What is red cabbage juice for?

Red cabbage juice has been used for many years as a natural pH indicator. When added to acidic, basic, or neutral solutions, it turns different colors to indicate the pH level. More recently, red cabbage juice has been studied for potential health benefits such as antioxidant, anti-inflammatory, and chemoprotective effects.

Using Red Cabbage as a pH Indicator

Red cabbage contains a water-soluble pigment called flavin (anthocyanin) that is a natural pH indicator. The pigment changes color based on the acidity or alkalinity of the solution it is mixed with:

• Red = acidic pH (below 7)
• Purple = neutral pH (around 7)
• Green/Yellow = alkaline pH (above 7)

To use red cabbage as a pH indicator:

1. Chop up some red cabbage leaves and put them in a pot of water. Bring to a boil and then turn down and simmer for about 10 minutes.
2. Strain the water into a container. This red cabbage water is your indicator solution.
3. Add a small amount of the indicator to test solutions to determine their pH levels based on the color change observed.

Some examples of using red cabbage indicator:

Solution	Color Change	Indicated pH
Lemon juice	Red	Acidic (below 7)
Baking soda in water	Green/Yellow	Alkaline (above 7)
Pure water	Purple	Neutral (around 7)

This allows red cabbage juice to be used as a simple, natural pH indicator for science experiments and demonstrations.

Health Benefits of Red Cabbage

In addition to its use as a pH indicator, red cabbage contains compounds that may offer potential health benefits:

Antioxidant Effects

Red cabbage is high in antioxidant compounds like polyphenols and anthocyanins. These help neutralize free radicals and oxidative stress in the body. Studies show red cabbage has higher antioxidant capacity than many other fruits and vegetables like tomatoes and carrots.

Anti-Inflammatory Properties

The polyphenols in red cabbage exhibit anti-inflammatory activities. Inflammation is linked to many diseases like heart disease, arthritis, and neurological conditions. Red cabbage polyphenols may help reduce inflammation.

Anti-Cancer Effects

Research indicates the flavonoids and sulforaphane in red cabbage may help fight cancer growth. Sulforaphane helps activate protective enzymes. Animal and lab studies show red cabbage extracts may slow cancer growth, especially for colon, prostate, and breast cancers.

Nutritional Profile of Red Cabbage

Here is the nutritional profile of 1 cup (89g) of raw shredded red cabbage:

Nutrient	Amount	% Daily Value
Calories	28	1%
Protein	1g	2%
Carbohydrates	7g	2%
Fiber	2g	7%
Vitamin C	54mg	60%
Vitamin K	85mcg	71%
Vitamin B6	0.1mg	6%
Folate	23mcg	6%
Potassium	216mg	4%

Red cabbage is very low in calories and high in vitamin C, vitamin K, and anthocyanins. It provides some fiber, folate, and minerals like potassium.

Using Red Cabbage Juice

There are several ways people consume red cabbage juice for potential health benefits:

Drinking Red Cabbage Juice

Some people drink red cabbage juice straight or mixed with other fruit/vegetable juices. Start with a small amount like 1-2 ounces per day. It has a strong, bitter taste. Mixing it with sweeter juice can make it more palatable.

Applying Topically

Due to its antioxidant and anti-inflammatory properties, some use red cabbage juice as a topical remedy. It may help soothe skin irritations when applied to the affected area. More research is needed on topical benefits.

Taking Red Cabbage Extract

Red cabbage extract supplements containing concentrated anthocyanins are available. Follow dosage on products. Talk to your doctor before taking supplements.

Potential Side Effects and Precautions

Red cabbage juice is safe for most people when used in moderation. However, there are some precautions to be aware of:

• It contains compounds called oxalates which can cause kidney stones in those prone to them. Avoid if you have kidney issues.
• The sulfur compounds may cause bloating and gas in some individuals.
• Red cabbage interferes with blood thinning medications. Avoid taking it medicinally if you take blood thinners.
• Some people are allergic to red cabbage.
• Excess consumption may lower iodine levels and affect thyroid function.

When trying red cabbage juice medicinally, start with a small amount and discontinue use if any negative side effects occur.

How to Make Red Cabbage Juice at Home

It’s easy to make red cabbage juice at home. Follow these steps:

1. Select a fresh red cabbage head. Wash it thoroughly.
2. Remove the tough outer leaves. Chop the cabbage into pieces.
3. Put the chopped cabbage in a blender. Add a small amount of water.
4. Blend until smooth and pulpy. Strain out the juice using a cheesecloth or nut milk bag.
5. Squeeze the cloth to extract as much juice as possible. Discard the pulp.
6. Store the red cabbage juice in a jar in the refrigerator for up to 5 days.

Tips for use:

• Drink 1-2 ounces diluted with water or juice daily.
• Mix with other juices like apple, carrot, or pomegranate juice to mellow the taste.
• Add some lemon juice or vinegar to stabilize the color and anthocyanins.

Conclusion

Red cabbage juice is most commonly used as a natural pH indicator for science projects and experiments. However, it also contains beneficial plant compounds that may offer antioxidant, anti-inflammatory, and anti-cancer effects. Early research on red cabbage nutrition and compounds shows promising health benefits.

Drinking a small amount of red cabbage juice, taking supplements, or applying it topically may boost overall health. However, excess consumption can cause side effects like digestive upset and interactions with medications. Speak to your doctor before using red cabbage juice medicinally.