A Natural Additive Alternative to the Cosmetics Industry: Hazelnut and Its Waste Products

Background: Today, individuals tend to use natural products instead of synthetic additives in many areas. The hazelnut tree produces by-products and fruit. Nuts their are rich bioactive compounds. Objectives: This study investigated the biological activities water ethanol extracts obtained from its waste determine potential usage cosmetic industry. Methods: In this experimental study, disc diffusion test, minimal inhibitory concentration (MIC), bactericidal (MBC), or minimum fungicidal (MFC) were applied evaluate antimicrobial extracts. sun protection factor (SPF) commercial cream + extract mixtures was determined vitro. addition, formulations containing Limosilactobacillus fermentum MA-7 probiotic candidate lactic acid bacteria human milk developed for pharmaceutical industry prevent infections. good test against microorganisms activity. Results: husk methanol had highest inhibition zone diameter (19.41 mm) Yersinia ruckeri. MIC, MBC, MFC ranged 1.25 > 40 µg/µL. SPF values (range: 6.85-27.64) 11.92-26.28) vitro obtain sunscreens. groups probiotics showed a high effect on tested microorganisms. results statistical analysis indicated that pellet supernatant group statistically significant (P < 0.05) compared other groups. Conclusions: hazelnuts have be used as source antimicrobials. Hazelnut can an alternative antimicrobials sunscreens substance. it might contribute country’s economy by evaluating resulting processing