Problem-Based Learning in Vitamin Chemistry to Improve Students' Nutrition Information Interpretation Skills Rahmaliani Fauziah, Imelda Helsy, Riri Aisyah, Risa Rahmawati Sunarya, Eli Rohaeti Jurnal Pendidikan Kimia FKIP Universitas Halu Oleo Vol. 11 No. 2 2026 DOI 10.36709/jpkim.v11i2.234