Research Behind Animal Boost
What does the science tell us about humic and fulvic substances, gastrointestinal microflora and the changing digestive environment?
Animals don't eat the same diet throughout their lives.
A calf develops from a predominantly milk-fed animal towards a functioning ruminant.
Pasture changes.
Supplementary feeds are introduced and removed.
The rumen encounters different feeds as animals move through the season.
Behind all of those changes is a complex gastrointestinal environment — and, in ruminants, a microbial population central to digestion.
Animal Boost has undergone a class determination with New Zealand's Ministry for Primary Industries and is classified as an:
Oral gastrointestinal-acting microflora-enhancing compound
So when we look at research relevant to Animal Boost, this is where we concentrate:
What does independent animal research tell us about humic and fulvic substances and their relationship with gastrointestinal microflora, the rumen environment, fermentation and digestion?
Start with an important distinction
There are two different kinds of evidence on this page.
What we know specifically about Animal Boost
Animal Boost:
has undergone an MPI class determination
is classified as an oral gastrointestinal-acting microflora-enhancing compound
is a liquid humic and fulvic livestock supplement
is BioGro registered
is formulated and manufactured in New Zealand
has undergone independent analytical testing
carries batch identification with associated production records
has established commercial use in New Zealand livestock systems
What independent research tells us
Researchers around the world have investigated humic and fulvic substances and related humate preparations in livestock.
Those studies help us understand the wider science surrounding the product category.
They are not Animal Boost trials.
Animal Boost does not currently have controlled animal efficacy trials of its own.
Keeping those two evidence sets separate allows us to talk about some genuinely interesting research without pretending another product's results belong to Animal Boost.
Why gastrointestinal microflora matter
A ruminant doesn't digest feed alone.
The rumen contains a complex community of microorganisms involved in fermentation and the breakdown of feed.
Those microorganisms interact directly with the diet entering the animal.
And the digestive system itself changes substantially as a young animal develops.
That gives us several areas of particular interest:
Young animals and the developing gastrointestinal environment
Gastrointestinal microbial populations
The developing and mature rumen
Feed and pasture change
Rumen fermentation
Digestibility and nutrient utilisation
These are also areas that have been investigated in independent humic-substance research.
Calves: a changing gastrointestinal system
The first months of a calf's life involve substantial digestive development.
Milk feeding changes.
Solid-feed intake increases.
Microbial populations develop.
The rumen becomes increasingly functional.
Eventually the calf moves towards weaning and a predominantly pasture or solid-feed diet.
This makes young calves particularly interesting when looking at gastrointestinal research.
What has actually been studied?
A controlled 2022 study followed 40 newborn Holstein dairy calves for 53 days.
Researchers divided the calves into four groups and orally supplemented three groups with different amounts of a humate preparation.
They measured:
growth
faecal scores
diarrhoea incidence
blood parameters
faecal microbial populations
What did they find?
The researchers reported measurable differences in gastrointestinal microflora.
With increasing supplementation, the abundance of Bifidobacterium and Lactobacillus increased, while E. coli abundance decreased.
These are measured microbial outcomes — not proposed mechanisms.
And the researchers found something else of particular interest to calf rearers.
Faecal scores and diarrhoea incidence
During days 1–20, calves receiving the higher supplementation levels had significantly lower faecal scores and diarrhoea incidence than the control and lower-supplementation groups.
That gives this study particular relevance when thinking about the gastrointestinal environment of young calves.
What does that research mean for calf scours?
Calf scours has multiple possible causes.
The value of this research isn't that it proves one supplement solves every cause of diarrhoea.
It's that researchers simultaneously measured:
oral humate supplementation
↓
changes in gastrointestinal microbial populations
and
differences in faecal scores and diarrhoea incidence
within the same controlled calf experiment.
That's a much more useful finding than simply assuming that “gut support” must be connected to scours.
How does it relate to Animal Boost?
Animal Boost's defined role is supporting gastrointestinal conditions associated with normal, favourable microflora.
