Functions and Applications of Compound Phosphates (Are Compound Phosphates Harmful to Human Health?)

outline: Food additives have now become virtually unavoidable in our diets. The same substance can yield vastly different outcomes depending on how it is used; the food additive we are discussing today is a prime example of this duality: it can delight our taste buds, yet also harm our health—namely, polyphosphates.

 

　　Food additives have now become virtually unavoidable in our diets. The same substance can yield vastly different outcomes depending on how it is used; the food additive we’re discussing today is a prime example: it can both delight our taste buds and harm our health—namely, polyphosphates.

　　

 

　　Complex phosphates can catalyze and enhance the water-retention capacity of food ingredients—precisely the property many dried seafood products, such as sea cucumbers and shark fins, require. Consequently, some unscrupulous vendors have begun to add large amounts of complex phosphates to these products. Take sea cucumbers as an example: when heavily treated with complex phosphates, their weight can increase three to four times that of normally rehydrated specimens, yielding enormous profits in the process. Although complex phosphates are classified as food additives and appear as pale-yellow crystals, excessive use can harm human health—yet this is precisely where these merchants’ moral compass fails. It is precisely the actions of this small minority that have tarnished the reputation of complex phosphates in the public eye. In fact, complex phosphates should be used properly and responsibly.

　　

 

　　Let’s begin by discussing the applications of compound phosphates in brine-based marinades, using the most common dish—braised pork knuckles—as an example. In traditional braising recipes, the pork is first soaked in a 5% solution of compound phosphate for 20 minutes before being added to the brine. This treatment results in a finished product that looks plump and appealing, with a richer, more complex texture. And this is achieved even when the brine consists only of star anise, cinnamon, and soy sauce—simple, home-style seasonings. If appropriate aromatic spices are added, these benefits become even more pronounced. For instance, incorporating a small amount of nutmeg into the spice blend significantly enhances the tender, sticky texture of the pork knuckles after they have been soaked in the compound phosphate solution. Similarly, adding dried tangerine peel, Sichuan pepper, chili peppers, amomum villosum, bay leaves, and galangal to intensify the meaty aroma also yields noticeable improvements in the texture of the marinated pork knuckles. Moreover, this technique is not limited to pork; other ingredients with naturally tender textures, such as chicken and squab, can likewise benefit from soaking in a compound phosphate solution, resulting in enhanced tenderness and smoothness.

　　

 

　　When spices are used in combination, composite phosphates offer clear benefits, but they also have certain drawbacks. These drawbacks are particularly pronounced with spices that have strong penetrating power, such as cloves, amomum villosum, long pepper, and ginger. At normal usage levels, these spices can impart flavors that penetrate too deeply into the food, necessitating a corresponding reduction in their用量. In addition, ingredients that have been soaked in such solutions tend to have a significantly shorter shelf life. These are all factors that should be taken into account when using this food additive.