Sulfur assimilation is a process through which organisms, including plants and animals, obtain sulfur and utilize it for various biological processes. Synonyms for sulfur assimilation include sulfur metabolism, sulfur utilization, sulfur acquisition, and sulfur absorption. In plants, sulfur assimilation is essential for the synthesis of amino acids such as cysteine, methionine, and glutathione. In animals, sulfur assimilation is important for the production of various sulfur-containing compounds, including keratin in hair and nails, and cartilage in joints. Sulfur assimilation is a critical process for the proper functioning of living organisms, and the various synonyms for this term highlight the importance of sulfur in biological systems.