That makes the microbial findings particularly relevant to understanding the science surrounding its product category.
However, the researchers used a different humate preparation.
The study therefore doesn't establish that Animal Boost will produce the same microbial changes or faecal outcomes, and we don't present Animal Boost as a treatment for calf scours.
From calf to ruminant
As the calf develops, the digestive story changes.
The rumen becomes increasingly functional and microbial fermentation becomes central to the animal's ability to utilise its diet.
That changes the research question too.
Instead of looking primarily at the intestinal environment of the young calf, mature-cattle research can look directly at:
rumen microbial populations
fermentation
rumen chemistry
nutrient digestibility
nitrogen utilisation
And this is where the mature-cattle research becomes particularly interesting.
Mature cattle: looking directly inside the rumen
A particularly useful 2018 experiment involved eight ruminally cannulated Angus × Hereford beef heifers.
Because the cattle were cannulated, researchers could directly investigate the rumen environment.
The animals received a control diet or different amounts of humic substances.
Researchers measured:
rumen microbial populations
fermentation
ruminal pH
nutrient digestibility
nitrogen retention
methane production
What did they find?
Humic supplementation altered the relative abundance of some measured rumen microbial groups.
Researchers also found increased apparent crude-protein digestibility and improved nitrogen retention.
Some fermentation-related measures changed with supplementation.
But importantly:
Not everything changed.
Feed intake was similar between treatments.
And methane production was not significantly affected.
That's important because it demonstrates why individual research findings shouldn't be stretched into claims that humic supplementation improves every aspect of rumen function.
Why is the study important?
Researchers directly demonstrated that humic substances could interact with measurable aspects of the rumen microbial and digestive environment of mature cattle.
That's particularly relevant to Animal Boost's gastrointestinal and microflora focus.
Dairy cattle: fermentation, digestion and production
Humic substances have also been investigated in lactating dairy cattle.
A 2021 controlled experiment involved 15 early-lactation Friesian cows over a 90-day experimental period.
Researchers investigated:
feed utilisation
nutrient digestibility
rumen fermentation
milk-production measures
What did they find?
Humic supplementation was associated with increased digestibility of several measured nutrient fractions.
Researchers also found changes in rumen-fermentation measures.
Milk production increased under the conditions of the experiment.
That production finding is interesting — but it needs context.
What can we learn from it?
The study provides evidence that humic supplementation interacted with digestive and ruminal processes in mature dairy cattle.
It also demonstrates why we distinguish category research from Animal Boost-specific claims.
This was a relatively small controlled study using another humic preparation.
We therefore don't convert its milk-production result into a promise that Animal Boost increases milk yield.
The digestive and fermentation findings remain useful evidence for understanding the wider category.
What happens when feed changes?
This is where the science becomes particularly relevant to everyday farming.
The microbial population within the rumen interacts directly with the animal's diet.
When the feed entering the rumen changes, the substrates available to those microorganisms change as well.
That's why good nutritional management and appropriate feed transitions matter.
And it gives us a logical question:
Could gastrointestinal support have a place while animals are moving through normal feeding changes?
Animal Boost is designed to support gastrointestinal conditions associated with normal, favourable microflora.
Independent cattle research shows that related humic substances can interact with rumen microbial populations, fermentation and digestive parameters.
Those are complementary pieces of information.
They do not establish that Animal Boost prevents the consequences of poor transition feeding.
Good feeding management remains fundamental.
But they help explain why the gastrointestinal environment is a logical area to support when feed, pasture and feeding systems are changing.
What about acidosis?
Rapid changes towards highly fermentable diets can disrupt normal rumen conditions and are a recognised risk factor for acidosis.
The research into humic substances and the rumen is interesting because researchers have directly measured fermentation, ruminal pH, microbial populations and digestive parameters.
But those findings shouldn't be extended beyond what was actually demonstrated.
Animal Boost's role is supporting gastrointestinal conditions associated with normal, favourable microflora.
