The Algal Oil-based DHA Preparation for Children ecosystem spans controlled fermentation of microalgae to shelf-stable, flavored formats that integrate into children’s daily routines. Upstream centers on algal biomass producers, strain licensors, and oleaginous process engineers who convert sugars into DHA-rich lipids. Midstream covers oil extraction, winterization, deodorization, and microencapsulation performed by specialty ingredient houses, with analytical labs verifying ≥ 40% DHA content and < 5ppm heavy-metal thresholds. Downstream comprises brand owners, packagers, and omnichannel retailers that convert bulk oil into powders, gummies, and drops, positioning them through pediatric nutrition narratives. Value is created by translating algal carbon into stable, palatable omega-3 formats; it is captured by parties that secure certified feedstocks, achieve regulatory dossier acceptance, and control shelf-space access.