Medium-chain triglycerides are mixtures of triglycerides formed by the esterification of saturated fatty acids such as caprylic acid and capric acid with glycerol, appearing as colorless to slightly yellow, clear oily liquids.
Egg yolk lecithin is a natural phospholipid mixture extracted and refined from egg yolk, with phosphatidylcholine (PC) and phosphatidylethanolamine (PE) as the main components. It appears as an off-white or pale-yellow powder or block-like solid and feels slightly slippery to the touch.
Soybean oil is a fatty oil refined from the seeds of soybeans, a leguminous plant, through a multi-stage purification process, resulting in a pale yellow, clear liquid. The quality standards for pharmaceutical-grade injectable soybean oil are even more stringent.