The present volume 4 of the book series "Natural Products: Research Reviews" provides the readers with recent information/achievements and about future directions on the subject. The book comprises twenty two review articles, focuses on the potential applications of a diverse group of natural sources prominent among which are as follows: -Anticancer Properties of Anthocyanidins -Camellia sinensis (L.) Kuntze: Chemical and Nutraceutical Properties -Screening of Silver Nanoparticle Synthetic Efficacy of Some Medicinal Plants -Chemical Diversity, Pharmacological, Nutritional and Therapeutic Novelty of Marine Derived Products: An Infinite Natural Resource -Nutritional and Phytomedicinal Potential of Prunus avium L. -Phytochemical Composition and Different Biological Activities of Alpinia spp. -Treatment of Male and Female Sexual Dysfunctions by Some Natural Herbs -Role of Diet for Management of Anxiety Disorders -Therapeutic Potential of Yarrow (Achilla millefolium) Linn. -Phyto-pharmacological Aspects of Two Hypericum Species -Modified Polysaccharides: Its Needs, Approaches and Applications in Drug Delivery -In vitro Micropropagation and Phytochemical Screening of Oroxylum indicum -Assesement of Genotoxic and Genoprotective Profile of Some Commonly Used Herbal Medicines -Use of Mucilage from Yam (Dioscorea spp.) Tuber for Biotechnological Applications -Natural Aspects of Medicinal Plant Codiaeum variegatum -Diabetic Skin Wound Healing and the Use of Medicinal Plants -Pterocarpus marsupium Roxb. - An Important Medicinal Plant -Digera muricata (L.) Mart: A Versatile Medicinal Plant -Biological Properties of Smilax chinensis Linn. The book is not only an excellent source material for the scientists and teachers but also for research workers working on different aspects of Natural Products. It is hoped the present volume will attract wide acceptance of pharmacologists, phytochemists, medical personals in particular and a host of other scientists and biologists to facilitate further research on natural products.