Slaughterhouse blood is an inevitable part of the meat production food chain and represents a rich source of protein. The physicochemical characteristics and utilization of animal blood in various food and industrial applications has been well explored. However, in recent years much attention has been paid to the generation of peptides with biological activities from food by‐products including blood. This review examines the angiotensin‐converting enzyme inhibitory, antioxidant, antimicrobial, and other bioactive peptides derived from various slaughterhouse animal blood sources. Furthermore, the effect of enzyme choice, degree of hydrolysis, and peptide sequence or size on the potency of these bioactivity is discussed.

For several decades, there has been considerable interest in marine‐derived long chain n‐3 fatty acids (n‐3 LCPUFAs) due to their outstanding health benefits. n‐3 LCPUFAs can be found in nature either in triglycerides (TAGs) or in phospholipid (PL) form. From brain health point of view, PL n‐3 is more bioavailable and potent compared to n‐3 in TAG form, as only PL n‐3 is able to cross the blood–brain barrier and can be involved in brain biochemical reactions. However, PL n‐3 has been ignored in the fish oil industry and frequently removed as an impurity during degumming processes. As a result, PL products derived from marine sources are very limited compared to TAG products. Commercially, PLs are being used in pharmaceutical industries as drug carriers, in food manufacturing as emulsifiers and in cosmetic industries as skin care agents, but most of the PLs used in these applications are produced from vegetable sources that contain less (without EPA, DPA, and DHA) or sometimes no n‐3 LCPUFAs. This review provides a comprehensive account of the properties, structures, and major sources of marine PLs, and provides focussed discussion of their relationship to brain health. Epidemiological, laboratory, and clinical studies on n‐3 LCPUFAs enriched PLs using different model systems in relation to brain and mental health that have been published over the past few years are discussed in detail.

Marine shell waste is a very rich source of several bioactive compounds and materials, such as calcium, chitin, pigments, and proteins. Currently, this waste material is greatly underutilized and contributes to significant environmental problems due to off-odor and concentration of minerals in landfill. The main objective of this review is to highlight the potential to add value to and maximize the utilization of this waste stream. Therefore, this review provides up-to-date information on various compounds available in marine shells that are generated as waste coproduct from commercial processing operations and their potential uses. Methods are described for extraction of these compounds for use in food and pharmaceutical applications.