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Turmeric (Curcuma longa L.) is a popular natural drug, traditionally used for the treatment of a wide range of diseases. Its root, as its most popular part used for medicinal purposes, contains different types of phytochemicals and minerals. This review summarizes what is currently known on biochemistry, safety, pharmacological activities (mechanistically), and clinical applications of turmeric. In short, curcumin is considered as the fundamental constituent in ground turmeric rhizome. Turmeric possesses several biological activities including anti-inflammatory, antioxidant, anticancer, antimutagenic, antimicrobial, antiobesity, hypolipidemic, cardioprotective, and neuroprotective effects. These reported pharmacologic activities make turmeric an important option for further clinical research. Also, there is a discussion on its safety and toxicity.

As potential agents for preventing different oxidative stress-related diseases, phenolic compounds have attracted increasing attention with the passage of time. Intake of fruits, vegetables and cereals in higher quantities is linked with decreased chances of chronic diseases. In plant-based foods, phenolic compounds are very abundant. However, bio-accessibility and biotransformation of phenolic compound are not reviewed in these studies; therefore, a detailed action mechanism of phenolic compounds is not recognized. In this article, inclusive concept of different factors affecting the bioavailability of phenolic compounds and their metabolic processes is presented through which phenolic compounds go after ingestion.

Honey is a natural domestic sweet food material and a chemically diverse superfluous product of nectar acquired from flowers. Owing to the presence of higher amounts of antioxidant compounds covering phenolic, enzymes, organic acids, and bioactive peptides, it holds a strong ability to prevent various maladies. In addition, honey has also been exploited in certain cardiovascular, gastrointestinal, neoplastic, and inflammatory states along with its role in the treatment of copious infections and surgical wounds. Flavonoids and polyphenols are important bioactive components present in honey and have antioxidant properties. Some bioactive compounds, for example luteolin, galangin, isorhamnetin, quercetin, and kaempferol, are present in honey. Phenolic acids and flavonoids have important pharmacological activities such as anti-allergic, anti-biotic, anticarcinogenic, and hypoglycaemic. Moreover, curative potential of bioactive components and their utilisation in value added food products are also the limelight of this article. ARTICLE HISTORY

Background: Seaweeds including marine brown algae are traditional food sources in Asia. Phlorotannins, as the product of polyketide pathway, are mainly found in brown algae. Different properties have been attributed to this group of marine products ranging from anti-allergic to anticancer activity. Mechanism of action is not obvious for all these properties, but there are some explanations for such effects. Objective: The aim of the current study was to review the phlorotannins and to assess the beneficial uses in medicine. Methods: Different databases were explored with the exact terms “Phlorotannin”, “Seaweed” and “Brown Algae”. Data assembly was finalized by June 2019. The papers showing the effects of phlorotannins in medicine were gathered and evaluated for further assessment. Results: General physiological aspects of phlorotannins were firstly evaluated. Different arrays of pharmacological properties ranging from anti-diabetic activity to cancer treatment were found. The mechanism of action for some of these beneficiary properties has been confirmed through rigorous examinations, but there are some features with unknown mechanisms. Conclusion: Phlorotannins are characterized as a multifunctional group of natural products. Potential antioxidant characteristics could be attributed to preventive and/or their curative role in various diseases.