Scientific deep-dive

Is Soup Good for Weight Loss? Evidence Review (Broth vs Cream, Satiety, Sodium)

Yes for broth-based with veg + lean protein; no for cream-based + cheese bisques. Flood & Rolls 2007 Appetite: ~270 kcal soup preload cut total meal energy ~20%. Ello-Martin 2007 AJCN 12-mo RCT: low-energy-density pattern -7.9 vs -6.4 kg.

By Eli Marsden · Founding Editor
Editorially reviewed (not clinically reviewed) · How we verify contentLast reviewed
11 min read·9 citations

The honest answer: yes for broth-based soups loaded with vegetables and lean protein (lentil, minestrone, miso, chicken-vegetable, gazpacho), eaten as a preload before a meal or as the main course with a protein anchor; no for cream-based chowders, bisques, and cheese-laden soups where the dairy fat doubles or triples the calorie load. Soup is ~80–95% water by weight, which is the load-bearing feature for weight loss. The Flood & Rolls 2007 Appetite crossover RCT[1] in 60 adults found that a ~270 kcal soup preload eaten 15 minutes before an ad-libitum lunch cut total meal energy intake by ~134 kcal (~20%) vs no-preload control — and broth, chunky, pureed, and chunky-pureed forms all worked comparably. The mechanistic foundation is Rolls 1999 Am J Clin Nutr[2]: when a chicken-rice casserole was blended with the same volume of water and served as soup, total meal energy intake fell ~26% vs the same casserole eaten with a separate glass of water on the side. Water incorporated INTO the food triggers satiety; water drunk alongside it does not. The Ello-Martin 2007 AJCN 1-year RCT[3] in 97 obese women confirmed the practical translation: a low- energy-density eating pattern (soup, fruit, vegetables, broth bases) produced −7.9 kg at 12 months vs −6.4 kg for the fat-reduction-only group. The Ello-Martin 2005 AJCN review[4] documents broth-based soup at ~0.3 –0.5 kcal per gram — vs ~1.5–2.5 kcal/g for typical entrees — placing it among the lowest-energy- density foods in the food supply. The honest pitfalls are sodium and cream-based add-ins. Per USDA FoodData Central[7], canned chicken noodle soup runs ~889 mg of sodium per cup; cream of mushroom prepared with milk hits ~1,019 mg; New England clam chowder ~890 mg. The AHA recommends <2,300 mg/day with an ideal limit of 1,500 mg for most adults[8]; the DGA 2020–2025 sodium target is <2,300 mg/day for ages 14+[9]. One bowl of regular canned soup can deliver ~40–60% of the daily sodium ceiling. Practical rules: choose low-sodium or homemade broth bases; add lentils, beans, chicken, or tofu for ~15–25 g of protein per bowl; skip cream- based chowders and cheesy bisques as a default; pair with a protein side if the soup itself is broth-only. Magnitude check: STEP-1 semaglutide[5] −14.9% body weight at 68 weeks; SURMOUNT-1 tirzepatide[6] −20.9% at 72 weeks. Soup is one of the most reliable low-energy-density preload foods, not a weight-loss intervention — but for GLP-1 patients managing nausea, early satiety, and low-volume tolerance, broth-based soups are one of the few foods that consistently work.

