BELMOKHTAR, AbderrahimCHERIF, Nadjib2025-07-142025-07-142025http://dspace.univ-temouchent.edu.dz/handle/123456789/6659Ulva lactuca algae, also known as sea lettuce, is an edible green algae widely appreciated in Europe and Asia for its numerous nutritional benefits. It is a valuable source of vitamins (particularly vitamins A, C, and B12) and essential minerals such as calcium, magnesium, iron, and zinc. Moreover, Ulva lactuca is naturally rich in antioxidants, amino acids, and dietary fiber, making it a functional food that supports immune system strengthening and helps prevent various diseases. In this work, Ulva lactuca has been utilized in the formulation of natural nutritional supplements, free from synthetic chemicals. This potential has been further enhanced by the addition of extracts from medicinal plants such as ginger (Zingiber officinale), turmeric (Curcuma longa), and fenugreek (Trigonella foenum-graecum). Each of these plants possesses well-documented beneficial properties: ginger and turmeric exhibit anti-inflammatory and antioxidant effects, while fenugreek is known for its ability to regulate blood sugar levels in type 2 diabetic patients and to reduce blood cholesterol levels. Thus, the synergistic combination of Ulva lactuca with these medicinal plants enables the development of innovative, natural, and effective nutritional supplements, offering a promising approach for the prevention and management of metabolic disorders and for the maintenance of overall health.frThesis