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Adolescents are a nutritionally vulnerable group at risk of double burden of malnutrition. Riskesdas 2023 data showed that the prevalence of undernutrition in adolescents aged 13–15 years in North Sumatra reached 16.8%, while overweight and obesity reached 18.3%. The habit of consuming unhealthy snacks at school is one of the main preventable risk factors through structured nutrition education. Objective: This community service program aimed to increase knowledge of balanced nutrition and healthy snack selection behavior among Grade VIII students of SMP Negeri 19 Medan. Methods: Activities were carried out through interactive lectures, demonstrations, educational games, and workshops with 64 students. Evaluation used pre-test and post-test analysis with Wilcoxon Signed Rank Test. Results: There was a significant increase in nutritional knowledge in both classes (p=0.001) and healthy snack selection behavior (p=0.000). Conclusion: The Healthy Teen School program effectively improved adolescent nutrition knowledge and behavior.

Diarrhea is a common health problem among school-aged children. Factors influencing its occurrence include knowledge of healthy food and the habit of consuming snacks within the school environment. The objective of this research was to examine the relationship between knowledge of healthy food and snack consumption habits with diarrhea cases at SDN 81 Manado. This research employed a descriptive-analytic design with a cross-sectional approach. A total of 50 respondents were selected based on inclusion and exclusion criteria. Data collection was conducted using questionnaires addressing both variables. Statistical analysis was performed using the Chi-Square test with a significance level of ρ ≤ 0.05. The findings revealed that 35 respondents (75.0%) had poor knowledge of healthy food, and 32 respondents (64.0%) experienced diarrhea. Additionally, 42 respondents (84.0%) reported poor snack consumption habits, with 37 respondents (74.0%) experiencing diarrhea (29 males and 21 females). Chi-Square analysis produced a ρ-value of 0.001, which is lower than the alpha level (α = 0.05), indicating a significant relationship between knowledge of healthy food, snack consumption habits, and diarrhea cases. The study concludes that both knowledge of healthy food and snack consumption habits are significantly associated with diarrhea among school-aged children. Parental involvement is essential in educating children about healthy food choices as a preventive measure against diarrhea.

Diarrhea is a common health problem among school-aged children. Factors influencing its occurrence include knowledge of healthy food and the habit of consuming snacks within the school environment. The objective of this research was to examine the relationship between knowledge of healthy food and snack consumption habits with diarrhea cases at SDN 81 Manado. This research employed a descriptive-analytic design with a cross-sectional approach. A total of 50 respondents were selected based on inclusion and exclusion criteria. Data collection was conducted using questionnaires addressing both variables. Statistical analysis was performed using the Chi-Square test with a significance level of ρ ≤ 0.05. The findings revealed that 35 respondents (75.0%) had poor knowledge of healthy food, and 32 respondents (64.0%) experienced diarrhea. Additionally, 42 respondents (84.0%) reported poor snack consumption habits, with 37 respondents (74.0%) experiencing diarrhea (29 males and 21 females). Chi-Square analysis produced a ρ-value of 0.001, which is lower than the alpha level (α = 0.05), indicating a significant relationship between knowledge of healthy food, snack consumption habits, and diarrhea cases. The study concludes that both knowledge of healthy food and snack consumption habits are significantly associated with diarrhea among school-aged children. Parental involvement is essential in educating children about healthy food choices as a preventive measure against diarrhea.

School snacks are one of the food sources commonly consumed by elementary school children; however, they are at risk of microbiological contamination if not properly managed. One of the pathogenic bacteria that can contaminate food is Salmonella, which can cause diarrheal disease. This study aimed to analyze hygiene and sanitation factors of food handlers on Salmonella bacterial contamination in pentol snacks at elementary schools in Palang District, Tuban Regency. This study used an observational analytic design with a cross-sectional approach. The sample consisted of 20 pentol vendors and 20 pentol snack samples. Data were collected through observation using a hygiene and sanitation checklist and laboratory examination to detect the presence of Salmonella bacteria. Data analysis was initially planned using the Chi-square test; however, due to homogeneous results, the analysis was conducted descriptively. The results showed that most vendors had good hygiene and sanitation (85%) and sufficient (15%). Laboratory examination results showed that all pentol snack samples (100%) were negative for Salmonella bacteria. In conclusion, pentol snacks at elementary schools in Palang District were microbiologically safe from Salmonella contamination.