At a glance

  • Soup is ~80–95% water by weight and runs ~0.3–0.5 kcal per gram for broth-based versions vs ~1.5–2.5 kcal/g for typical entrees (Ello-Martin 2005 AJCN review[4]). The water content is the load-bearing weight-loss feature.
  • Soup preload before a meal cuts intake. Flood & Rolls 2007 Appetite RCT[1] in 60 adults: a ~270 kcal soup preload 15 minutes before lunch reduced total meal energy intake by ~134 kcal (~20%). All four soup forms (broth, chunky, pureed, chunky-pureed) worked comparably.
  • Water blended INTO food works; water on the side does not. Rolls 1999 AJCN crossover RCT[2] in 24 lean women: a chicken-rice casserole blended with water into soup form cut total meal energy intake ~26% vs the same casserole eaten with a separate glass of water.
  • 12-month RCT signal favors the soup-rich pattern. Ello-Martin 2007 AJCN[3] in 97 obese women: low-energy-density eating pattern (soup, fruit, vegetables, broth bases) produced −7.9 kg at 1 year vs −6.4 kg for fat-reduction-only group.
  • Broth-based vs cream-based is the biggest decision. Per USDA[7]: chicken noodle ~62 kcal/cup; minestrone ~82 kcal/cup; lentil ~139 kcal/ cup; miso ~36 kcal/cup; cream of mushroom (with milk) ~166 kcal/cup; New England clam chowder ~164 kcal/cup. Cream-based versions run 2–3x the calorie load.
  • Sodium is the real pitfall. Canned chicken noodle ~889 mg Na/cup; cream of mushroom (with milk) ~1,019 mg; minestrone ~911 mg; lentil ~876 mg (USDA[7]). One bowl can hit 40–60% of the AHA <2,300 mg/day ceiling[8] and the DGA 2020–2025 same target[9]. Look for “low-sodium” (≤140 mg/serving) or homemade.
  • Best-evidence soup styles for weight loss: lentil, minestrone, miso, chicken-vegetable, gazpacho, tomato-vegetable, hearty bean. Worst: New England clam chowder, lobster bisque, broccoli-cheddar, cream of anything, French onion with the cheese-and-bread crown.
  • GLP-1 use case is unusually strong. Broth-based soup is low-volume, nausea-tolerant, easy on delayed gastric emptying, and the bone-broth subgenre adds electrolyte and protein without dense food.

The volumetrics argument: why ~80–95% water matters

Soup is among the lowest-energy-density foods commonly eaten. Broth-based soups like miso (~36 kcal/cup), chicken broth (~38 kcal/cup), gazpacho (~46 kcal/cup), and chicken noodle (~62 kcal/cup) run ~0.15–0.4 kcal per gram per USDA FoodData Central[7]. The Ello-Martin 2005 AJCN review[4] by an obesity-nutrition group at Penn State documents the principle: people eat a relatively consistent weight of food per day, but the energy density of that food (kcal per gram) varies 5–10-fold. Cutting energy density — by adding water, vegetables, or broth — reduces calorie intake without reducing the amount of food eaten or triggering hunger.

Broth-based soups are the canonical low-energy-density food because the water is structurally part of the meal, not a separate beverage. The Rolls 1999 AJCN crossover RCT[2] directly tested this. Twenty-four lean women ate three matched meals on three separate days:

  • Casserole alone (chicken, rice, vegetables, cheese): baseline ad-libitum intake.
  • Casserole + glass of water on the side: identical food + 350 g water as a separate beverage.
  • Casserole blended into soup form: same ingredients + same volume of water blended INTO the meal to become a thick soup.

Total meal energy intake in the soup arm was ~26% lower than the casserole-with-water-on-the-side arm. The water added to the side did not reduce intake; the water blended into the food did. The mechanism is satiety signaling: stretch receptors in the stomach register total meal volume, and nutrient-sensing in the upper intestine integrates the slower gastric emptying of a viscous water-rich meal vs a compact entree. Water drunk separately empties the stomach within ~10–20 minutes and does not contribute to sustained satiety signaling.

The preload effect: Flood & Rolls 2007 Appetite RCT

The strongest single piece of evidence that soup actively reduces calorie intake at a meal is the Flood & Rolls 2007 Appetite crossover RCT[1] in 60 adults (women and men, normal-weight to overweight). Each subject attended five test lunches on five separate days, in randomized order:

  • No-preload control (lunch only)
  • Broth soup preload (clear, ~270 kcal)
  • Chunky soup preload (clear with vegetables, ~270 kcal)
  • Pureed soup preload (smooth blended, ~270 kcal)
  • Chunky-pureed soup preload (~270 kcal)

Soup preload was eaten 15 minutes before an ad-libitum lunch. Findings:

  • Lunch intake was reduced by an average of ~134 kcal across all four soup forms vs no-preload control.
  • Total meal intake (soup + lunch) was ~134 kcal LOWER than the no-preload control — even though subjects had already eaten ~270 kcal of soup. Net reduction in total energy: ~20%.
  • Soup form did not matter. Broth, chunky, pureed, and chunky-pureed all produced statistically comparable reductions. The preload effect is about the fluid + low-energy-density food vehicle, not the texture.
  • Subjective hunger ratings did not differ between preload and no-preload arms before the lunch, arguing the satiety effect is largely automatic rather than driven by conscious fullness.

Practical translation: a ~150–200 kcal broth-based soup eaten 15 minutes before lunch or dinner typically reduces total meal calories by ~100–150 kcal in healthy adults. Over a 7-day week with daily preload, that is ~700–1,000 kcal saved without conscious portion restriction at the main meal. The preload tactic does not depend on the soup form, but the soup must be low energy density (broth-based, not cream-based) to capture the effect.

