BackgroundThe associations between specific types of sugary beverages and major chronic respiratory diseases remain relatively unexplored. ObjectiveTo investigate the associations of sugar-sweetened beverages (SSBs), artificially sweetened beverages (ASBs), and natural juices (NJs) with chronic obstructive pulmonary disease (COPD), asthma, and asthma-COPD overlap syndrome (ACOS). MethodsThis prospective cohort study included 210,339 participants from the UK Biobank. Sugary beverage intake was measured in units (glasses/cans/cartons/250 ml) through 24-hour dietary questionnaires. Logistic regression and Cox proportional hazards models were used to analyze the prevalence and incidence, respectively. Quantile G-computation was employed to estimate the joint associations and relative contributions of the three types of sugary beverages. ResultsOver a median follow-up of 11.6 years, 3,491 participants developed COPD, 4,645 asthma, and 523 ACOS. In prevalence analysis, certain categories of SSB and NJ consumption were associated with increased asthma prevalence, while high ASB consumption (>2 units/day) was linked to higher risks of all three outcomes. In incidence analysis, high SSB consumption (>2 units/day) was associated with incident COPD [hazard ratio (HR) 95% confidence interval (CI): 1.53 (1.19, 1.98)] and asthma [HR (95% CI): 1.22 (0.98, 1.52)]. Dose‒response relationships were observed for ASB consumption with all three outcomes [continuous HR (95% CI): 1.98 (1.36, 2.87) for COPD; 1.65 (1.24, 2.20) for asthma; and 2.84 (1.20, 6.72) for ACOS]. Moderate NJ consumption (>0-1 unit/day) was inversely associated with COPD [HR (95% CI): 0.89 (0.82, 0.97)], particularly grapefruit and orange juice. Joint exposure to these beverages (per unit increase) was associated with COPD [HR (95% CI): 1.15 (1.02, 1.29)] and asthma [HR (95% CI): 1.16 (1.06, 1.27)], with ASBs having greater positive weights than SSBs. ConclusionConsumption of SSBs and ASBs was associated with increased risks of COPD, asthma, and potentially ACOS, whereas moderate NJ consumption was associated with a reduced risk of COPD, depending on the juice type.