Caffeine 250mg/2ml / Sodium benzoate 250mg/2ml solution for injection ampoules

This study aimed to explore the effects of acute ingestion of caffeine capsules on muscle strength and muscle endurance. We searched the PubMed, Web of Science, Cochrane, Scopus, and EBSCO databases. Data were pooled using the weighted mean difference (WMD) and 95% confidence interval. Fourteen studies fulfilled the inclusion criteria. The acute ingestion of caffeine capsules significantly improved muscle strength (WMD, 7.09, p p p p p p p p < 0.00001). An acute ingestion of caffeine capsules significantly improved muscle strength and muscle endurance in the upper body and lower body of males.

Abstract licence: CC BY

Anxiety and depression are the most prevalent mental illnesses in the contemporary world. Several animal models have been developed to understand the cellular and molecular mechanisms underlying these disorders and the effect of drugs in modulating the associated behavioral responses. Neuroinflammation has been related to mood disorders. Caffeine is a psychoactive substance that acts as a nonspecific blocker of adenosine receptors. Adenosine receptors are present in neurons and glial cells in different brain areas that are involved in controlling anxiety and depression. However, depending on the context, caffeine can exacerbate or inhibit neuroinflammation and behavioral responses associated with these conditions. This systematic review aimed to evaluate the effects of caffeine and related xanthines on neuroinflammation observed in rodent models of anxiety and depression. A systematic database search (PROSPERO CRD42024517989) returned 17 eligible studies, separated based on the animal model. Most of the analyzed studies revealed that caffeine led to a beneficial effect, mitigating anxiety and depressive-like behaviors and possible cognitive impairments induced by stress. In addition, it also reversed oxidative damage and neuroinflammation by reducing levels of pro-inflammatory cytokines such as IL-1ß, TNF-alpha, and IL-6 and inhibiting glial cell activation. Together, these data reveal a robust effect of caffeine in alleviating symptoms for individuals with these disorders, even though the doses and routes of caffeine administration were highly variable among eligible studies. In addition, they advance the identification of cellular and molecular mechanisms underlying these effects.

Abstract licence: CC BY-NC-ND

Introduction: Caffeine is a widely consumed psychoactive compound whose central pharmacological effects are mediated primarily through antagonism of adenosine receptors. Wakeful EEG provides a temporally sensitive method for examining caffeine-related changes in oscillatory activity and vigilance-related brain states. This systematic review synthesized evidence concerning the effects of acute and habitual caffeine exposure on non-ERP EEG measures during wakefulness. Materials and Methods: The review followed PRISMA 2020 guidelines. PubMed/MEDLINE, Scopus, Web of Science, Embase, PsycINFO, and the Cochrane Library were searched from database inception to 30 May 2026. Eligible studies included human participants exposed to caffeine, coffee, or caffeine-containing interventions and reported EEG outcomes during wakeful resting-state or task-related conditions. Risk of bias was assessed using RoB 2 for randomized trials and ROBINS-I for non-randomized studies. Findings were synthesized narratively because of substantial methodological heterogeneity. Results: Forty-eight studies were included. Resting-state spectral EEG was the dominant paradigm, although studies also examined task-related activity, prolonged wakefulness, sleep deprivation, withdrawal, driving-related drowsiness, coherence, nonlinear complexity, EEG microstates, and multimodal EEG-fMRI measures. Reductions in alpha power or amplitude were among the more frequently reported findings following acute caffeine administration, while attenuation of theta, delta, or other slow-frequency activity was particularly evident under conditions of sleep pressure, prolonged wakefulness, withdrawal, fatigue, or reduced vigilance. However, neither effect was universal. Beta findings were heterogeneous, and changes in alpha frequency, total EEG power, coherence, asymmetry, complexity, and microstates were less consistently examined. The direction and magnitude of EEG responses varied according to caffeine dose, habitual intake and withdrawal status, baseline vigilance, eye condition, task demands, participant characteristics, scalp region, frequency-band definition, and EEG methodology. Evidence concerning coherence, asymmetry, nonlinear complexity, microstates, and multimodal EEG-fMRI outcomes was preliminary. Conclusions: The available evidence does not establish a single reproducible EEG signature or validated electrophysiological biomarker of caffeine response. Reductions in alpha power and attenuation of slow-frequency activity during states of elevated sleep pressure or caffeine withdrawal were among the more frequently reported findings, but substantial methodological and state-dependent heterogeneity limits their specificity and generalizability. EEG changes should also not be interpreted as direct indicators of improved cognitive performance, because electrophysiological and behavioral effects were not consistently concordant across studies.

