Physiologic, Psychological, Nutritional, and Rest-Activity Observations During 120 Days of Low-Tech Off-Grid Living in the Baja California Desert: A 2-Participant Field Case Study

increased over time without evidence of physiologic compromise. No biochemical marker of micronutrient deficiency was identified. Although locally produced foods contributed ∼1% of total energy intake, they provided substantial micronutrient density. Ferritin levels remained within reference intervals despite transient mid-mission fluctuation in the female participant. Rest-activity rhythms remained robust across 120 d, with seasonal adjustment of sleep timing and modest sleep reduction. Anxiety did not increase, and affect balance remained positive. In this descriptive field case, prolonged low-tech off-grid desert living was compatible with maintenance of physical and psychological health. These findings provide ecologically grounded observations relevant to human functioning in resource-limited environments.