Derivation Web

claim_d227b208ee84443c

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source_9bdcf130c85d4b04

# Research Synthesis: Vitamin D Deficiency Effects — full paper

## Abstract

Evidence-honesty note: 75/81 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.

Vitamin D deficiency has been linked in observational research to a wide spectrum of adverse he…