Vitamin D Market By Type (Vitamin D2, Vitamin D3), By Source (Animal-Based, Plant-Based, Synthetic), By Form (Powder, Liquid, Softgels & Tablets, Capsules), By Application (Dietary Supplements, Functional Foods & Beverages, Pharmaceuticals, Animal Feed), By End-User (Infants, Children, Adults, Geriatrics), and By Distribution Channel (Online Sales, Offline Sales); Global Insights & Forecast (2024 – 2030)