Luckily, there are plant sources of D3 out there. The ideal option, according to Ferira, is algae. “Organic algal-sourced vitamin D3 is the cream of the crop for vitamin D,” says Ferira.
Though harder to find, algal-sourced vitamin D3 can make for a supplement that’s both sourced from plants and more sustainable.
VegD3®, for example, is a non-GMO, USDA organic, plant-origin, environmentally sustainable algal vitamin D3 option that’s chemically identical to the D3 you’d get from the usual animal-based lanolin. The process of creating this algae-based vitamin D3 is also free of pesticides (something that can’t always be guaranteed