The partner in this Community Service Program is SMK TUNAS NUSANTARA, Industrial Chemistry Department in Jaten, Karanganyar. Students in this department do not yet have knowledge about waste-based technopreneur. One of the opportunities that can be taken is to produce nanocalcium herbs from chicken eggshells. Partners face several obstacles, namely: 1) Lack of knowledge of Industrial Chemistry SMK students about calcium; 2) Limited knowledge and skills in making nanocalcium herbal capsules; and 3) Lack of knowledge and skills related to food safety, packaging, and marketing. To overcome these problems, the Community Service program is carried out through: 1) Making herbal nanocalcium from eggshell; 2) Training on making nanocalcium herbal capsules; 3) Marketing management training. As a result, the partners succeeded in producing nanocalcium herbal capsules that are beneficial for bone health and now have the provision to become technopreneurs.
                        
                        
                        
                        
                            
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