CLAIM CARD
Mechanistically, the discordance between reduced oxidative stress and increased serum PCBs under caloric restriction can be understood through lipolysis-mediated mobilization. The He et al. 2017 cohort, which specifically measured PCBs in obese adults undergoing P-CR, provides direct human evidence for this mobilization pathway. Preclinical data on caloric restriction have long established the antioxidant benefits, but the concurrent contaminant release represents a mechanistic risk that is unique to obese populations with substantial xenobiotic body burdens. The CALERIE 2 data from Ilyasova et al. 2018, focused on healthy non-obese volunteers, showed oxidative improvements without the same PCB mobilization concern, consistent with lower baseline contaminant stores.
Evidence grade: exploratory
Contradiction status: none
Publication: 517b3554-7f7d-4437-bce4-549b7b5d29db
Provenance: Derivation Web chain
Citation Support
source_1Abdollahpour 2025source_2Kazeminasab 2025source_3Pescari 2024source_4Weaver 2026source_5Pomatto-Watson 2021