Recent research has underscored the efficacy of Lactobacillus plantarum (L. plantarum) in managing obesity among healthy adults. This meta-analysis reviewed randomized controlled trials (RCTs) from major databases up to May 2024, focusing on the effects of L. plantarum on body weight, body mass index (BMI), and metabolic parameters. This study has been registered in PROSPERO (number: CRD 42024531611). The analysis of nine studies revealed significant weight reduction and BMI decreases with L. plantarum supplementation compared to a placebo. Notably, using more than two strains together enhanced these effects. Improvements were also observed in abdominal fat and inflammatory markers such as interleukin-6 (IL-6) and high-sensitivity C-reactive protein (hs-CRP). This meta-analysis synthesizes evidence from nine RCTs to test the hypothesis that L. plantarum supplementation effectively reduces body weight and BMI in healthy adults compared to a placebo. However, variations in study designs, probiotic strains, and intervention durations call for more robust trials to confirm these benefits.

Chronic pruritus is a distressing condition that significantly impacts patients’ quality of life. Recent research has increasingly focused on the potential role of vitamin D, given its immunomodulatory properties, in managing this condition. This meta-analysis seeks to systematically assess the effectiveness of vitamin D supplementation in alleviating chronic pruritus across diverse clinical contexts. We conducted an extensive search through multiple databases, covering literature up to July 2024, to identify relevant randomized controlled trials (RCTs) that evaluated the effect of vitamin D on chronic pruritus. Eligible studies were those that provided data on changes in pruritus severity, as measured by standardized tools, before and after vitamin D treatment. The data were synthesized using a random-effects model to address variability among the studies. This meta-analysis is registered with PROSPERO (registration number: CRD42024579353). The findings indicate that vitamin D supplementation is associated with a significant reduction in pruritus severity, the skin lesion area, and levels of inflammatory cytokines, including tumor necrosis factor (TNF), interleukin-6 (IL-6), and high-sensitivity C-reactive protein (hs-CRP), compared to controls. These results suggest that vitamin D could be a promising therapeutic option for chronic pruritus, though further rigorous studies are required to validate these findings and to elucidate the mechanisms involved.

Metabolic syndrome refers to a group of conditions that commonly occur together, including abdominal obesity, high blood pressure, elevated blood sugar, high triglyceride levels, and low high-density lipoprotein cholesterol (HDL). These factors collectively increase the risk of cardiovascular disease, diabetes, and cognitive impairment. Recent research has identified a connection between metabolic syndrome and cognitive disorders such as mild cognitive impairment and vascular dementia (VaD). Mulberry (Morus alba L.) is a natural source of bioactive compounds with antioxidant, anti-inflammatory, and lipid-regulating properties. This meta-analysis assessed the potential of mulberry extract as an adjunctive treatment for metabolic risk factors linked to vascular dementia. We systematically reviewed randomized controlled trials (RCTs) published up to May 2025 that compared mulberry extract to placebo or standard care in adults with metabolic disorders. Fifteen trials including 1202 participants met the inclusion criteria. The primary outcomes were fasting glucose, fasting insulin, liver enzyme levels, lipid profiles, and inflammatory markers such as tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and high-sensitivity C-reactive protein (hs-CRP). The pooled results indicated that mulberry supplementation improved blood sugar control and lowered total cholesterol, low-density lipoprotein cholesterol (LDL), triglycerides, fasting blood glucose, glycosylated hemoglobin (HbA1c), homeostasis model assessment for insulin resistance (HOMA-IR), and inflammatory markers. Aspartate aminotransferase (AST) improved, whereas alanine aminotransferase (ALT) showed no significant change. Subgroup analyses revealed that greater benefits were associated with shorter treatment durations and doses below 500 milligrams per day. Furthermore, extracts from different parts of the mulberry plant showed varying effects on lipid and glucose metabolism. None of the included trials directly measured cognitive or neurovascular outcomes, so any potential neurovascular protection is inferred from changes in metabolic and inflammatory markers rather than demonstrated. In summary, these findings suggest that mulberry extract may be a promising complementary approach for managing metabolic risk factors in people at risk for VaD. However, further large-scale and rigorously designed studies are required to confirm its clinical benefits and to identify the most effective preparations.