# Nutritional deficiency health concerns > Live situation record from CLSTR: https://clstr.news/situations/nutritional-deficiency-health-concerns > Updated: 2026-08-26T04:00:52.000Z. Sources: 5. Developments: 2. Health concerns regarding nutritional deficiencies, specifically Vitamin D and Vitamin B12, have been highlighted. In Germany, the German Nutrition Society (DGE) reports that nearly 60 percent of the population fails to reach recommended Vitamin D blood levels, with high-risk groups including the elderly, infants, and individuals with darker skin or limited sun exposure. Vitamin B12 deficiency also affects approximately 10 percent of the German population and 25 percent of those over age 65. Because B12 is primarily found in animal products, the DGE suggests supplementation for vegetarians and vegans. Regarding Vitamin D, the Spanish Society of Endocrinology and Nutrition (SEEN) states that optimal levels should remain above 30 nanograms per milliliter. Prolonged deficiency can result in serious conditions such as rickets in children and osteomalacia in adults, characterized by poor bone mineralization and pain in the spine, ribs, or pelvis. ## Timeline ### 2026-08-26: Vitamin D deficiency: Symptoms, consequences, and prevention Vitamin D deficiency can lead to serious conditions like rickets and osteomalacia. Maintaining optimal levels is crucial for bone health, muscle function, and immune support. 2 sources. https://clstr.news/cluster/vitamin-d-deficiency-symptoms-consequences-and-prevention ### 2026-08-23: Nutritional deficiencies in Vitamin D and B12 identified as widespread concerns Reports highlight widespread Vitamin D and B12 deficiencies. Key risk factors include age, diet, and skin pigmentation, with specific nutritional guidelines provided for different life stages. 2 sources. https://clstr.news/cluster/nutritional-deficiencies-in-vitamin-d-and-b12-identified-as-widespread-concerns --- Cite as: Nutritional deficiency health concerns. CLSTR, https://clstr.news/situations/nutritional-deficiency-health-concerns