You can find iron in many foods, including red meat, poultry, fish, beans, and leafy green vegetables
According to two studies analysing the evidence on B12 in plant-based foods, only the seaweeds hijiki, nori and chlorella, mushrooms, a few non-common plants and a type of fermented soya yoghurt contained some all due to bacterial activity but amounts vary with some of the samples containing no B12 (Watanabe and Bito, 2018
also showed taurine decreased cholesterol by enhancing the activity of cholesterol 7-alpha monooxygenase, a rate-limiting enzyme in bile acid synthesis and stimulated bile acid production (Murakami et al., 1996)
Residual-Solvent Testing Appropriate gas-chromatography or other validated methods should assess solvents used during synthesis and purification