Snail mucin is one of the animal products widely used in cosmetic products. The mucus of Cornu aspersum (C. aspersum) contains compounds that have antibacterial, antioxidant, proliferative, pro-migration, angiogenesis-promoting, and other biological effects. This study aimed to critically analyze and consolidate existing data on the bioactive components of C. aspersum mucus and the mechanisms of their influence on human health, fo cusing mainly on its cosmetic, regenerative, anti-inflammatory, and antimicrobial proper ties. We conducted a literature search analysis on this problem using the following search databases in English: PubMed, PubChem, Mendeley, Google Scholar, Scirus, DOAL, BASE, CORE, Science.gov, and RefSeek up to August 12, 2025. It was shown that snail mucus facilitates wound healing, which could be the prerequisite for the development of innovative formulations for the adjuvant therapy of skin wounds. However, there are problems with the standardization of snail mucus because of the absence of single quality indexes, their limits, and the complicated structure of snail mucins. Moreover, there is a lack of clinical randomized trials evaluating the safety and efficacy of C. aspersum snail 
mucus. In conclusion, snail mucus's biological effects deserve further investigation and pave the way for further studies of its potential as a raw material for pharmaceutical products, including the chemical structure of the still unknown molecules, its standardization, nonclinical and clinical studies, and further studies of snail mucus for its usage in cosmetology. 
Keywords: Cornu aspersum mucus; mucin; snail secretions; cosmetology; wounds

In the current economic conditions, an active search is conducted for cost-effective and well-balanced feeds and feed mixtures for fish farming. The development of functional feeds using biomass of wild algae is becoming a central focus in the fish feed production. Although these supplements offer a promising path to sustainable and environmentally friendly fish feeding, their impact on the ecosystem requires detailed research. The aim of the study was to determine the acute response of Daphnia magna to the influence of new feed products derived from the  wild algae of the Baltic Sea, phycocyanin on its own, and their binary mixture. The study was conducted using the standard aquatic toxicology method. To establish the  48-hour LC50, the  probit analysis method was used. The results showed that D. magna is more sensitive to the effects of phycocyanin, with the following order of toxicity: phycocyanin > the mixture (1:1) > the biomass of Cladophora sp. The median lethal concentrations at 48 h were 100 mg/l, 920 mg/l, and 1720 mg/l, respectively. The obtained data allows to refer the tested compounds to low-hazard substances according to the Globally Harmonized System (GHS). The observed effects were compared with the effects of the mixture noticed in the toxic units (TU) model. In 48 hours, the mixture of the dry biomass of
Cladophora sp. and phycocyanin at a ratio of 1:1 exhibited synergism. The obtained results will allow choosing the optimal ratio of the raw materials used in fish feeds without inflicting harm to the aquatic ecosystem and loss of their nutritional value.