Table 8.

Summary of PFAS half-lives in the present study and in other studies referred to in the discussion.

PFAS	Half-life in the present study	Half-life in other study	Study population	Year of study	Follow-up time	Reference
PFHpA	0.17 y (62 d)	70 d	5 ski wax technicians	2007–2011	7 months	Russell et al. 2015a
PFOA	1.77 y	2.7 y	106 Swedes	2014–2016	2 y	Li et al. 2018
		3.8 y	26 retired fluorochemical production workers	1999–2004	5 y	Olsen et al. 2007
		3.3 y	138 Germans	2006–2008	2 y	Brede et al. 2010
		2.3 y	200 Americans	2007–2008	1 y	Bartell et al. 2010
PFBS	0.12 y (44 d)	25.8 d	6 3M employees	2004	3 months	Olsen et al. 2009
PFPeS	0.63 y	1.0 y	108 Swedes	2014–2019	5 y	Li et al. 2019
PFHxS	2.86 y	5.3 y	106 Swedes	2014–2016	2 y	Li et al. 2018
L-PFOS	2.91 y	3.4 y	106 Swedes	2014–2016	2 y	Li et al. 2018

Note: L-PFOS, linear perfluorooctane sulfonic acid; PFAS, perfluoroalkyl substances; PFBS, perfluorobutane sulfonic acid; PFHpA, perfluoroheptanoic acid; PFHxS, perfluorohexane sulfonic acid; PFOA, perfluorooctanoic acid; PFPeS, perfluoropentane sulfonic acid.