A study on type 2 diabetic patients using Twin Precision Nutrition observed significant improvements in metabolic health markers (e.g., Hba1C, weight, HOMA-IR), with most patients ceasing the use of medications (including insulin, metformin, DPP-4 inhibitors, and liraglutide) [99]. The gene discussed is DPP4; the disease is type 2 diabetes mellitus.