Magnitude comparison

Soup style drives the calorie curve. Broth-based soups (miso, chicken broth, gazpacho, chicken noodle, minestrone, lentil) run ~36-139 kcal per cup; cream-based versions (clam chowder, cream of mushroom with milk) run ~164-166 kcal per cup, 2-3x the broth-based options. For weight loss, the broth-based row is the load-bearing choice (USDA FoodData Central per ~245 g serving).[1][4][7]

  • Miso soup (1 cup) — calories36 kcal
    ~838 mg sodium; broth-based, low energy density
  • Chicken broth, low-sodium (1 cup)17 kcal
    ~70 mg sodium; near zero energy density
  • Gazpacho, restaurant (1 cup)46 kcal
    Cold tomato-vegetable; ~739 mg sodium
  • Chicken noodle, canned (1 cup)62 kcal
    ~889 mg sodium; broth + noodles + chicken
  • Tomato soup, prep w/ water (1 cup)74 kcal
    ~471 mg sodium; broth-based when water-prep
  • Minestrone, canned (1 cup)82 kcal
    ~911 mg sodium; beans + veg + pasta in broth
  • Lentil soup, canned (1 cup)139 kcal
    ~876 mg sodium; ~9 g protein from lentils
  • Tomato soup, prep w/ milk (1 cup)150 kcal
    ~744 mg sodium; milk adds 76 kcal vs water-prep
  • New England clam chowder, w/ milk (1 cup)164 kcal
    ~890 mg sodium; cream + butter + potatoes
  • Cream of mushroom, w/ milk (1 cup)166 kcal
    ~1,019 mg sodium; one of the highest-sodium soups
Soup style drives the calorie curve. Broth-based soups (miso, chicken broth, gazpacho, chicken noodle, minestrone, lentil) run ~36-139 kcal per cup; cream-based versions (clam chowder, cream of mushroom with milk) run ~164-166 kcal per cup, 2-3x the broth-based options. For weight loss, the broth-based row is the load-bearing choice (USDA FoodData Central per ~245 g serving).

Broth-based vs cream-based: the calorie-density split

The single most consequential soup decision for a weight- loss eater is broth-based vs cream-based. The same brand and same volume of canned soup can deliver 2–3x the calorie load depending on the base. Per USDA FoodData Central[7]:

  • Broth-based examples (per 1-cup, ~245 g serving): chicken broth (regular) ~38 kcal; miso ~36 kcal; gazpacho ~46 kcal; chicken noodle (canned, prepared) ~62 kcal; tomato (prepared with water) ~74 kcal; minestrone (canned) ~82 kcal; lentil (canned) ~139 kcal.
  • Cream-based examples (per 1-cup, ~245 g serving): tomato (prepared with milk) ~150 kcal; New England clam chowder (prepared with milk) ~164 kcal; cream of mushroom (prepared with milk) ~166 kcal; cream of chicken (prepared with milk) ~190 kcal; broccoli-cheddar (restaurant) often ~230–280 kcal; lobster bisque ~300–380 kcal per cup.

The calorie gap is mostly added dairy fat and oil from the cream base and any cheese, butter, or roux thickener. The practical implication: a 1.5-cup bowl of minestrone is ~125 kcal; a 1.5-cup bowl of broccoli-cheddar can be 350–420 kcal at the same physical volume. Restaurant cream-based bowls served in 2-cup portions routinely hit 400–600 kcal before bread or sides.

The honest rule: broth-based by default. The broth-vegetable-lean-protein archetype (chicken-vegetable, minestrone, lentil, hearty bean, miso, gazpacho, chicken noodle, beef-and-barley with lean beef) keeps the calorie density at ~0.3–0.6 kcal per gram. Cream-based and cheese-based bowls are occasional only.

The sodium reality: canned soup is one of the saltiest food categories

The biggest pitfall in commercial soup is sodium, not calories. Per USDA FoodData Central[7], a single cup of regular canned soup typically delivers 600–1,000 mg of sodium — and most people eat the full ~440 mL (~1.85-cup) can in one sitting, doubling the load.

