What the American Heart Association Diet Soup Actually Is
The American Heart Association Diet Soup, most commonly called the cabbage soup diet, is a seven-day liquid-based weight loss plan centered around a very low-calorie cabbage and vegetable soup consumed multiple times daily. The premise is simple enough: eat mostly soup for a week, and the resulting calorie deficit forces rapid weight loss. Most people lose between five and ten pounds during the seven days, though a significant portion of that is water weight, not fat. I got pulled into this back in 2014 when a friend insisted it was the only thing that worked before her wedding. I agreed to try it partly out of loyalty and partly because I was curious. I lost eight pounds in a week. Half of that came back within ten days. The rest was a combination of me being genuinely hungrier than usual and the metabolic slowdown that comes from dropping below a thousand calories a day.
American Heart Association Diet Soup: The Rules
The standard version requires you to eat only the cabbage soup for the entire seven days, with one exception on day four where you can add three bananas and skim milk. Some variations allow additional low-calorie vegetables or fruits on certain days, but the core recipe stays the same. The soup itself is basically cabbage, onions, celery, tomatoes, and bell peppers simmered in broth or water with seasoning. Here is the recipe most people follow: One large head of green cabbage, chopped. Six medium onions, chopped. Four green peppers, diced. Four to six stalks of celery, sliced. One 14-ounce can of tomato soup or one pound of fresh tomatoes. Ten to twelve carrots, peeled and chopped. Eight to ten cloves of garlic, minced. One teaspoon of dried thyme. One bay leaf. Salt and pepper to taste, though people are usually advised to go easy on the salt because of the dehydration risk. Eight to ten cups of water or low-sodium vegetable broth. Optional: one can of kidney beans or tomatoes for extra fiber.
You sauté the onions and peppers first, then add everything else and simmer for about an hour until the vegetables are very soft. The soup is thin, slightly sweet from the carrots and onions, and completely unremarkable in flavor. Most people report losing interest in food entirely by day three, which is either a relief or a warning sign depending on your perspective.
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How It Actually Works in Practice
The mechanism is straightforward calorie restriction, not any special property of cabbage. Cabbage is extremely low in calories, roughly twenty-two per cup raw, and high in fiber and water, which creates a feeling of fullness on a very low total calorie intake. The rapid weight loss people see is primarily glycogen depletion and water loss. Your body burns through stored carbohydrates first, and each gram of glycogen holds about three grams of water. Once those stores are gone, the scale drops fast. This is why people who try it repeatedly always get the same result: they lose weight quickly, regain it quickly. The body adapts to the severe deficit by slowing metabolism, reducing non-exercise activity thermogenesis, and increasing hunger hormones like ghrelin. You are not reprogramming anything. You are just stressing your system temporarily. I learned this the hard way on my second attempt. I lost six pounds the first week, gained four back in the next ten days, and felt worse than before. The third time around I stopped treating it as a permanent solution and started viewing it as a short-term intervention with a specific purpose. That shifted how I approached it entirely.
Common Pitfalls and What Nobody Tells You
Most guides don't mention the bathroom problem. Cabbage and broccoli family vegetables are high in raffinose, a complex sugar that most people cannot fully digest. It ferments in the colon and produces gas. You will experience significant bloating and flatulence during the first two to three days. Some people find relief by adding a half teaspoon of ginger powder to the soup, which seems to help with digestion. I also found that eating the soup warm rather than cold made a noticeable difference in how my stomach handled it. Another issue is the potassium imbalance. This diet is very low in sodium and potassium, especially in the early days when you are flushing out water. If you feel dizzy, get headaches, or experience heart palpitations, that is a sign your electrolytes are off. I encountered this on a Tuesday morning of my second attempt and had to drink a small amount of orange juice to stabilize myself. It is not dangerous for most healthy people over seven days, but it is real and it is uncomfortable. The biggest pitfall is the assumption that this diet teaches you anything about eating. It does not. You are consuming roughly 500 to 800 calories per day, mostly from vegetables and water. There is almost no protein, very little fat, and minimal carbohydrates outside of the cabbage and carrots. By day five, most people are so hungry that they make poor food choices once the diet ends, which cancels out whatever benefit the week provided.
Who Should Skip This Entirely
If you have a history of eating disorders, do not attempt this. The extreme restriction and the scale obsession it creates can trigger relapse in vulnerable individuals. If you are diabetic or have blood sugar issues, the low carbohydrate intake combined with minimal food volume can cause dangerous hypoglycemia. Pregnant or breastfeeding women, children, and anyone under 18 should avoid this completely. People with kidney problems should be cautious because the high potassium content from the vegetables can be problematic if your kidneys are not processing it efficiently. I know someone who tried this while managing Type 2 diabetes on medication. Their blood sugar dropped to dangerous levels by day three and they ended up in urgent care. The doctor told them the medication dosage needed adjustment during any significant calorie reduction. This is not a minor inconvenience. It is a real medical risk.
A More Practical Alternative
If your goal is legitimate fat loss, the cabbage soup diet is inefficient and unsustainable. A moderate calorie deficit of five hundred to seven hundred calories below your maintenance level, combined with adequate protein intake and resistance training, produces similar short-term results with far fewer side effects and better long-term outcomes. Protein preservation during a deficit matters enormously. The cabbage soup diet provides almost none, which means you lose muscle along with fat, and muscle loss reduces your resting metabolic rate. If you still want to try the American Heart Association Diet Soup for a week, do it with a plan for what comes after. The first week is the easy part. The second week, transition gradually back to normal calories. Add protein sources slowly. Keep the cabbage and vegetables in your routine because they are genuinely healthy and low-calorie. The soup itself is not the problem. The problem is the expectation that a seven-day liquid diet will solve anything beyond temporary water weight reduction. I have tried it twice and watched other people try it dozens of times. The pattern never changes. The scale moves fast, the energy crashes, the hunger returns, and the weight comes back. But if you use it as a short reset rather than a strategy, it can work as a psychological tool. It reminds you what starvation feels like and makes normal eating look reasonable by comparison. That realization is sometimes worth the week of misery.
