10 Best Weight-Loss Drinks (Ranked by Evidence, Not Hype)

Key takeaways

• Drinking 500 mL of water before each meal on a reduced-calorie diet led to about 2 kg more weight loss over 12 weeks in older adults.^[1]
• Adding sugar-sweetened drinks to adults' diets in trials led to 0.85 kg more weight gain.^[2]
• Replacing sugary drinks with low- or no-calorie sweetened drinks was linked with 1.06 kg lower weight across 17 trials.^[3]
• The WHO conditionally advises against using non-sugar sweeteners for weight control.^[6]

In short: The best drinks for weight loss are the ones that replace sugary drinks and add few or no calories. Water tops the list: in a 12-week trial, adults who drank about 2 cups (500 mL) before each meal lost about 2 kg (4.4 lb) more than those on the same diet without it. Sparkling water, unsweetened tea and black coffee follow, then protein-rich drinks such as skim milk and unsweetened soy milk. No drink burns fat on its own; what matters is what it replaces.

This list ranks drink types, not brands, using diet research and USDA nutrition data. Every calorie, protein and caffeine number is calculated from the USDA’s FoodData Central database for a 12-ounce serving (about the size of a can). If you’re looking for whole meals in a glass, see our high-protein smoothies or meal-replacement shakes; for snacks, see our healthy snacks guide. This is general nutrition information; if you have kidney or heart problems, diabetes or are pregnant, ask your clinician how much fluid and caffeine suit you.

Why drinks matter more than you’d think

Calories you drink are easy to miss. In a small crossover study, people given about 450 calories a day as soda didn’t eat less to make up for it, and their weight went up; when the same calories came as jelly beans, they ate less at other times. Larger reviews point the same way: in a 2013 meta-analysis, adults in trials who had sugar-sweetened drinks added to their diet gained 0.85 kg (about 2 lb) more than those who didn’t, and in long-term studies each extra daily serving was linked with weight gain over a year. So the biggest “weight-loss drink” win for most people is a swap: a zero-calorie or protein-rich drink in place of soda, sweet tea, juice or sweetened coffee.

Water0 kcal

Sparkling water (club soda)0 kcal

Black coffee4 kcal

Brewed green tea4 kcal

Diet cola7 kcal

Low-sodium vegetable juice72 kcal

Unsweetened soy milk120 kcal

Skim milk125 kcal

Regular beer153 kcal

Regular cola155 kcal

Plain low-fat kefir157 kcal

Energy drink (sugared)159 kcal

Orange juice183 kcal

Calories in 12 fl oz of common drinks

Item	Value
Water	0 kcal
Sparkling water (club soda)	0 kcal
Black coffee	4 kcal
Brewed green tea	4 kcal
Diet cola	7 kcal
Low-sodium vegetable juice	72 kcal
Unsweetened soy milk	120 kcal
Skim milk	125 kcal
Regular beer	153 kcal
Regular cola	155 kcal
Plain low-fat kefir	157 kcal
Energy drink (sugared)	159 kcal
Orange juice	183 kcal

Milk, soy milk and kefir bring 10 to 14 g of protein for their calories; cola, energy drinks and juice bring 31 to 38 g of sugar and no protein.

Source: USDA FoodData Central (SR Legacy); InstaTuck calculation for 12 fl oz (checked on October 6, 2026)

The 10 best drinks for weight loss

How we ordered them, following our foods and drinks method: drinks with evidence for helping weight loss or replacing sugary drinks come first; then fullness and protein for the calories; then calories per serving; then cost and how easy they are to find. Zero-calorie drinks lead because research on liquid calories shows they rarely fill you up the way food does.

The 10 best weight-loss drinks, ranked by evidence

1. 1

   1. Water (still or tap)

   Best for Everyone; before meals

   • 0 kcal
   • about 500 mL (2 cups) before each meal added about 2 kg weight loss over 12 weeks in one trial
   • no caffeine

   Maker-stated specs

   Price Free from the tap (checked Oct 6, 2026)

   Drawback Plain taste; the before-meal trial included only adults aged 55 to 75

2. 2

   2. Sparkling water, unsweetened

   Best for Replacing soda's fizz

   • 0 kcal
   • no sugar
   • club soda has about 75 mg sodium per 12 oz

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback Flavored versions can contain sugar or sweeteners; read the label

