Wow, this manufacturing deep dive is no joke. I've been obsessed with vitamin D3 sourcing after hearing about synthetic vs. natural methods. The lichen-based vegan D3 seems better, but I'm skeptical about extraction solvents. Same with magnesium citrate, where the citric acid can come from fermented GMO corn. It's exhausting but necessary to trace every ingredient back to its origin. We're basically becoming amateur chemists to avoid corporate shortcuts.