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This question is named analogous to this research: How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution http://ncbi.nlm.nih.gov/pmc/articles/PMC5828430

How many grams of lipids can the body absorb in one sitting? (I ask because a strict vegetarian or vegan diet is characteristically low in fat. Therefore, I consume extra virgin olive oil and nuts.)

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Most of the research on pubmed.gov is about oral lipid drug administration/absorption. This work that seemed to come close is over my head and just doesn't seem to specify:

Intestinal Lipid Absorption and Transport by C T Phan 1 and P Tso

PMID: 11229876 DOI: 10.2741/phan

https://www.bioscience.org/2001/v6/af/A612/fulltext.htm

Image sources: Cronometer.com and Jackedonplants.co.uk

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  • $\begingroup$ +1. For being a very interesting question $\endgroup$
    – Constantthin
    Jan 10, 2021 at 13:06

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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!

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Niot, I., Poirier, H., Tran, T. T. T., & 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

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  • $\begingroup$ Your first sentence answers the question. Or practically: If the amount of fat you consume does not make your stools fatty (steathorrhea), it means you are absorbing most of it. $\endgroup$
    – Jan
    May 25, 2020 at 15:11
  • $\begingroup$ Maybe the amount of bile liver is able to produce and gall to secrete is some super natural limit. $\endgroup$
    – Peter Bernhard
    Nov 7, 2021 at 15:40

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