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Short answer: Hydrogenated soy phosphatidylcholine (HSPC) is a mixture of saturated phosphatidylcholines, with DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine) and DSPC (1,2-distearoyl-sn-glycero-3-phosphocholine) as the major components. DSPC is one of the key constituents, but the exact ratio of DPPC to DSPC varies by supplier and batch. - In many commercial HSPC preparations, DPPC and DSPC are present in roughly comparable amounts, but the exact percentages are supplier- and lot-dependent. - Some sources may have slightly more of one species than the other; there isn’t a universal fixed composition. If you need a precise composition for a specific product, check the supplier’s certificate of analysis (CoA) or technical datasheet. If you tell me the supplier or lot, I can help interpret the numbers.
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