3. 3

   3. Unsweetened tea (green, black or herbal)

   Best for Hot or iced drinks with flavor

   • About 4 kcal per 12 oz
   • caffeine about 43 mg (green) or 71 mg (black), none in most herbal

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback Green tea's effect on weight itself was not meaningful in a Cochrane review

4. 4

   4. Black coffee

   Best for Coffee drinkers cutting cream and sugar

   • About 4 kcal per 12 oz
   • about 142 mg caffeine
   • no sugar

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback Caffeine adds up; cream, sugar and syrups add calories fast

5. 5

   5. Skim (fat-free) milk

   Best for Protein with a meal or after exercise

   • 125 kcal and 12.4 g protein per 12 oz
   • vitamins A and D added

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback Has calories, so count it as food; not for milk allergy or lactose intolerance

6. 6

   6. Unsweetened soy milk

   Best for A dairy-free protein drink

   • 120 kcal and 10.4 g protein per 12 oz
   • 1.5 g sugar
   • calcium and vitamins A and D added

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback "Original" and vanilla versions often add sugar; contains soy

7. 7

   7. Plain low-fat kefir

   Best for A tangy, fermented protein drink

   • 157 kcal and 13.8 g protein per 12 oz
   • no added sugar in plain

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback Flavored kefirs add sugar; the most calories of the protein drinks here

8. 8

   8. Homemade high-protein smoothie

   Best for Replacing a meal

   • About 200 to 380 kcal with 20 to 27 g protein in our recipes
   • whole fruit adds fiber

   Maker-stated specs

   Price Grocery staples (checked Oct 6, 2026)

   Drawback A smoothie is a meal, not a drink on the side

9. 9

   9. Low-sodium vegetable juice

   Best for A savory swap for fruit juice

   • 72 kcal per 12 oz, vs 183 for orange juice
   • 10.6 g sugar

   Maker-stated specs

   Price Grocery staple (checked Oct 6, 2026)

   Drawback Little fiber or protein; regular versions are high in sodium

10. 10

    10. Diet soda and other zero-calorie sweetened drinks

    Best for A stepping stone off sugary soda

    • About 0 to 7 kcal per 12 oz
    • replacing sugary drinks with them was linked with 1.06 kg lower weight in trials

    Maker-stated specs

    Price Grocery staple (checked Oct 6, 2026)

    Drawback The WHO advises against relying on non-sugar sweeteners for weight control; water is the better long-term choice

All 10 drinks side by side

#	Pick	Best for	Key specs (maker-stated)	Price range	Last checked
1	Water (still or tap)	Everyone; before meals	0 kcal; about 500 mL (2 cups) before each meal added about 2 kg weight loss over 12 weeks in one trial; no caffeine	Free from the tap	Oct 6, 2026
2	Sparkling water, unsweetened	Replacing soda's fizz	0 kcal; no sugar; club soda has about 75 mg sodium per 12 oz	Grocery staple	Oct 6, 2026
3	Unsweetened tea (green, black or herbal)	Hot or iced drinks with flavor	About 4 kcal per 12 oz; caffeine about 43 mg (green) or 71 mg (black), none in most herbal	Grocery staple	Oct 6, 2026
4	Black coffee	Coffee drinkers cutting cream and sugar	About 4 kcal per 12 oz; about 142 mg caffeine; no sugar	Grocery staple	Oct 6, 2026
5	Skim (fat-free) milk	Protein with a meal or after exercise	125 kcal and 12.4 g protein per 12 oz; vitamins A and D added	Grocery staple	Oct 6, 2026
6	Unsweetened soy milk	A dairy-free protein drink	120 kcal and 10.4 g protein per 12 oz; 1.5 g sugar; calcium and vitamins A and D added	Grocery staple	Oct 6, 2026
7	Plain low-fat kefir	A tangy, fermented protein drink	157 kcal and 13.8 g protein per 12 oz; no added sugar in plain	Grocery staple	Oct 6, 2026
8	Homemade high-protein smoothie	Replacing a meal	About 200 to 380 kcal with 20 to 27 g protein in our recipes; whole fruit adds fiber	Grocery staples	Oct 6, 2026
9	Low-sodium vegetable juice	A savory swap for fruit juice	72 kcal per 12 oz, vs 183 for orange juice; 10.6 g sugar	Grocery staple	Oct 6, 2026
10	Diet soda and other zero-calorie sweetened drinks	A stepping stone off sugary soda	About 0 to 7 kcal per 12 oz; replacing sugary drinks with them was linked with 1.06 kg lower weight in trials	Grocery staple	Oct 6, 2026

What the research says about each

Water. In the Virginia Tech trial, 48 adults aged 55 to 75 followed a reduced-calorie diet; half also drank 500 mL of water before each meal. After 12 weeks the water group had lost about 2 kg more, a 44% greater decline. At the start, a water “preload” cut the calories people ate at a test meal (498 vs 541 calories). It’s a simple, free habit, though this was one small trial in older adults.

