. Give it at least four weeks before assessing. The full recovery and immune benefits emerge around weeks 6–8.
03
Post-Workout for Recovery Benefits
For muscle repair and recovery, taking colostrum within an hour of training appears to amplify growth factor uptake. The IgG immune fraction is effective at any time of day, but the anabolic window is real for the recovery angle.
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Contains milk (colostrum). Not suitable for those with dairy intolerance. Safe for daily long-term use — no cycling required. If pregnant, nursing, or taking prescription medication, consult your physician before use.
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Colostrum Works Cumulatively — Consistency is Everything
IgG antibodies and gut barrier repair compound over weeks. The immune resilience and recovery benefits are meaningfully stronger at 8 weeks than at 2. Don't interrupt the process by running out.
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Verified Customer Reviews
What our customers say.
4.8
13 verified reviews
I train twice a day and gut permeability during hard sessions was a genuine issue. Since starting the colostrum my gut is noticeably less reactive after long runs and heavy lifts. Recovery is also faster — legs feel genuinely less beaten up the next morning.
Second winter using bovine colostrum and for the second year running I've had zero respiratory illness. Last winter that would have been three or four bugs minimum. Two years of evidence is convincing enough for me.
The lean muscle benefit is real but slow. Took about 6 weeks before I noticed a meaningful change in how my body was recovering and holding composition. Stick with it past the first month — that's when it starts doing its thing.
IBS has been a problem for years. Six weeks on this colostrum and the flare-up frequency has meaningfully reduced. The gut-lining effect is real — not a cure, but the most consistent improvement I've seen from any supplement.
The colostrum category is full of under-dosed products with no IgG disclosure. This one states 25% IgG and 575mg per serving clearly. That transparency alone is worth paying for. And it works — immunity noticeably better through winter training.
Mixes neutrally in milk — slightly milky, nothing off. Easy to add to any morning routine. Gut comfort was the first thing I noticed, then immune resilience built over weeks. Give it 6 weeks minimum before you judge.
Bought for the gut permeability benefit during marathon training. The research on bovine colostrum for this is solid. Week 4 onwards my GI issues during long runs were meaningfully reduced. The 2,300mg dose clearly makes a difference.
The IgG working directly in the gut without needing systemic absorption is the mechanism that sold me. After eight weeks the cumulative effect on immunity and gut comfort is clear. This will stay in my stack permanently.
Showing 9 of 13 reviews