↗ public sourceswww.addcon.com/index.php/de/feed/konservierung/kofa-grain-ph-5· 4 studies, 2 independent/mixed
Evidence · strong
The active substance is backed by 4 studies including meta-analyses; the verdict per claim below reflects what the literature actually shows, not the brochure. Strength reflects the active substance, not the brand.
What the manufacturer claims
Free
Captured from the product page, typed and attributed — the producer’s own statements, checked against the literature below.
Stability
Lasting preservation of moist grain and maize against yeasts and moulds (with EU authorisation)
Stability
Improves aerobic stability of silages against reheating (DLG quality mark 2); broad use from maize/CCM silage to moist-grain and by-products
Economic
Best feed hygiene for high animal performance; not corrosive and not dangerous goods; cost advantage over grain drying
Manufacturer’s own words — not independently verified. The ledger below gives the evidence verdict for each.
Claim ↔ evidence ledger
Verdict free · receipts in Power
Each claim against the studies on the active substance, with the funding split. Open a row for the studies behind the verdict.
Claim
Verdict
Evidence & funding
StabilityLasting preservation of moist grain and maize against yeasts and moulds (with EU aut…
Supported
1 study · 0% indep
›
Read Efficacy for moist-cereal preservation is confirmed by EFSA on this exact composition (applicant data).
2012
Safety and efficacy of sodium benzoate, propionic acid and sodium propionate as a preservative for high-moisture cereals (EFSA FEEDAP)Efficacious from ~3,000 mg/kg (cereals other than maize) and ~13,000 mg/kg (maize kernels); max 22,000 mg/kg cereal grain
StabilityImproves aerobic stability of silages against reheating (DLG quality mark 2); broad …
Supported
2 studies · 100% indep
›
Read Aerobic-stability and yeast/mould control by propionic acid are well supported independently.
2024
Effect of Lentilactobacillus buchneri and propionic acid on aerobic stability of high-moisture corn grain silagePropionic acid improved aerobic stability with lower pH and lower yeast and mould counts after air exposure
Effect of organic acids on yeasts, moulds and aerobic stability in corn silageFormic/propionic acid preparations reduced yeast counts (e.g. 8.5×10^7 to 2.6×10^7 CFU/g) and improved aerobic stability
EconomicBest feed hygiene for high animal performance; not corrosive and not dangerous goods…
Supported
1 study · 0% indep
›
Read Energy-preservation/economic benefit shown in a trade-press (industry) dataset.
2013
Aerobic preservation of brewers' grains / WDGS with a propionic acid + sodium benzoate blendPropionic acid + sodium benzoate stabilised wet by-products aerobically and preserved energy content, with a positive economic return
Why these studies The evidence for a proprietary product is the evidence for its active substance. These are the studies (meta-analyses first) behind the verdicts above, with funding labelled.
Year
Study & effect size
Funding
Type
Access
2012
Safety and efficacy of sodium benzoate, propionic acid and sodium propionate as a preservative for high-moisture cereals (EFSA FEEDAP)Efficacious from ~3,000 mg/kg (cereals other than maize) and ~13,000 mg/kg (maize kernels); max 22,000 mg/kg cereal grain
Effect of Lentilactobacillus buchneri and propionic acid on aerobic stability of high-moisture corn grain silagePropionic acid improved aerobic stability with lower pH and lower yeast and mould counts after air exposure
Effect of organic acids on yeasts, moulds and aerobic stability in corn silageFormic/propionic acid preparations reduced yeast counts (e.g. 8.5×10^7 to 2.6×10^7 CFU/g) and improved aerobic stability
Aerobic preservation of brewers' grains / WDGS with a propionic acid + sodium benzoate blendPropionic acid + sodium benzoate stabilised wet by-products aerobically and preserved energy content, with a positive economic return
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Analysis & tools
◆ Power
The working map a maker won’t give you — built only from the evidence on this page. Nothing here is marketing.
◆ Power view
Open the analyst workbench
Dose benchmark, the independent-vs-sponsored split, the pooled meta-analysis effects, the contradictions and the gaps — all derived from the studies above.
EFSA assessed this product’s protected form. Opinion ↗
Discussion — grounded in the evidence
KOFA GRAIN pH5 is an EU-authorised preservative (1a700) whose exact composition (sodium benzoate + propionic acid + sodium propionate) was assessed and confirmed efficacious by EFSA for moist cereals.
The propionic-acid chemistry behind it is independently well documented for suppressing yeasts and moulds and improving aerobic stability of grain and silage.
The effective dose depends strongly on grain moisture (≈3,000 mg/kg for cereals, ≈13,000 mg/kg for maize kernels), up to an authorised maximum of 22,000 mg/kg.
It is a buffered (pH ~5), less-corrosive alternative to pure acids, and also carries a DLG mark for improving aerobic stability as a silage additive.
The 'animal performance' benefit is indirect — via better feed hygiene — rather than a direct growth claim.
Where studies disagree: No material contradiction: the propionic-acid/benzoate chemistry is a long-established, EFSA-confirmed grain/silage preservative; the main caveat is that the effective dose depends heavily on grain moisture.
Gaps: No single meta-analysis specific to this exact blend (though EFSA pooled the efficacy data). Performance claims rest on hygiene/aerobic-stability rather than direct animal-performance trials.
Manufacturer’s stated mechanism (their words): A buffered blend of propionic acid, sodium propionate and sodium benzoate that inhibits yeasts and moulds in moist grain and maize and on feed-out, giving lasting preservation and improved aerobic stability with lower corrosivity than pure acids.
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Put this beside alternatives on the same active substance (e.g. HMBi / other rumen-protected methionine), and take the data with you.
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