Adding Sacha Inchi oil to the feed of laying hens at a concentration of 3.0–4.5% for 56 days increases the proportion of yolk in the egg by 10–12%, without changing the total egg weight, shell...

We analyzed one assertion on whether Sacha Inchi oil affects yolk weight in laying hens, and it supports the idea that adding 3.0–4.5% Sacha Inchi oil to their feed for 56 days increases the proportion of yolk in the egg by 10–12%. This change happened without altering the total weight of the egg, the thickness of the shell, the internal quality, or the color of the yolk. What we’ve found so far is limited to this single study, but it clearly shows a measurable shift in yolk proportion under these specific conditions. The oil did not make eggs bigger or change other visible traits, which suggests the increase in yolk share came from a redistribution of components inside the egg rather than an overall growth. We don’t know if this effect continues beyond 56 days, or if lower or higher doses of the oil would have the same result. We also don’t know how this might affect hen health, egg production rates, or long-term outcomes. The evidence we’ve reviewed so far does not include any studies that contradict this finding, but the total number of studies analyzed remains very small. For farmers or producers considering Sacha Inchi oil as a feed additive, this suggests it may help increase the yolk portion of eggs without changing their size or appearance — but more research is needed to understand how consistent or sustainable this effect is.