Detox Juice Diet — From Rapid Calorie Drop to Yo-yo Effect and Vegetable Supplementation

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title: "Detox Juice Diet — From Rapid Calorie Drop to Yo-yo Effect and Vegetable Supplementation"

Recently, there has been a noticeable increase in people asking in the consultation room, "Doctor, I'm thinking of trying a detox juice diet; would that be okay?" It's tempting when you see reviews on SNS saying their bodies felt lighter in just a few days. I would have been swayed if I were in the same position. So today, let's examine together whether detox juices actually help lose weight and what happens inside our bodies during the process.

![Consultation scene in the clinic. A doctor character wearing glasses sits opposite a patient, explaining with a finger. The patient is listening attentively. Medical office atmosphere in the background]](/api/files/assets/2026-06/9eccd6d5.jpg?sig=476c99fdd3336ade301f21d02dc48e16eb824c9f48f28a861bf948192cb0964a)

Detox Juice, Does It Really Remove Toxins from the Body?

First, there is one thing to clarify. Detoxification in our body is handled by the liver, kidneys, skin, and lungs. It is a structure where toxins exit through urine, stool, sweat, and respiration. Medical evidence that a specific juice or food can replace this function or boost it in a short period is difficult to find even in hospital or academic reviews.

A 2015 detox diet review paper introduced by a nursing hospital also concluded that no clear evidence was found to show that it reduces toxins in the body. Therefore, the statement that "juice removes toxins" is close to an exaggeration. True detox is nothing special. It is about creating an environment where the liver and kidneys can work well through regular meals, exercise, and sleep.

![Left: Calorie bar graph (plummeting from 1,800kcal to 600-1,000kcal). Right: Pie chart showing weight loss composition (Water 50%, Muscle 30%, Fat 20%). Arrows and numbers]](/api/files/assets/2026-06/33fe51ef.jpg?sig=4603765d1d6b45395daf658a0b75fd1325af2263325c7b3ddee144fbef4a40fb)

Then Why Does It Feel Like Weight Is Being Lost?

Reviews saying they lost 1~3kg in a few days are often true. The trap is that what was lost is not fat.

For someone who usually consumes 1,800~2,000kcal a day, replacing meals with juice usually causes the intake to drop sharply to around 600~1,000kcal per day. Since one cup of fruit or vegetable juice (200ml) is approximately 80~120kcal, it is common for the total daily intake to fall short of a single regular meal even if drunk all day.

When calories are reduced this drastically, the body first releases water that was bound with glycogen. Additionally, some muscle mass is also lost. While the number on the scale decreases, it is more accurate to say the body has been "emptied" rather than saying it has become lighter. Once you resume eating, the glycogen and water return, and the numbers return as well. This is what is commonly called the yo-yo effect.

![Large juice bottle in the center. Cabbage, celery, beet, carrot, and apple are each indicated by arrows. Small calorie/glycemic index labels are marked next to each ingredient]](/api/files/assets/2026-06/00e841aa.jpg?sig=50fa4052ba90595c59143d1d1b4bc6555fc52aedd2ef8efb4f42a0fba69eab16)## Jungkook's Detox Juice: Week 1 Sales Up 427%, Let's Look at the Essence, Not the Hype

Last year, BTS Jungkook mentioned a detox juice during a live stream, which became quite the hot topic. It became known as Foodology's Greenology Salad 48-Hour Pre-Meal Juice, with notes that it contained cabbage and salad vegetables. According to reports, the product's sales increased by approximately 1 week, about 5.3 times, which is roughly 427%.

I hear about this product from patients from time to time as well. However, there are some points to address. These types of juices are designed as low-calorie pre-meal drinks with approximately 1 serving at 50~100 kcal, so rather than "removing toxins from the body with juice alone," they are designed as "a supplemental tool to slightly add vegetables before a meal." Just because a celebrity drinks it doesn't mean the same results will occur in your body—the key is what role it plays within your overall diet.