Tea and coffee. Both are nearly calorie-free when unsweetened, which makes them excellent swaps. Claims that they “burn fat” are another matter: a Cochrane review of green tea preparations found an average weight difference of just 0.04 kg in trials outside Japan, too small to matter. Caffeine is the other thing to watch. The FDA says about 400 mg a day, roughly two to three 12-ounce cups of coffee, is not generally associated with negative effects for most adults; if you are pregnant, trying to become pregnant or breastfeeding, ask your clinician. Concentrated green tea extract pills are a different product; see our green tea extract page.

Brewed coffee142 mg

Energy drink107 mg

Brewed black tea71 mg

Brewed green tea43 mg

Diet cola43 mg

Regular cola33 mg

Herbal tea0 mg

Caffeine in 12 fl oz

Item	Value
Brewed coffee	142 mg
Energy drink	107 mg
Brewed black tea	71 mg
Brewed green tea	43 mg
Diet cola	43 mg
Regular cola	33 mg
Herbal tea	0 mg

FDA cites about 400 mg a day as not generally associated with negative effects for most adults. Brewing strength varies widely.

Source: USDA FoodData Central (SR Legacy); InstaTuck calculation for 12 fl oz (checked on October 6, 2026)

Milk, soy milk and kefir. These have calories, so they belong in your daily total, but they also bring 10 to 14 grams of protein per 12 ounces. Protein is the most filling nutrient, and higher-protein diets help people keep muscle while losing weight; our high-protein diet guide and protein calculator explain how much you might aim for. A glass of milk with breakfast or after a walk can replace a sweetened coffee drink or juice.

Diet drinks. The evidence here is mixed, and we rank them last for that reason. A 2022 meta-analysis of 17 trials found that replacing sugary drinks with low- or no-calorie sweetened drinks was linked with 1.06 kg lower weight, a similar direction to switching to water. But the World Health Organization’s 2023 guideline conditionally recommends against using non-sugar sweeteners for weight control, saying they don’t provide a long-term benefit in reducing body fat (the guideline does not apply to people with diabetes). A reasonable reading: diet soda can help you step off regular soda, and water is where to land.

A day of better drinks

When	Instead of	Try	Calories saved (12 oz, USDA)
Breakfast	Orange juice (183 kcal)	Black coffee or tea, plus a piece of whole fruit	About 179 for the drink itself
Before lunch	Nothing, or a soda	About 2 cups of water	Up to 155 if it replaces a cola
Afternoon	Sugared energy drink (159 kcal)	Iced green tea or sparkling water	About 155 to 159
After a walk or workout	Sugared energy drink (159 kcal)	Skim milk or unsweetened soy milk for 10 to 12 g protein	About 35 to 40, plus protein
Dinner	Regular beer (153 kcal)	Sparkling water with lime	About 153

You don’t need to change every drink at once. Pick the one you have most often, swap it for two weeks and see how it feels. Keeping a filled water bottle in sight, adding citrus, cucumber or mint, and choosing a favorite herbal tea for the evening make the new habit easier. If you track food, log drinks too: their calories are easy to forget.

Drinks to limit

• Regular soda, sweet tea and energy drinks: about 155 to 160 calories and 37 to 38 grams of sugar per 12 ounces of cola or a sugared energy drink, with no protein or fiber.
• Fruit juice: 183 calories and 31 grams of sugar in 12 ounces of orange juice. Whole fruit fills you up more for the same calories; see our most filling foods.
• Alcohol: 153 calories in a 12-ounce regular beer, with no protein or fiber.
• Coffee-shop drinks with syrup, whipped cream or whole milk: check the menu’s calorie count before you order.
• “Detox”, “fat-burning” or “slimming” teas and drinks: no drink causes fat loss on its own, and some products marketed for weight loss have been found to contain hidden drugs. Our fat burners page covers the evidence.

Easy swaps that add up

Small daily swaps can make a real difference to a calorie deficit: 155 calories a day is about 1,085 calories a week. Our calorie calculator estimates your daily needs, and the weight loss calculator shows a realistic timeline. For more ideas on eating and drinking well, visit the nutrition hub or browse the 10 best diets for weight loss.

