Why does the aloe vera gel change color from white to pink when placed in the refrigerator?

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Gerhard Martens

Dear Fatma Mohmmed Emeetteg ,

please have a look at:

https://honestaloe.com/why-did-my-aloe-gel-turn-pink/

Best regards

G.M.

Desalegn Amenu

The color change in aloe vera gel when placed in the refrigerator is often due to a reaction involving enzymes and compounds present in the gel. Here's a breakdown of the potential reasons:

Enzymatic Browning: Aloe vera contains enzymes such as polyphenol oxidase that can cause browning or color changes when exposed to air, light, or certain temperatures. In the case of refrigeration, the cooler temperature might trigger these enzymes to become more active, leading to the gel's color changing from white to pink.

Anthraquinone Compounds: Aloe vera gel contains compounds like anthraquinones, which are responsible for its therapeutic properties. These compounds can undergo chemical reactions under different environmental conditions, including temperature changes. These reactions can lead to color variations, including the gel turning pink.

Microbial Growth: Sometimes, when aloe vera gel is not stored properly or if it's exposed to contaminants, microbial growth can occur. Certain types of bacteria or fungi can produce pigments that cause the gel to change color. However, if microbial growth is the cause, it's usually a sign of spoilage and the gel should not be used.

Oxidation: Exposure to oxygen, which can happen when the gel is transferred to a new container or when it's exposed to air in the refrigerator, can also contribute to color changes. Oxygen can react with compounds in the gel, leading to oxidation reactions that alter its color.

Overall, the color change in aloe vera gel when refrigerated is likely a result of enzymatic reactions, chemical changes in its compounds, or possibly microbial activity if contamination has occurred.

Mateo Alimoren Alin

Aloe vera gel changing color from white to pink when placed in the refrigerator can be attributed to several factors, including:

Oxidation: Aloe vera gel contains phenolic compounds and enzymes that can undergo oxidation when exposed to air. Even though the refrigerator is a cooler environment, there is still some exposure to oxygen which can lead to the gel turning pink or red.

pH Changes: Aloe vera gel has natural acids and the pH can change when it is stored in different conditions. A shift in pH levels can cause color changes in the gel.

Temperature Effects on Compounds: Certain compounds in aloe vera gel might be sensitive to temperature changes. Refrigeration can sometimes cause chemical changes that alter the appearance of these compounds, resulting in a color shift.

Natural Pigments: Aloe vera contains anthraquinones, which are compounds that can change color under various conditions. These natural pigments might be responsible for the pink coloration when the gel is stored in the refrigerator.

Contaminants or Additives: If the aloe vera gel is not pure and contains other ingredients or preservatives, these could interact with the natural components of the gel when refrigerated, leading to a color change.

In most cases, this color change is harmless and does not indicate spoilage, but it's always good to check for any unusual odor or texture to ensure the gel is still good for use.

Source: chatGPT

Fatma Mohmmed Emeetteg

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