A comprehensive survey of 2,783 Puerto Rican young adults reveals alarming health disparities: 40.5% experienced poor mental health for six or more days monthly, while 57.2% were overweight or obese. Additionally, 14.7% reported elevated blood sugar or prediabetes, and 10.9% had hypertension. Despite 90.3% having health insurance, 36.9% faced financial barriers to care and 32.3% lacked primary care providers. These findings illuminate critical early-adulthood health patterns that could predict decades of chronic disease burden. The high prevalence of cardiometabolic risk factors in this young cohort is particularly concerning, as these conditions typically compound over time, accelerating cardiovascular aging and reducing healthspan. The mental health crisis documented here may exacerbate physical health decline through stress-inflammation pathways and poor health behaviors. Gender differences emerged, with females reporting worse mental health but better preventive care engagement, while males showed higher rates of hypertension and tobacco use. Since this is a preprint awaiting peer review, these striking prevalence figures require validation. However, if confirmed, they suggest urgent need for early intervention strategies targeting this vulnerable population to prevent premature chronic disease onset.