It isn't positioned as a treatment or prevention for acidosis.
Good transition feeding and appropriate nutritional management remain the important tools for managing acidosis risk.
Sheep and lambs: what does newer research show?
The small-ruminant evidence base is less developed than the cattle literature, but newer research is adding useful information.
A 2026 controlled study investigated 40 weaned lambs receiving either a normal diet or humic-acid supplementation for 56 days.
Researchers examined:
faecal consistency
gastrointestinal tissue
blood and biochemical measures
immune measures
parasite measures
growth and performance
What did they find?
Supplemented lambs showed improved faecal consistency and differences in some gastrointestinal immune-cell measures.
But this study is particularly useful because most of the measured outcomes didn't significantly differ between the groups.
Most haematological, biochemical, parasitological, histological and performance measures were not significantly different.
Why is a partly neutral study useful?
Because it gives us a more realistic picture of the science.
Humic supplementation doesn't automatically improve every outcome researchers measure.
Some aspects of the gastrointestinal environment may respond while other measures remain unchanged.
That's exactly why we prefer to publish the evidence rather than reduce it to a list of positive marketing claims.
Humic and fulvic together
Animal Boost is a liquid humic and fulvic livestock supplement.
So research that investigates both humic and fulvic fractions is particularly interesting.
A 2023 study in Damascus goats compared:
an unsupplemented control
humic acid
fulvic acid
combined humic and fulvic acids
Researchers investigated rumen fermentation, feed intake and apparent nutrient digestibility.
They reported measurable differences in several fermentation and digestibility parameters between treatments.
Why include goat research?
Not because goats are the commercial focus of Animal Boost.
Its value is scientific.
The researchers specifically compared humic, fulvic and combined humic + fulvic supplementation in a ruminant animal.
That makes it useful background research when considering a liquid humic-and-fulvic livestock supplement.
Again, it wasn't an Animal Boost trial.
What does the research collectively support?
Looking across the studies is more useful than relying on any one experiment.
Several themes emerge.
1. Gastrointestinal microbial populations
Controlled animal studies have reported measurable changes in gastrointestinal or rumen microbial populations following oral humate or humic-substance supplementation.
This is particularly relevant to Animal Boost's classification as an oral gastrointestinal-acting microflora-enhancing compound.
2. The rumen environment
Mature-cattle research demonstrates that humic substances can interact with measurable aspects of the rumen environment.
That includes microbial populations, fermentation-related measures and digestive parameters.
3. Digestibility and nutrient utilisation
Some controlled studies have reported differences in nutrient digestibility or nitrogen utilisation.
These findings add to our understanding of how humic substances may interact with the digestive system.
They don't establish identical outcomes for Animal Boost.
4. Faecal outcomes
The controlled calf study reported lower faecal scores and diarrhoea incidence at some supplementation levels.
More recent lamb research has also reported improved faecal consistency.
These are particularly interesting gastrointestinal findings.
They remain results from the specific preparations, animals and conditions investigated in those studies.
5. Production outcomes
Some studies report improvements in growth or milk-production measures.
Others report no significant differences in performance.
That variability matters.
It is why we don't position Animal Boost around promises of increased weight gain or milk production.
Why don't all studies produce the same result?
“Humic substances” isn't one standardised formulation.
Research preparations can differ in:
source
composition
concentration
humic and fulvic fractions
physical form
dose
administration method
The animals and farming systems differ too.
A milk-fed calf isn't a mature dairy cow.
A housed dairy cow receiving a controlled ration isn't the same as a New Zealand cow grazing changing pasture.
A developing lamb isn't an adult ewe.
Diet, age, management, dose and the existing gastrointestinal environment can all influence the result.
That's why we don't simply take the dose or outcome from another humate product and apply it to Animal Boost.
Measured results versus proposed mechanisms
This is one of the most important distinctions on this page.
If researchers measure a change in Bifidobacterium, that's a measured result.
If they measure a change in crude-protein digestibility, that's a measured result.
