Over 98% of H.V.M.N. Ketone Ester is metabolized rather than excreted.
In a study where participants consumed 24g of BHB ketone ester, (approximately the same as the 25g in one bottle of H.V.M.N. Ketone Ester), average urine excretion of BHB was 0.3g over 4h. This represents ~1.5% of the total ~24g of BHB consumed.
As blood ketone levels had rapidly fallen in this time, the remaining BHB had been used in metabolism rather than excreted.
Source: https://www.frontiersin.org/articles/10.3389/fphys.2017.00848/full [Figure 1 (I)]
Learn all you need to know about ketones in urine here: https://hvmn.com/blog/ketosis/ketones-in-urine-all-you-need-to-know