Beta-carotene which makes these tubers orange balances your skin's pH helps combat dryness and promotes cell turnover all resulting in smoother skin.
地瓜表皮的红色是由于含有叶红素，这种物质会保持皮肤的酸碱度，抗击干燥促进细胞更新，使肌肤光滑。
2
The sour-cell enzymes might be maintaining the pH balance of the taste buds, and the tang of soda water is just fallout.
酸感应细胞酶也许维持着味蕾的PH值平衡，而苏打水强烈的气味恰好刺激了它。
3
But now scientists, who published their study in the journal Cell, have discovered the process by which the pH levels of the "internal environment" is controlled.