What a drink can’t do

No drink burns off fat, resets your metabolism or “flushes” weight, despite the marketing. The drinks on this list help in two plain ways: they replace higher-calorie drinks, and some help you feel a little fuller or get more protein. Pair them with filling meals, regular movement such as walking, and enough sleep, and the small changes add up. Weight-loss myths about drinks and more are checked in 12 weight-loss myths science has busted.

Questions to ask a professional

• How much fluid should I drink each day with my health conditions?
• Is my caffeine intake safe with my medicines or blood pressure?
• Are diet drinks a reasonable choice for me, given my blood sugar?
• Which protein-rich drinks fit my diet and allergies?

Frequently asked questions

What is the best drink for weight loss?

Water. It has no calories, and in a 12-week trial, drinking 500 mL before each meal on a reduced-calorie diet led to about 2 kg more weight loss. Unsweetened tea, black coffee and sparkling water are also good swaps for sugary drinks.

Does green tea help you lose weight?

Not meaningfully on its own. A Cochrane review found an average weight difference of 0.04 kg in trials outside Japan. Unsweetened green tea is still a good zero-calorie drink.

Is diet soda okay when losing weight?

As a replacement for regular soda, trials linked it with about 1 kg lower weight. The WHO advises against relying on non-sugar sweeteners for weight control, so water is the better long-term choice.

Are fat-burning or detox drinks real?

No drink burns fat or removes weight on its own. Some products sold for weight loss have been found by the FDA to contain hidden drugs.

How much coffee is safe while dieting?

The FDA says about 400 mg of caffeine a day, roughly two to three 12-ounce cups of coffee, is not generally associated with negative effects for most adults. Pregnant or breastfeeding people should ask their clinician.

References

1. Dennis EA, Dengo AL, Comber DL, et al.. Water consumption increases weight loss during a hypocaloric diet intervention in middle-aged and older adults. Obesity, 2010. doi:10.1038/oby.2009.235 · PMID 19661958 (accessed October 7, 2026) Randomized trial
2. Malik VS, Pan A, Willett WC, Hu FB. Sugar-sweetened beverages and weight gain in children and adults: a systematic review and meta-analysis. American Journal of Clinical Nutrition, 2013. doi:10.3945/ajcn.113.058362 · PMID 23966427 (accessed October 6, 2026) Meta-analysis
3. McGlynn ND, Khan TA, Wang L, et al.. Association of Low- and No-Calorie Sweetened Beverages as a Replacement for Sugar-Sweetened Beverages With Body Weight and Cardiometabolic Risk: A Systematic Review and Meta-analysis. JAMA Network Open, 2022. doi:10.1001/jamanetworkopen.2022.2092 · PMID 35285920 (accessed October 6, 2026) Meta-analysis
4. Jurgens TM, Whelan AM, Killian L, et al.. Green tea for weight loss and weight maintenance in overweight or obese adults. Cochrane Database of Systematic Reviews, 2012. doi:10.1002/14651858.CD008650.pub2 · PMID 23235664 (accessed October 7, 2026) Meta-analysis
5. DiMeglio DP, Mattes RD. Liquid versus solid carbohydrate: effects on food intake and body weight. International Journal of Obesity, 2000. doi:10.1038/sj.ijo.0801229 · PMID 10878689 (accessed October 6, 2026) Other
6. WHO advises not to use non-sugar sweeteners for weight control in newly released guideline. World Health Organization, 2023. (accessed October 7, 2026) Guideline
7. Spilling the beans: how much caffeine is too much?. U.S. Food and Drug Administration. (accessed October 7, 2026) Government page
8. FoodData Central (SR Legacy, April 2018 release). U.S. Department of Agriculture, Agricultural Research Service, 2018. (accessed October 7, 2026) Government page
9. Leidy HJ, Clifton PM, Astrup A, et al.. The role of protein in weight loss and maintenance. American Journal of Clinical Nutrition, 2015. doi:10.3945/ajcn.114.084038 · PMID 25926512 (accessed October 7, 2026) Review
10. Weight loss product notifications (tainted products). U.S. Food and Drug Administration. (accessed October 7, 2026) Government page

Facts checked on October 6, 2026

Educational information, not medical advice. Talk with a qualified healthcare professional about your own situation. In an emergency call 911.