Research Synthesis: Fasting Intervention Intermittent Fasting Effects

Researka accepted publication: b1750150-b7b0-4272-9e1c-c6eaf8f52abc Source submission: af0f22cb-6eef-4e46-ae60-092ca61f925a Evidence-honesty note: 16/17 retained sources are indirect, review-level, adjacent, or mechanistic and are used only to bound interpretation. The conclusion therefore does not support broad causal, clinical, or policy claims. This paper synthesizes evidence on fasting intervention intermittent fasting effects across 17 included source papers and 1812 high-confidence extracted claims. The evidence profile contains 1 direct clinical source, 2 adjacent clinical sources, and no sources classified primarily as mechanistic or model-system evidence, with 47 cross-study disagreements across the evidence base. Positive study-level signals are not the dominant direction in any outcome class; null signals are summarized in the contextual adjacent evidence outcome class; negative signals are not the dominant direction in any outcome class; mixed or heterogeneous signals are summarized in the cardiometabolic, immune, and muscle function outcome classes. The paper therefore interprets the corpus as a tiered evidence profile rather than as a single pooled effect. The conclusion is that fasting intervention intermittent fasting effects should be treated as a bounded geroscience hypothesis: the retained clinical and adjacent evidence profile defines the scope for targeted testing, while mixed and null findings limit any unqualified anti-aging claim.