The development of digital technology has encouraged micro, small, and medium enterprises (MSMEs), particularly in the culinary sector, to adapt by utilizing online applications as a strategy to increase competitiveness. This community service activity aims to improve the understanding and capabilities of business owners at Kedai Jajanan Zahira in Surabaya in utilizing online applications as a marketing and sales tool. The method used in this study is Participatory Action Research (PAR), an approach that actively involves business actors in every stage of the process. These stages include problem identification, planning, implementation, and evaluation. Data collection techniques were carried out through interviews and direct observation to obtain a realistic picture of business conditions. The results of the activity showed an increase in business owners' understanding of the importance of digitalization, improved skills in using food delivery applications and social media, and increased market reach and interaction with consumers. In addition, the use of online applications also contributed to increased operational efficiency, such as more systematic order management and transaction recording. Overall, mentoring in the use of online applications has proven effective in increasing the competitiveness of culinary businesses. This activity has a positive impact not only on increasing sales, but also on business sustainability through increased digital literacy and the ability to adapt to technological developments. Therefore, ongoing mentoring is needed so that business actors can consistently optimize the use of digital technology in developing their businesses.

The consumption of snacks among school-aged children has become a serious concern in public health due to the widespread use of hazardous food additives such as formalin, borax, Rhodamine B, and excessive artificial sweeteners. These substances are commonly found in food sold around schools and have the potential to cause metabolic disorders, organ damage, and an increased risk of non-communicable diseases. The low level of knowledge among students, teachers, and canteen managers regarding food safety and balanced nutrition exacerbates this condition. This community service activity aims to increase students' knowledge about healthy snacks and encourage early detection through simple health checks. This program was conducted at SMP/SMA Al-Husna Kemiling, Bandar Lampung, involving 20 students, 4 teachers, and 1 canteen manager. The results of the activity show an increase in knowledge among 95% of participants after the education, based on the posttest results. Most participants experienced an increase in scores of 10–50 points from the pretest. The lecture method supported by teaching aids proved effective in helping students understand the material provided.

Background: Pentol is a round-shaped snack that is popular with elemtary school children with a savory taste, affordable price, and easy to find in the school environment. However, uncontrolled consumption of pentol raises concerns about fat and sodium chloride (NaCl) content. Objective: This study aims to determine the levels of fat and NaCl contained in pentol snacks sold at Tondo Urban Village Elementary School, PaluCity. Method: This study used a Complate Random Design (RAL) on five pentol samples in five elementary school in Tondo Village, with two repetitions. Fat content was analyzed by the Soxhlet method, While sodium chloride (NaCl) content was analyzed by Mohr titration. The data were analyzed using the Kruskal-Wallis test. Findings: The fat content in five pentol sampels at Tondo Urban Village Elementary School ranged from 2,16-4,75% (maximum SNI limit of 10%), while sodium chloride content was 1,55-2,15% (maximum SNI limit of 2,5%). Statistical tests (p=0,4>0.05) showed no significant difference between samples. Although still below the SNI limit, the fat and sodium content is quite high for school children’s snacks. Conclusion: The fat and NaCl content of pentol sancks at Tondo Urban Village Elementary School, Palu City is still below the SNI limit, but the consumption of these snacks need to be limited. Implications: it is hoped that there will be further researchers who analyzed carbhohydrates, proteins and other additives such as preservatives in pentol snacks.        

Food safety is an important issue in the prevention of food-borne diseases because contaminated food can cause diseases such as diarrhea, typhoid fever, and food poisoning. Snack food vendors, as direct food handlers, have an important role in maintaining food hygiene and sanitation. Research Objective: To know the description of the sanitary hygiene behavior of snack food vendors in Jakabaring Sport City, Palembang City in 2025. Research Methods: This type of research is descriptive research. The population in this study is all snack food traders around the Jakabaring Sport City lake, Palembang City. The sample in this study was 36 people. The data collection tool is the questionnaire sheet. Data analysis was carriedout by univariate analysis. Research Results: The results of this study show that the characteristics of respondents based on gender are male (25.0%) and female (75.0%), young age < 47 years old (41.5%) and old age ≥ 47 years old (51.8%), the last education of elementary and junior high school is (52.8%) and high school-college (47.2%). Respondents' knowledge was not good (66.7%) and good (33.3%),respondents' attitudes were negative (36.1%) and positive (63.9%), respondents' actions were not good (55.6%) and good (44.4%). Conclusion: Although most traders have a positive attitude towards sanitation hygiene, the low knowledge and inappropriate actions indicate the need for regular education and supervision efforts to improve sanitation hygiene behavior among snack food traders.