  • Regular canned chicken noodle: ~889 mg/cup (~1,650 mg per can)
  • Regular canned minestrone: ~911 mg/cup
  • Cream of mushroom (with milk): ~1,019 mg/ cup — close to one full day’s AHA ideal limit
  • Lentil soup, canned: ~876 mg/cup
  • Miso soup (instant or restaurant): ~838 mg/ cup
  • Canned chicken broth, regular: ~924 mg/ cup — the broth itself is one of the saltiest items

The AHA recommends <2,300 mg/day of sodium with an ideal limit of 1,500 mg/day for most adults[8]. The DGA 2020–2025 set the target at <2,300 mg/day for ages 14+[9]. One bowl of regular canned soup delivers ~40–60% of the daily ceiling and can exceed the 1,500 mg ideal limit on its own.

Practical mitigation: choose “low-sodium” versions (FDA defines as ≤140 mg per serving) or “reduced-sodium” (at least 25% less than the original). Common low-sodium brands available at most US supermarkets cut the load to ~140–480 mg/cup. For homemade broth, use a low-sodium or no-salt-added base (~50–100 mg/cup) and add herbs (oregano, thyme, bay leaf, smoked paprika), garlic, lemon, vinegar, or a small amount of miso paste (15–30 mg sodium per teaspoon worth of umami) for flavor.

Patients with hypertension, heart failure, or chronic kidney disease should treat canned soup as a once-or-twice- a-week food at most, and prefer homemade broth-based soup with controlled sodium.

Best-evidence soup styles for weight loss

The soup categories that consistently deliver low energy density, meaningful protein, fiber, and tolerable sodium:

  • Lentil soup (~139 kcal/cup, ~9 g protein, ~6–8 g fiber per cup[7]). Plant-protein anchor, high fiber, satiety-dense. Pair with a small whole-grain bread or salad for a complete meal.
  • Minestrone (~82 kcal/cup, ~4–5 g protein, ~4–5 g fiber[7]). Beans + vegetables + small pasta in tomato-broth base. The archetypal volumetric soup.
  • Miso soup (~36 kcal/cup, ~2–3 g protein from tofu and miso[7]). Lowest calorie density among traditional soups; high sodium is the tradeoff. Useful as a preload or a small starter.
  • Chicken-vegetable / chicken noodle (~62 kcal/cup canned, ~10–15 g protein for homemade versions with more chicken[7]). The classic comfort soup. Homemade with low-sodium broth and extra chicken hits ~150–200 kcal / ~20 g protein / ~3 g fiber per bowl.
  • Gazpacho (~46 kcal/cup[7]). Cold tomato-cucumber-pepper soup, raw vegetables blended. Very low energy density; useful in summer as a preload.
  • Black bean / split pea / hearty bean soups (~150–200 kcal/cup, ~10–13 g protein, ~7–10 g fiber). Plant-protein-dense with very high satiety per calorie. The fiber load (especially split pea) is one of the highest in the soup category.
  • Vegetable soup with chicken / turkey / tofu added: homemade pattern that converts a broth- vegetable base into a complete meal. Target ~20–30 g protein per bowl.

The categories to avoid or limit:

  • New England clam chowder (~164–220 kcal/cup canned, often 300–500 kcal per restaurant bowl[7]). Cream + butter + potato base. High SFA, high sodium.
  • Cream of mushroom / cream of chicken / cream of celery / cream of broccoli (~166–190 kcal/cup with milk[7]). Cream base + roux; commonly the saltiest at ~1,000 mg sodium/ cup.
  • Broccoli-cheddar / cheddar-and-bacon / cheese-based bisques (often 230–380 kcal/cup, restaurant bowls 400–600 kcal). Cheese fat dominates. Bread bowls add another 400–500 kcal.
  • Lobster / shrimp bisque / she-crab soup (300–380 kcal/cup at restaurant; commonly served in 1.5–2-cup portions). Cream-and-butter base.
  • French onion with full cheese-and-crouton crown (350–450 kcal at restaurant). Broth base is fine; the gratineed cheese cap and bread top add the calorie load.

Homemade vs canned: the practical trade-off

Homemade soup is the optimal version: low sodium, no thickener, full control over protein and vegetable loading. A pot of homemade chicken-vegetable soup with low-sodium broth, a pound of chicken thigh, two cans of low-sodium beans, three cups of mixed vegetables, herbs, and garlic runs ~150–200 kcal per ~1.5-cup bowl with ~20–25 g of protein and ~5–7 g of fiber, at ~250–400 mg sodium per bowl.

