ABSTRAK Stunting merupakan gangguan pertumbuhan dan perkembangan anak karena kekurangan makanan bergizi, sering sakit, atau kurang stimulasi. Kekurangan protein dan mikronutrien, termasuk kalsium, merupakan faktor risiko utama stunting. Berdasarkan data tahun 2014 menunjukkan bahwa 23,8% anak di seluruh dunia dan 33,5% anak di negara-negara berkembang mengalami stunting atau pertumbuhan terhambat. Di Indonesia, berdasarkan hasil Riset Kesehatan Dasar tahun 2013, prevalensi stunting pada remaja mencapai 35,1%. Provinsi Jawa Timur prevalensi stunting pada remaja mencapai 31,1%, sebanyak 10,8% dikategorikan sangat pendek dan 20,3% lainnya dikategorikan pendek. Pemeriksaan kalsium darah pada remaja awal sangat penting karena kalsium tidak hanya penting untuk pertumbuhan tulang, tetapi juga berperan dalam berbagai fungsi tubuh lainnya, seperti kontraksi otot, transmisi saraf, dan pembekuan darah. Dengan melakukan pemeriksaan secara rutin, kekurangan kalsium dapat dideteksi dini dan segera diberikan pencegahan yang tepat. Tujuan dari kegiatan ini adalah untuk meningkatkan pengetahuan tentang pentingnya gizi seimbang sejak dini, terutama terkait dengan peran kalsium dalam pertumbuhan tulang. Manfaat pemeriksaan kadar kalsium darah, diharapkan dapat mendeteksi potensi risiko stunting pada generasi mendatang dan mendorong remaja untuk melakukan gaya hidup sehat. Kegiatan ini di laksanakan di SMAN 1 Dukupuntang, Dukupuntang, Kabupaten Cirebon. Pelaksanaan kegiatan PKMD ini pada tanggal 02 September 2024 sampai tanggal 09 September 2024. Hasil pemeriksaan kadar kalsium darah pada seluruh responden (48 orang) menunjukkan bahwa 100% memiliki kadar kalsium di bawah normal. Kata Kunci: Stunting, Remaja, Kalsium Darah ABSTRACT Stunting is the impaired growth and development of children due to lack of nutritious food, frequent illness or lack of stimulation. Protein and micronutrient deficiencies, including calcium, are major risk factors for stunting. Based on 2014 data, 23.8% of children worldwide and 33.5% of children in developing countries experience stunting or stunted growth. In Indonesia, based on the results of the Basic Health Research in 2013, the prevalence of stunting in adolescents reached 35.1%. In East Java, the prevalence of stunting in adolescents reached 31.1%, with 10.8% categorized as very short and 20.3% categorized as short. Checking blood calcium in early adolescents is very important as calcium is not only essential for bone growth, but also plays a role in various other bodily functions, such as muscle contraction, nerve transmission, and blood clotting. By conducting regular checks, calcium deficiency can be detected early and appropriate prevention can be given immediately. The purpose of this activity is to increase knowledge about the importance of balanced nutrition from an early age, especially related to the role of calcium in bone growth. Through checking blood calcium levels, it is expected to detect the potential risk of stunting in future generations and encourage adolescents to adopt a healthy lifestyle. This activity was carried out at SMAN 1 Dukupuntang, Dukupuntang, Cirebon Regency. The implementation of this PKMD activity was on September 02, 2024 to September 09, 2024. The results of checking blood calcium levels in all respondents (48 people) showed that 100% had calcium levels below normal. Keywords: Stunting, Adolescents, Blood Calcium