If they record lower diarrhoea incidence, that's a measured result.
Researchers may then propose mechanisms explaining why those changes occurred.
Those explanations can be scientifically useful, but they aren't the same thing as the measured result.
And we shouldn't build an unsupported chain such as:
microflora changed
↓
therefore digestion improved
↓
therefore immunity improved
↓
therefore production increased
Every step needs evidence of its own.
What does all of this mean for Animal Boost?
The research gives us good reason to remain interested in humic and fulvic substances and the gastrointestinal environment.
In young calves, research has demonstrated changes in measured faecal microbial populations alongside interesting faecal and diarrhoea outcomes.
In mature cattle, controlled research has demonstrated changes in aspects of the rumen microbiome, fermentation and digestive parameters.
In small ruminants, newer research is adding evidence around faecal consistency and gastrointestinal outcomes, while also showing that many measured outcomes may remain unchanged.
That creates a coherent scientific theme:
The gastrointestinal environment matters from the developing young animal through to the mature ruminant.
And that is the area in which Animal Boost has its defined role:
Supporting gastrointestinal conditions associated with normal, favourable microflora.
What the research doesn't establish
Being transparent about the boundary makes the useful findings more credible.
The studies on this page don't establish that Animal Boost:
treats or prevents calf scours
treats infectious disease
prevents acidosis
increases milk production
increases weight gain
improves fertility
produces every result reported for another humic or fulvic preparation
Animal Boost does not currently have controlled animal efficacy trials.
Instead, we use independent research for what it can legitimately tell us:
how humic and fulvic substances and related preparations have interacted with the gastrointestinal environment under controlled animal research conditions.
Selected research
Pre-weaned dairy calves — Wang et al., 2022
Animals: 40 newborn Holstein calves
Duration: 53 days
Investigated: Growth, faecal scores, diarrhoea incidence, blood parameters and faecal microflora
Key gastrointestinal findings: Changes in measured Bifidobacterium, Lactobacillus and E. coli populations; lower faecal scores and diarrhoea incidence at higher supplementation levels during the early study period.
Animal Boost trial: No
Beef heifers — Terry et al., 2018
Animals: 8 ruminally cannulated Angus × Hereford heifers
Investigated: Rumen fermentation, rumen microbiota, digestibility, nitrogen retention, ruminal pH and methane production
Key findings: Changes in some rumen microbial populations; increased crude-protein digestibility and nitrogen retention.
Useful neutral finding: Methane production was not significantly affected.
Animal Boost trial: No
Lactating dairy cows — Morsy et al., 2021
Animals: 15 early-lactation Friesian cows
Duration: 90-day experiment
Investigated: Feed utilisation, digestibility, rumen fermentation and milk-production measures
Key findings: Changes in nutrient digestibility and rumen-fermentation measures; milk-production differences were also reported.
Animal Boost trial: No
Weaned lambs — Santana et al., 2026
Animals: 40 weaned lambs
Duration: 56 days
Investigated: Faecal consistency, gastrointestinal tissue, blood, immune, parasitological and performance measures
Key finding: Improved faecal consistency and some gastrointestinal differences.
Useful neutral finding: Most other measured parameters, including performance, did not significantly differ.
Animal Boost trial: No
Humic + fulvic research — Sallam et al., 2023
Animals: Damascus goats
Investigated: Humic, fulvic and combined humic + fulvic supplementation; feed intake, rumen fermentation and apparent nutrient digestibility
Why it's relevant: Direct comparison of humic and fulvic substances, alone and together, in a ruminant model.
Animal Boost trial: No
Why we publish the research
Research should make a product easier to understand, not give us an excuse to make bigger claims.
We want farmers to be able to see:
What animal was studied?
What preparation was used?
What did researchers measure?
What actually changed?
What didn't change?
And how closely does that result relate to Animal Boost?
That's the standard we're using here.
The independent evidence gives us a credible scientific foundation for focusing on the gastrointestinal environment and normal, favourable microflora.
It also gives us clear boundaries.