Canned soup is the convenient version. The realistic sodium-conscious approach:

  • Choose “low-sodium” (≤140 mg per serving) or “reduced-sodium” (~25% less than regular) labels.
  • Avoid cream-based versions as a default. Pick broth-based versions (chicken noodle, minestrone, lentil, hearty bean, vegetable, tomato).
  • Add a protein source if the canned soup is broth-only or low-protein: stir in pre-cooked chicken, canned beans, tofu, or a hard-boiled egg.
  • Rinse canned beans before adding them to soup to cut ~40% of their sodium content.
  • Read the label for “servings per container.” A 14.5-oz can often labels 2.5 servings; eating the whole can means 2.5x the listed sodium.

Frozen broth-based soups (single-serving bags or family- size bricks) are often closer to homemade on sodium and ingredient quality than shelf-stable canned versions and are worth a look.

How soup fits a GLP-1 context

GLP-1 medications produce meaningful weight loss: STEP-1 semaglutide[5] showed −14.9% body weight at 68 weeks; SURMOUNT-1 tirzepatide[6] showed −20.9% at 72 weeks. The most common reason GLP-1 patients struggle with daily eating is not calorie discipline — it is mechanical: nausea, delayed gastric emptying, early satiety, reduced stomach volume. Broth-based soup is unusually well-matched to those constraints, for four reasons:

  • Low volume, dense nutrition. A 1-cup bowl of homemade chicken-lentil soup delivers ~150–200 kcal with ~15–20 g of protein and ~5–7 g of fiber in a small physical volume. Tolerable when a large salad or rice bowl is not.
  • Warm, soft texture is well-tolerated during nausea-dominant titration weeks. Cooked soup is easier on the stomach than cold, raw, or dense foods.
  • Electrolyte and hydration support. GLP-1 patients often experience reduced fluid intake (early satiety affects beverages too) and mild dehydration. Bone-broth and broth-based soups provide ~838–924 mg sodium per cup (when not low-sodium) along with potassium and magnesium — useful during the first few weeks of titration when fluid balance is most unstable. See our GLP-1 water intake calculator for hydration targets.
  • Protein-anchored bowls keep lean mass. Without intentional protein anchoring + resistance training, ~25–40% of GLP-1 weight loss can come from lean tissue. A 1.5-cup bowl of homemade chicken- vegetable-lentil soup hits the per-meal protein threshold (~25–30 g protein) with manageable volume. See our GLP-1 protein calculator for the daily target and per-meal allotment.

GLP-1-friendly soup builds that work:

  • Chicken-lentil-vegetable bowl: 1 cup low-sodium chicken broth + 2 oz cooked shredded chicken + 0.5 cup cooked lentils + 0.5 cup mixed vegetables + herbs. Net: ~250 kcal / ~25 g protein / ~6 g fiber / ~250 mg sodium.
  • Bone broth with egg and tofu: 1.5 cups low-sodium bone broth + 1 soft-boiled egg + 2 oz silken tofu + scallions + sesame oil. Net: ~180 kcal / ~18 g protein / ~280 mg sodium. Useful during nausea-dominant weeks.
  • Miso-tofu-vegetable bowl: 1.5 cups dashi-miso broth (use reduced-sodium miso) + 3 oz silken tofu + bok choy + shiitake + scallions. Net: ~140 kcal / ~15 g protein / ~600 mg sodium.

Pair with the GLP-1 side effect questions hub for nausea-management strategies during titration. Soup is often the first food category GLP-1 patients reach for when solid food becomes uncomfortable.

What to add for protein: turning soup into a meal

Broth-only soup is not a complete meal for weight loss; it is a preload or a starter. To convert soup into a primary meal that clears the ~25–30 g per-meal protein threshold, add one of:

  • Cooked chicken (3 oz cooked = ~21 g protein, ~140 kcal). The most flexible add-in. Works in chicken-noodle, vegetable, tomato, lentil, minestrone, tortilla, miso, and bone-broth bases.
  • Lentils (1 cup cooked = ~18 g protein, ~230 kcal, ~16 g fiber). Plant-protein anchor with the highest fiber load in the protein category.
  • Beans (1 cup cooked black, white, kidney, or pinto = ~14–15 g protein, ~225–245 kcal, ~13–16 g fiber). Plant- protein anchor; rinse canned beans to cut ~40% of the sodium.
  • Tofu (3 oz firm = ~9 g protein, ~70 kcal; 3 oz silken = ~5 g protein, ~50 kcal). Pairs well with miso, dashi, hot-and-sour, and tomato bases.
  • Lean ground beef or turkey (3 oz cooked 90% lean = ~22–23 g protein, ~150–200 kcal). Stirred into a tomato-vegetable base or minestrone-style soup turns it into a primary meal. See our ground beef for weight loss guide for portion mechanics.
  • Eggs (1 large egg = ~6 g protein, ~70 kcal; 2 eggs = ~12 g / 140 kcal). Cracked into a hot broth for egg-drop or stracciatella-style soups.
  • Shrimp (3 oz cooked = ~20 g protein, ~84 kcal). Lowest-fat protein add-in. Works in tomato, tortilla, miso, and tom-yum-style bases.
  • Protein powder stir-in (clear or unflavored): 1 scoop unflavored whey or beef isolate adds ~20–25 g protein for ~110 kcal. Useful for GLP-1 patients struggling to hit per-meal protein on low appetite. See our best protein powder for GLP-1 guide.

Portion and pairing rules

  • Preload tactic: ~150–200 kcal broth-based soup (1 cup) eaten 15 minutes before lunch or dinner typically reduces total meal energy by ~100–150 kcal per Flood & Rolls 2007 Appetite[1]. Daily preload over a week saves ~700–1,000 kcal without conscious portion restriction at the main meal.
  • Primary meal: 1.5–2 cups of protein-anchored soup (250–350 kcal, 20–30 g protein) + a side of leafy greens or a small whole- grain bread (100–150 kcal). Total meal: ~400–500 kcal at high satiety per calorie.
  • Pair broth-only soups with protein. A 1-cup bowl of broth-only chicken noodle (~60 kcal, ~4 g protein) is a preload, not a meal. Add chicken, beans, or eggs to reach the per-meal protein threshold.
  • Watch the bread + crackers + cheese. A small bowl of minestrone (~125 kcal) becomes a ~500–700 kcal meal with a bread bowl, crackers, a panini, or a grilled-cheese side. The soup itself is rarely the calorie problem.
  • Cold soup counts. Gazpacho, cold cucumber, watermelon soup, and chilled tomato-vegetable soups carry the same volumetrics + preload benefit. Use in summer when hot soup is less appealing.
  • Avoid the bread bowl format. A bread bowl adds ~400–600 kcal of refined carb on top of the soup. Sourdough bowls at restaurants commonly double the meal’s calorie load.

Common pitfalls

  • Defaulting to cream-based. A 1.5-cup bowl of cream of mushroom (~250 kcal) vs the same volume of minestrone (~125 kcal) is ~125 kcal per meal, ~700–900 kcal per week if soup is a daily habit.
  • Eating the whole can. Most 14.5-oz cans label ~2.5 servings; the whole-can portion delivers 2.5x the listed calories and sodium. Read the label, weigh the bowl, or split with a partner.
  • Treating soup as a beverage. A bowl of dense lentil soup (~250 kcal) is a small meal, not a beverage. Track it as a meal in calorie apps.
  • Ignoring sodium. Regular canned soup can deliver 40–60% of the AHA <2,300 mg/day sodium ceiling[8] in one bowl. People with hypertension, heart failure, or kidney disease should choose low-sodium versions and limit to once or twice weekly.
  • Using soup as the only meal. Broth-only soup without a protein anchor produces hunger return within ~1–2 hours. Add protein every bowl.
  • Bread bowl + crackers + cheese stack. A ~125 kcal bowl of minestrone in a sourdough bread bowl with crackers and a grilled-cheese side hits ~700–900 kcal. The soup is the lean part; the accompaniments are not.
  • Restaurant soup overestimation. Restaurant cup vs bowl serving sizes vary 1.5–3x and cream-based versions often exceed 400–500 kcal per bowl. Ask for the cup-size portion and skip the bread.
  • Instant ramen as “soup.” Most instant ramen packets deliver ~380–500 kcal per packet with 1,500–2,000 mg sodium and ~14 g of fat. Not the same nutritional category as broth- based vegetable or chicken soup.

