The keywords used as search terms for our literature review were ‘Rosmarinus officinalis’, ‘rosemary’, ‘carnosic acid’, ‘carnosol’, ‘NLRP3′, ‘Alzheimer’s disease’, ‘Parkinson’s disease’, ‘COVID’, and ‘NRF2′. The gene discussed is NLRP3; the disease is early-onset autosomal dominant Alzheimer disease.