Is it normal for anthocyanins to change color?

If your body is prone to fatigue or other discomforts, but you do not have any major illness, you can use some health supplements to improve these symptoms. Some skin problems such as dullness and pigmentation can also be improved with these health products. Anthocyanins have this effect. So is it normal for anthocyanins to change color? Let’s talk about it below.

To remove the hair from the peaches, add 1 spoon of baking soda (sodium bicarbonate) to the water used to wash the peaches. The peach hairs did fall off, but the surface of the peach underwent a horrible change - the color changed from pink to purple-black. The audience member said he was a chemistry major and felt that this color change phenomenon was a bit like the litmus in acid-base indicators. How can litmus be found in food? Could it be that the vendor soaked it in chemical solutions?

Clearing the fog: Anthocyanins are to blame

This is a normal phenomenon. Because the red color of peaches comes from anthocyanin, which is a natural pigment. Its characteristic is that it is red in acidic conditions and usually turns blue in alkaline conditions, and there may also be transitional colors such as purple and green in between. If the color is darker, it may appear purple-black as this viewer described. Speaking of which, this property is really a bit like acid and alkali indicators such as litmus. However, this acid-base indicator comes with the food itself.

Washing peach hair with alkaline water is very scientific!

Washing peach hairs with alkaline water is actually a more scientific operation. The result is not only that the peach hairs can be washed away, but also the peach skin can be easier to tear, making it very convenient to eat. This is because the peel of fruits is often rich in pectin. Pectin molecules are sensitive to alkaline conditions and are easily decomposed. The separation of pectin will cause the cell walls to soften, so the skin will easily soften after soaking in alkaline water and can be peeled off with a light wipe. In industrial production, the process of soaking peaches in alkaline water and then mechanically rubbing the skin is used to help make canned peaches.

However, the soaking time cannot be too long. After a long time, the alkaline water will penetrate into the peach and destroy the vitamin C in it, while also affecting the taste of the flesh. Soaking in alkaline water for a long time can easily cause the fruit to change color to yellow or brown.

From the article, we can know that it is normal for anthocyanins to change color. When using health care products, in addition to taking them on time, you should also pay attention to whether the products are expired or contaminated. If so, stop taking it immediately. Otherwise, it will not only fail to maintain your health, but may also cause physical illness. Therefore, you must pay attention to safety when using health products.