Bottom line

  • Soup is one of the best-evidenced low-energy-density foods for weight loss, especially as a preload before a meal. The Flood & Rolls 2007 Appetite RCT[1] showed a ~270 kcal soup preload cut total meal energy by ~134 kcal (~20%) regardless of soup form (broth, chunky, pureed, chunky-pureed).
  • The mechanism is water-incorporated-into-food satiety. Rolls 1999 AJCN[2]: same casserole blended into soup form cut total meal intake ~26% vs the casserole eaten with a separate glass of water. Water in the food works; water on the side does not.
  • The 12-month RCT signal favors a soup-rich, low-energy-density pattern. Ello-Martin 2007 AJCN[3] in 97 obese women: low-energy-density counseling (soup, fruit, vegetables, broth bases) produced −7.9 kg vs −6.4 kg for fat- reduction-only group at 1 year.
  • Broth-based vs cream-based is the load-bearing decision. Broth-based soups run ~36–139 kcal/cup; cream- based versions run ~150–200+ kcal/cup — 2 –3x at the same physical volume per USDA[7].
  • Sodium is the real pitfall. Regular canned soup typically delivers 600–1,000 mg sodium per cup; one bowl can hit 40–60% of the AHA <2,300 mg/ day ceiling[8] and the DGA same target[9]. Choose low-sodium (≤140 mg/serving) or homemade.
  • Best-evidence soup styles: lentil, minestrone, miso, chicken-vegetable, gazpacho, hearty bean. Worst: chowders, cream-based, cheese bisques, lobster bisque, French onion with the cheese-and-bread crown.
  • Add protein to every bowl. Broth-only soup is a preload; protein-anchored soup is a meal. 3 oz chicken (~21 g protein), 1 cup cooked lentils (~18 g), 1 cup beans (~14–15 g), 3 oz tofu (~9 g), or 3 oz shrimp (~20 g) converts a starter into a primary meal.
  • GLP-1 use case: broth-based soup is one of the most reliable food categories during nausea-dominant titration on semaglutide or tirzepatide — low-volume, warm, soft texture, electrolyte support, easy to load with protein. Pair with the GLP-1 protein and water tools for daily targets.
  • Magnitude vs GLP-1s: STEP-1 semaglutide[5] −14.9% body weight at 68 weeks; SURMOUNT-1 tirzepatide[6] −20.9% at 72 weeks. Soup is a useful tactical tool inside a weight-loss eating plan, not a weight-loss intervention.
  • The verdict: yes for broth-based with vegetables and lean protein, eaten as a preload or protein-anchored primary meal, 2–3+ times per week within a calorie-controlled eating pattern; no for daily cream- based chowders, cheese bisques, and bread-bowl stacks.

Related research and tools

Important disclaimer. This article is educational and does not constitute medical or nutrition advice. Patients with hypertension, heart failure, chronic kidney disease, or sodium-restricted dietary prescriptions should choose low-sodium soup versions and discuss frequency with their clinician. Patients with phenylketonuria should avoid aspartame-sweetened soup-base products. Patients on semaglutide, tirzepatide, or other GLP-1 receptor agonists should not use soup-based preloading as a substitute for clinician-directed dose titration or for management of persistent nausea, vomiting, or signs of pancreatitis. PMIDs were independently verified against the PubMed E-utilities API on 2026-05-25; per-cup nutrient values are drawn from USDA FoodData Central and carry typical food- database variance.

Last verified: 2026-05-25. Next review: every 12 months, or sooner if major new evidence on low-energy-density eating, soup preloading, or sodium-and- cardiometabolic risk is published.

References

  1. 1.Flood JE, Rolls BJ. Soup preloads in a variety of forms reduce meal energy intake. Appetite. 2007. PMID: 17574705.
  2. 2.Rolls BJ, Bell EA, Thorwart ML. Water incorporated into a food but not served with a food decreases energy intake in lean women. Am J Clin Nutr. 1999. PMID: 10500012.
  3. 3.Ello-Martin JA, Roe LS, Ledikwe JH, Beach AM, Rolls BJ. Dietary energy density in the treatment of obesity: a year-long trial comparing 2 weight-loss diets. Am J Clin Nutr. 2007. PMID: 17556681.
  4. 4.Ello-Martin JA, Ledikwe JH, Rolls BJ. The influence of food portion size and energy density on energy intake: implications for weight management. Am J Clin Nutr. 2005. PMID: 16002828.
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  7. 7.U.S. Department of Agriculture, Agricultural Research Service. FoodData Central — Soups, canned and prepared (chicken broth, chicken noodle, tomato, cream of mushroom, lentil, minestrone, miso, clam chowder). USDA FoodData Central. 2025. https://fdc.nal.usda.gov/
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