Containing many nutrients including proteins , lipids and calcium, milk is known as an important food that strengthens bones and teeth and improves immunity and physical strength. Soy milk, which has grown in popularity in recent years, contains significant amounts of isoflavone, a polyphenol, augmenting the effects of female hormones, reducing bad cholesterol in blood, and stabilizing blood pressure, all effects that have drawn attention.
We performed pH titration measurements of milk and soy milk to identity isoelectric points, diluting commercially available drinks 50-fold with a 10 mM NaCl solution and making pH adjustment with 0.5 N HCl and 0.5 N NaOH.
