How much fat can the body absorb? Implications for daily fat distribution
Indeed, lipid fecal loss remains below 5% (w/w) even in situation of
  high fat supply in healthy humans, [30].


All about those guts and bowls folks!



Niot, I., Poirier, H., Tran, T. T. T., &amp; Besnard, P. (2009). Intestinal absorption of long-chain fatty acids: Evidence and uncertainties. Progress in Lipid Research, 48(2), 101–115. doi:10.1016/j.plipres.2009.01.001

https://sci-hub.tw/10.1016/j.plipres.2009.01.001

[30] Ross AC. Overview of retinoid metabolism. J Nutr 1993;123:346–50



The issue remaining is how Ross' work doesn't seem to say anything about lipids. Yet, it appears from the mice studies nearly all fat is absorbed (except for ones with special conditions). 

Ross, A. C. (1993). Overview of Retinoid Metabolism. The Journal of Nutrition, 123(suppl_2), 346–350. doi:10.1093/jn/123.suppl_2.346 

https://sci-hub.tw/https://doi.org/10.1093/jn/123.suppl_2.346