Why do onions turn blue? Break your blue onions chemistry set

Did your onions turn blue? Oddly enough, there is actually an excellent clarification for blue onions. Actually no. This is often the case with red onions or shallots, but also with red cabbage and occasionally even cherries.

Also, luckily there is a way to turn it around! That’s right; if your onions are blue, we can turn them pink. So, we must understand the reason why that happens to know why and how we can change it.

Why are red onions purple?

Red onions turn blue and purple because they contain a shade called anthocyanin. That tone responds with building blocks in your food, similar to magnesium and calcium. There are other antacid components, but these rarely end up in food.

Varieties of foods high in magnesium and calcium include vegetables, nuts, tofu, mixed greens, dairy, and most proteins. Red onions contain the color anthocyanin, which produces a blue-based red. So it can go from blue to purple to red, and when cooked, it can turn blue, especially if the last dish is antacid.

How Anthocyanin Works

Anthocyanin is available from a host of food sources, not just red onions or shallots, or red cabbage. It is also present in berries, dark rice, and surprisingly dark or purple carrots. In case you think it has to do with cyanide, don’t do it. It is completely different.

Anthocyanin is made up of “anthro” which means flower-based, and “cyanine,” as in cyan. If you remember your printer’s seemingly absurd request for ‘cyan’ when you need to print any shade, this is because cyan is an essential shade. Also, anthocyanin is basically found in flowers hence the ‘antho’ part.

The point is that this tone can appear in changed tones depending on the pH of the food. An exceptionally antacid food with this shade will appear blue, for example, blueberries or pea flower. In fact, the blue tea that turns purple, that one.

Acidic food

Extremely acidic food will appear red, such as red onion or cherries. A staple or center food will appear purple, like purple cauliflower.

You may have seen that some food sources are not completely blue or red, and purple can be somewhat blue or reddish.

Going back to anthocyanin, on red onions, it appears reddish in light of the fact that onions are generally acidic. When something soluble (from the opposite end of the gamut) comes in contact with this shade, it turns more towards blue. The more soluble the food, the bluer it becomes.

This is also why salty red onions take on that wonderful pinkish hue. The corrosive in vinegar causes the anthocyanin to lean more toward red, creating the pinkish tint that you see.

Are you protected from eating onions that turned blue?

Regarding red onions, you can eat them no matter if they turn blue. There is nothing wrong with it; it is just its regular shading and how it responds to antacid food varieties.

You can try removing the onions if they bother you, but blue onions that could be problematic as a rule. A superior option is to try and change the shading.

Instructions for removing the blue

You can contain blue by adding some acid components to food varieties. For example, in case you are cooking red cabbage, and it is turning pale blue, you can turn it pinkish red with a vinegar mixture.

The equivalent can work with red onions or cherries. Regardless of whether it is vinegar, lemon squeeze, or lime squeeze, the end product should be something similar. We don’t know about squeezed orange, but in case you’re feeling exceptionally bold, you can give it a try.

Alternatively, assuming you need to bring the blue back, add some baking pop, and it’s a radiant blue once more. We don’t know how delicious that would be, but it would change the shading.

Is there a way to stay away from the blue onion?

The best way to prevent red onions from turning blue is to not use any soluble ingredients in your cooking. So no nuts, lentils, beans, greens, egg whites, red meat, salad greens, nothing of the sort.

Also, if you’re in the mood for beef stew, just use regular white or yellow onions! Those will keep their standard hue, except if you open them to exceptionally acidic food sources like vinegar or lemon juice. In which case they will turn blue-green. Ok science!

If you have other food interests, be sure to check out the related articles below, we are continually adding more food realities to make your life that much easier.

Are you Safe from eating onions that have turned blue?

The shades that shade the onions act as a litmus test. They are red in normally acidic onion. They turn green/blue in a basic climate. It seems that when you cook the beans, that basic climate was establish to cause the shade change.

In this way, the question is, do red onions turn green cooked? Red onions, like other red products, like cabbage and cherries, are rich in colors called anthocyanins. The moment they cook with corrosive, their shading increases; however, when joined with an antacid part, they can turn a surprising bluish-green hue.

Growing onions protects to eat. Onions with a green spot are signs of rot.

How would you know when onion turns bitter?

Blue onions should be soft and firm. In the case that they have delicate regions, it means that they have started to turn bitter. For the onions in half, sliced ​​or sliced, they will have become bitter if they have a disgusting surface. Smell: Onions that are starting to go bad will also start to smell terrible.

The use of onions for useful purposes: how to use them?

There are many types of onions that use for cooking. These incorporate natural shallot, leek, springboard, and others, including blue. It is recognized by a great overview of important parts in construction and a smooth taste without harshness.

The organization is due to the use of onions. Contains:


Miniature and macronutrients (magnesium, calcium, iron, phosphorus, potassium).

Nitrogenous substances.

Harvest nutrients B.


A corrosive nicotinic.





The vegetable prescribe to use as thermally raw. It is new that you do not lose all your important activities.

An important organ of an individual is the liver. Day by day presented with negative and forceful elements. The organ is one of a kind in its ability to recover its cells. In people’s medication, blue onions are used to cleanse it of poisons, to cure the ongoing type of hepatitis, damage cause by drugs, with wounds, infringement of the reliability of the body, can invigorate the elements in recovery of liver cells.

Remembered by the structure of the therapeutic substance blue onions, it can prevent the obstruction of the vessels of the liver with blood groups, as well as the control arrangement. Cirrhosis with dropsy is comparable to the blue vegetable. Common healers formula offered to apply recovery synthesis of onion and granulated sugar. This home cure can guarantee an excessive accumulation of glucose, eliminate infections from liver cells. It is a viable anthelmintic that removes worms from liver sections and tissues substance.

What is the harm of blue onion, and who should deliver this vegetable?

When burning blue onions and arranging them in pieces, it is important to make sure that there are no diseases of the gastrointestinal package and ulcers. Likewise, this fixation is contraindicate in:

Mechanical jaundice

Kidney disease Pyelonephritis. Urolithiasis

Mellitus diabetes.

No individual impression of onions. Hypersensitivity

Gallstone disease

Any questions about prescribed utilization to discuss with your primary care physician.

Techniques for planning dependent pieces of blue onion for restorative purposes

For planning a cure, a vegetable (1 kg) is washed, cleaned, and dried from the abundance of moisture. The following natural substance is ground through a blender or meat processor. In the next porridge, add sugar (900 g) and blend until smooth. Stay at room temperature without admission to light for ten days. Impregnation press prepared with a bandage. Apply the organization in the unadulterated type of 4 tbsp. every day to restore liver movement. In serious builds, the serving expands to 8 tablespoons. l

The blue onions (500 g) are removed, washed, and dried. Unrefined substances are ground into a fine part and mixed with granulated sugar (250 g) to obtain a homogeneous creation. Change of heat resistant dishes and sent from the preheated oven. The medicine is considered ready when the combination turns into caramel. It is cooled and devoured in 2 tablespoons—l twice a day on an empty stomach. The duration of treatment is determined exclusively, depending on the circumstances and the course of the infection; however, the treatment lasts no less than 90 days.

The blue onions (300g) are ready to be handled, mash to mash potatoes, joine with a dry variety of wormwood (40g), regular honey (100g), and dry red wine (3 cups). Blend well until uniform, require 21 days without entering the light. For useful purposes, the use of 3 tablespoons. Three times a day.

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