A recent review summarizes experimental and clinical observations linking ketogenic dietary patterns to multiple pathways that may affect gamete development, including oxidative stress, inflammation, hormonal milieu, cellular energy metabolism and autophagy. The authors note that protective signals are reported, but effects on apoptosis and inflammation appear limited and dependent on metabolic context.
Study and findings
Zhang et al. (2026) compiled recent pre‑clinical and clinical reports that examined how a high‑fat, adequate‑protein, low‑carbohydrate regimen—commonly termed ketogenic diet (KD)—modulates gametogenesis in both sexes. The review highlights that KD can attenuate oxidative stress markers and activate autophagic pathways in germ cells, which are mechanisms theoretically supportive of gamete quality. Conversely, the authors point out that evidence for KD‑driven reductions in apoptosis or inflammatory cytokines is inconsistent, and that outcomes appear to vary with the subject’s baseline metabolic status and the precise macronutrient composition of the diet.
Clinical interpretation
For clinicians considering KD in patients with reproductive concerns, the current literature suggests a plausible biochemical environment that could favor gamete preservation, chiefly through reduced reactive oxygen species and enhanced cellular recycling. However, the lack of robust human trials means that any therapeutic claim remains speculative. The reported variability—depending on factors such as insulin sensitivity, body weight, and diet formulation—implies that KD may benefit only a subset of individuals, and that unintended effects on hormonal balance cannot be excluded.
Limitations and open questions
The review is based largely on animal models and isolated cellular studies; direct evidence in humans is scarce. Moreover, the abstract does not specify study designs, sample sizes, or quantitative effect estimates, limiting assessment of clinical relevance. Key unanswered issues include whether KD can reliably improve fertilization outcomes, how long‑term adherence influences endocrine function, and what dietary thresholds (fat, protein, carbohydrate) are required to achieve the reported molecular effects without adverse metabolic consequences. Controlled clinical trials are needed to delineate these parameters.
Source
Zhang T, Cao C, Pang W. [Research progress on the role and mechanism of ketogenic diet in regulating gametogenesis]. Sheng Wu Gong Cheng Xue Bao. 2026;42(8):3391-3402. doi: 10.13345/j.cjb.250934. PMID: 42638043.