خميسي بالمنقعسوسى آسيارداد صفاء2025-06-252025-06-252025ماستر ،2025 . قسم الفلاحة ، كلية علوم الطبيعة و الحياة ، جامعة الوادي .https://dspace.univ-eloued.dz/handle/123456789/38328التنوع الحيوي وفيزيولوجيا النباتIn the history of alternative medicine, medicinal plants have held a prominent position, contributing effectively to the treatment of various diseases, particularly those related to liver function disorders. In this context, the present study was conducted to assess the positive and negative effects of medicinal plants used in the treatment of liver diseases. To achieve the study objectives, a field survey was carried out through the distribution of questionnaires to a sample of the population in southeastern Algeria (El Oued – Touggourt). The survey results showed that the most commonly used plant for liver diseases was milk thistle (Silybum marianum) (21%), followed by turmeric root (12%)(Curcuma longa), and dandelion root (11%)(Taraxacum officinale ). As for the most commonly used plant parts, the leaves were reported in 26% of cases, followed by seeds (20%) and roots (19%). Regarding the form of preparation, plant powder was the most frequently used (56.55%), while extracted oil recorded the lowest usage rate (9.9%). With respect to the physiological effects resulting from the use of these plants, 95% of participants reported healing, while 4% experienced disease progression. This indicates a clear effectiveness of the medicinal plants used in this study in alleviating liver disorders. Concerning the evaluation of therapeutic efficacy, 57% of participants rated it as good, 20% as excellent, and 23% as moderate. These results support the existence of significant positive effects of medicinal plants in this field, with limited adverse effects reported.en-USLiver disordersMedicinal plantsPositive and negative effectsEl Oued – Touggourtmaster