ArticlePoultry science2026
The effects of graded levels of quillaja saponins on the productivity of commercial laying hens.
Article in Poultry science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A study was conducted to determine the effects of feeding graded levels of quillaja saponins (Clarity Q®, Huvepharma, Antwerp, Belgium) on the performance and productivity of commercial layers. Three thousand H&N layer pullets were given one of 4 levels (0, 125, 250 and 500 mg/kg) of quillaja saponins in feed and their growth performance was monitored throughout a 5-to-15-week rearing period in a completely randomized design. At 16 weeks, pullets were moved to a laying facility where they continued to consume the same treatment feeds through 60 weeks of age. At 21 weeks, collection of egg production data began, with hen day egg production (HDEP), egg weight (EW), egg mass (EM), feed intake and feed efficiency (g feed consumed/g of egg) used as primary response variables. Data were analyzed for 2 production periods: 21 to 40 and 41 to 60 weeks of age. Additionally, eggshell thickness was measured biweekly from weeks 39 to 59 in 40 randomly selected eggs per treatment. During the rearing period, quillaja saponins significantly increased weight gain per week and improved feed conversion values (p < 0.05). Analysis of hen-day egg production (HDEP) at 40 weeks of age demonstrated that quillaja addition at 500 mg/kg significantly improved HDEP compared to the 0 and 125 mg/kg levels. EW, EM and feed efficiency were significantly improved by both 250 and 500 mg/kg compared to the lower quillaja levels, but significant differences between 250 and 500 mg/kg were not observed. By 60 weeks of age, HDEP was maximized by quillaja addition at 250 mg/kg, and EW, EM and feed conversion plateaued such that significant differences between 250 and 500 mg/kg were not observed. Eggshell thickness responded similarly, with significant differences observed at 250 and 500 mg/kg compared to the other feeding levels. Data from this study data indicate that egg production variables were positively affected by quillaja additions to feed at both 21 to 40 and 41 to 60 weeks of age and 250 mg/kg produced the most consistent responses in egg production criteria.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.