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Adolescents are a group aged 10-18 years who need various nutrients. Adolescents need more nutrients, because it is a transition period from childhood to adulthood. Assessment and monitoring of adolescent nutritional status needs to be done to prevent nutritional and health problems in adulthood. This community service was carried out on 11 female adolescents who were willing to undergo nutritional status screening. The activities to be carried out include measuring hemoglobin (Hb) levels, measuring upper arm circumference (LiLA), and providing education about adolescent nutrition. The results of the activity obtained an increase in participant knowledge about nutritional status after being given education, there were 2 participants who had anemia with Hb examination results <12g/dL and there were 3 participants who had LiLa <23.5 cm. Participants already understand and are able to perform Hb examinations using the Easy Touch GCHb tool and LiLA measurements.

Anaemia is a common medical condition characterised by a lack of red blood cells or a decrease in haemoglobin levels below normal, which is important for the distribution of oxygen in the body. This disorder has a significant impact on global health, especially in the elderly, pregnant women, and individuals with chronic diseases. Anaemia in women of reproductive age poses a severe health challenge, causing more than 115,000 maternal deaths each year. This activity uses the PDCA (Plan-Do-Check-Act) method to screen for anaemia by measuring haemoglobin and hematocrit levels in the productive age population at PT. Narindo, North Jakarta. The examination results showed that 38 people (28.57%) men and 5 people (3.97%) women had anemia. Routine screening, especially in high-risk populations, is critical for early identification and timely intervention, thereby reducing complications and health care costs. Efficient management through nutritional and pharmacological interventions can improve the quality of life and productivity of individuals suffering from anemia, thereby reducing the wider socio-economic impact.

The World Health Organisation (WHO) estimates that the global population aged over 60 years will increase from 900 million in 2015 to 2 billion in 2050. This demographic is particularly vulnerable to disease and disability, with declining haemoglobin levels long considered a consequence of aging. Nutritional deficiencies, chronic diseases, kidney disease, haematological malignancies, and anemia of unknown cause can all contribute to anemia in the elderly. This significantly impacts physical performance, cognitive function, and overall health. We carried out this activity at St. Francis Assisi, Jakarta, with 36 participants. We perform a physical examination and a complete blood count, including haemoglobin and hematocrit levels, to detect nemia. Among the 36 participants, 18 people (50%) had mild anaemia, 6 people (16.7%) had moderate anaemia, and 1 person (2.8%) had very severe anaemia. Anaemia in the elderly can cause severe health consequences, including physical and cognitive decline, increased hospitalisations, and death. Routine screening for haemoglobin and hematocrit levels is essential for early detection and intervention, improving quality of life and health outcomes for older adults.