This clinical trial inestigates the effects of transcranial direct current stimulation (tDCS) on anxiety symptoms in adult women with clinically relevant anxiety levels. The intervention involves the application of low-intensity electrical current over the left dorsolateral prefrontal cortex (DLPFC) across twenty consecutive sessions. Participants are randomly assigned to either an active or sham stimulation group in a double-blind design. The study aims to evaluate changes in anxiety symptoms, emotional regulation, and physiological and molecular markers, including EEG activity, heart rate variability (HRV), and salivary levels of cortisol and interleukin-6 (IL-6) plasma. The findings are expected to support the development of complementary, low-cost, and non-pharmacological strategies for anxiety management.
Inclusion Criteria: * Adults under the age of 18; * GAD-7 ≥ 10 * Possibility of being present on previously agreed days. Exclusion Criteria: * Being in psychopharmacological treatment for depression; * HAM-D≥23 scale; * have a self-reported severe disorder (psychosis, schizophrenia, substance abuse, major depression); * having had seizures and epilepsy; * having presented substance use disorder (except Tobacco) in the last 6 months or Suicidal Ideation in the last 6 months; * being pregnant or breastfeeding; * have suffered any type of brain injury or surgery, heart disease or cranial defect.