Mung bean sprouts developed a slight purple color on day 3?

Mung bean sprouts developed a slight purple color on day 3? - White Motor Boat on Body of Water Beside Purple Flower Field

I've been sprouting my beans for three days now; yesterday I noticed some had developed a slight purple coloration while rinsing them, photo attached. One of them even went blue-ish, but there is no brown or signs of mold. Is this normal or should I worry?

Here's a picture of the sprouts:

Here's a pic of the sprouts



Best Answer

The sprouts developing a purple tinge is fine, it's a sign that they were exposed to light - they will even start turning green if they recieve more light.

This is like with white asparagus: As long as the stalks remain completely covered in the soil, they stay white. If they start to break through the surface, they develop a purple tinge in a very short time.

See the picture below:
Some stalks are still white, some slighltly purple.

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Mung bean sprouts developed a slight purple color on day 3? - Purple Crocus Flowers in Bloom
Mung bean sprouts developed a slight purple color on day 3? - Person in Blue Long Sleeve Shirt Holding White Electric Socket



Why are my mung bean sprouts purple?

If exposed to a little bit of light when watering, the sprouts may develop a slightly pinkish tinge, which is harmless. If exposed to even more light, the beans will begin to turn green and acquire a bitter taste. So, store the sprouts in a dark place for as much as possible.

Why are my mung bean sprouts pink?

Your sprouts might get a slightly pink tinge to them. This is from exposure to air. It's fine. If you weigh them down really well and keep the top container in contact with this, you're less likely to get pinkish sprouts.

How do you know if sprouts are spoiled?

The best way to tell if your bean sprouts are wrong is to see if they are slimy and soft. You may also notice a distinct off-odor. If you smell the odor, avoid eating the sprouts. If they have a darker color, they have been overgrown or stored in warm temperatures without being appropriately handled.

Why do bean sprouts turn red?

You can experience color changes in almost all sprouts, but Mung beans, Sunflower and Alfalfa are the most 'exposed' to color change due to stress. The sudden color change is completely natural and is due to the small plant being stressed. The stress may be too high heat or too little moisture due to lacking rinsing.



Why Bean Sprout Turn Red




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Images: Engin Akyurt, Maria Orlova, Piotr Wojnowski, Artem Podrez