![3 rows × 4 columns comparison table. Rows: green vegetables / red vegetables & fruits / distinction. Columns: ingredient name, calories, glycemic index, recommendation level. Clear distinction between green and orange-red colors]](/api/files/assets/2026-06/129a91d7.jpg?sig=f8c101117aff3f804cb8f45a683754997bdf33bfae1a90a601d2ec32e0e7c71d)

There Are Actually Better Juice Options for Diet

Some medical outlets have doctors emphasizing that "juices are helpful when used as a complement to, not a replacement for, an existing healthy diet." I agree. And even within that, there are less risky choices.

• Juices made primarily from celery, cabbage, kale, and spinach—green vegetables—don't spike blood sugar significantly, making them relatively safer.
• Juices loaded with beets, carrots, and apples taste good from the natural sweetness, but the sugar and calorie content rises, which can have the opposite effect on weight loss.
• For those with diabetes or insulin resistance, even the same fruits and vegetables are safer when eaten whole. Drinking them as juice causes blood sugar to rise more steeply.

![Split screen of a Korean medicine clinic consultation room. Left: a patient who looks fatigued (expression of cold hands and feet), Right: a bright-looking patient (improved swelling appearance). A doctor in the center taking pulse on both sides]](/api/files/assets/2026-06/f00ef2d7.jpg?sig=6a74173dc777c14cc89f534605b2192aeee32d6719795f2f53c0bc8bd45c29c8)

In Korean Medicine, "Emptying" and "Being Left Empty" Are Different in Nature

Korean medicine also frequently uses the concept of "emptying." However, it's not about emptying yourself out by fasting for several days. It's closer to the meaning of organizing and putting in order the areas where digestion, circulation, and fluid metabolism have become disrupted. In the clinic, when we examine patients' pulses and abdominal diagnosis, we see that even with the same "one-week detox juice" regimen, some people experience a slight reduction in swelling, while others' hands and feet become even colder and their energy declines.

In particular, I've often seen cases where people with weak digestion or chronically cold hands and feet replace meals with cold juice alone, which further dampens the stomach's qi, worsening post-meal bloating and fatigue. That's why I consider it more important whether one's meal, digestion, and sleep rhythms remain unbroken after the fact, rather than the short-term number on the scale.

![Key sentences in large, bold text on a white background. Some portions of the sentences are highlighted in color (blue or red) for emphasis. Hand-drawn boxes or underlines for visual emphasis]](/api/files/assets/2026-06/1674a718.jpg?sig=093befb86f8afebe1c5267a35be07d94515d99f7e69617477c769412a0ad0327)

Practical points you can apply starting today

It does not have to be grand. I will organize this in the same tone I use when guiding patients in the consultation room.

• Avoid extreme methods such as 3 to 7 day juice fasts, and try using it only as one snack or a pre-meal supplement within a single meal
• Even if you have a glass of juice, be sure to include one palm-sized portion of protein (lean meat, tofu, eggs, fish) in your meal
• Focus on dark green vegetables, and limit fruit to only one kind in a small amount
• For those whose stomachs feel uncomfortable with cold drinks, leave them at room temperature for a while before drinking or switch to warm barley tea or ginger tea
• Do not look only at the number on the scale; record that week's meals, sleep, bowel movements, and fatigue together

Following just these points will greatly reduce the common regret of "I started this to remove toxins, but I only lost my energy."

Detox juice is not a magic tool. However, I believe it is meaningful enough as a signal that you want to reorganize your diet. In the consultation room, using that signal as a starting point, we together establish a direction to manage weight without strain, tailored to your constitution and digestive state. Rather than entrusting everything to a single cup of juice alone, if you would like to check with a professional at least once, you may lightly receive a consultation for Baekrokdam Korean Medicine Clinic's Baekrok Gambi-jung tablet. It will be a time to map out together where to start adjusting your current eating habits.