This study aimed to investigate the effects of Brazilian propolis on body fat mass and levels of adiponectin and reactive oxygen species among community-dwelling elderly females. This was a double-blind randomized placebo-controlled trial. Altogether, 78 females aged 66–84 years were randomly assigned to the propolis (PRO; n = 39) or placebo (PLA; n = 39) group. For 12 weeks, the PRO group were given three capsules containing 227 mg of propolis twice a day. Meanwhile, the PLA group were given daily placebo capsules. Of 78 participants, 53 (PLA group: n = 28, PRO group: n = 25) completed the study. Although no changes were observed in absolute or relative fat mass in the PLA group, they showed a significant decline in the PRO group. The level of serum adiponectin in the PLA group did not change, although that of the PRO group significantly increased. The level of d-ROMs in the PLA group significantly increased, whereas that of the PRO group significantly decreased. The serum SOD activity in the PLA group significantly decreased, whereas that of the PRO group tended to increase. These results suggest that propolis supplementation may decrease body fat mass and oxidative stress among community-dwelling elderly females.

Background: Type 2 diabetes mellitus (T2DM) is associated with impaired skeletal muscle mass and function; however, respiratory muscle involvement has not been fully investigated, particularly in Japanese patients. This study aimed to evaluate respiratory muscle strength and identify its associated factors in Japanese patients with T2DM. Methods: This cross-sectional study included 55 patients with T2DM without respiratory disease. Maximal inspiratory pressure (PImax) and maximal expiratory pressure (PEmax) were measured and expressed as percentages of the predicted values (PImax %pred and PEmax %pred). Clinical variables, including age, sex, body mass index (BMI), diabetic polyneuropathy (DPN), skeletal muscle index (SMI), handgrip strength, and 6-min walk distance (6MWD), were assessed. Correlation and multiple regression analyses were performed to identify factors associated with PImax %pred. Results: PImax %pred was significantly lower than the predicted value (69.5% [95% CI: 63.1–75.9], p < 0.001), whereas PEmax %pred did not differ significantly from the predicted value (95.6% [95% CI: 86.8–104.3]). PImax %pred was significantly associated with age, BMI, SMI, handgrip strength, and 6MWD. In multiple regression analysis, age, sex, BMI, and handgrip strength were independently associated with PImax %pred, whereas DPN was not. These findings remained unchanged after adjusting for smoking habits. Conclusions: Inspiratory muscle strength was selectively reduced in Japanese patients with T2DM and was independently associated with general physical characteristics and overall muscle strength. Inspiratory muscle weakness may reflect generalized skeletal muscle dysfunction rather than solely a neuropathic impairment. This assessment of respiratory muscle strength may provide additional insights into the physical function of patients with T2DM.