Abstract licence: CC BY

Sodium bicarbonate positively impacts performance, but its associated gastrointestinal symptoms (GIS) may limit use. This systematic review synthesized literature that has evaluated GIS with sodium bicarbonate supplementation. Literature searches were performed from February 2024-March 2026. Eligible studies provided ≥ 5 g of sodium bicarbonate within a 24-h period or, if a multi-day protocol, at least one day involving ≥ 5 g. Included studies had a placebo group/condition or a comparison group/condition that created a contrast related to delivery method, form, or dose. In total, 101 investigations were summarized in six categories: acute single dosing (n = 35); acute spread dosing (n = 28); chronic dosing (n = 7); acute versus chronic dosing (n = 5); delivery form (n = 18); and other (n = 8). Existing literature suggests that common acute doses (0.2-0.4 g/kg) elicit mild-to-severe GIS, which likely increase in a dose-dependent manner when sodium bicarbonate is ingested in a single dose. Strategies to reduce GIS with acute dosing include spreading intake over hours, using enteric-coated capsules/tablets, and ingesting sodium bicarbonate mini-tablets within a carbohydrate hydrogel. Direct comparisons of these strategies to reduce GIS are absent in current literature; thus, ranking their effectiveness is not possible. Multi-day dosing may lessen GIS, but symptom documentation throughout supplementation periods is poorly characterized. Notably, 26 of 101 studies failed to perform inferential statistical testing to examine condition/group differences in GIS. Making definitive recommendations about sodium bicarbonate supplementation to minimize GIS remains challenging. Major needs remain for direct comparisons between protocols purported to reduce GIS and improvements in GIS data collection, reporting, and analysis.

Abstract licence: CC BY-NC

BackgroundMale pattern hair loss is the most common form of hair loss in men, occurring in specific patterns. Contributing factors include hormonal changes, stress, malnutrition, and insufficient blood microcirculation.ObjectiveTopical applied dimethylglycine sodium salt (DMG-Na) has been identified to increase skin microcirculation by activating endothelial nitric oxide synthase and inducing nitric oxide production. Given the importance of sufficient microcirculation on hair growth, the goal of this study was to evaluate the effectiveness of topically applied DMG-Na in combination with caffeine against male pattern hair loss.MethodsA 24-week, double-blind, randomized, placebo-controlled trial was conducted on 154 men with male pattern hair loss, treated with a DMG-Na and caffeine-containing shampoo or the corresponding placebo. The primary efficacy parameter was the change in the number of hairs pulled via hair pull test from baseline to 6 months of daily product application. Clinical efficacy was further evaluated via phototrichogram analysis on a subgroup of 30 subjects.ResultsThe decreased number of hairs pulled during the hair pull test after 6 months of active shampoo application was significantly higher compared to the placebo (-2.8 ± 1.6 vs. 0.6 ± 2.2; p ConclusionThe clinical efficacy of this novel DMG-Na and caffeine-containing shampoo demonstrates significant potential against male pattern hair loss, offering promising results without any undesirable side effects.

Abstract licence: CC BY

Consumption of caffeine in the diet, both daily and occasional, has a significant biological effect on the nervous system. Caffeine, through various and not yet fully investigated mechanisms, affects headaches. This is especially noticeable in migraine. In other headaches such as hypnic headache, post-dural puncture headache and spontaneous intracranial hypotension, caffeine is an important therapeutic agent. In turn, abrupt discontinuation of chronically used caffeine can cause caffeine-withdrawal headache. Caffeine can both relieve and trigger headaches.

Abstract licence: CC BY