Carrots for weight loss

Calorie density in carrots

Calorie density is the number of calories in a given weight of food. Foods low in calorie density let you eat large, satisfying portions for relatively few calories. At about 41 calories per 100 grams, or about 3/4 cup chopped, per USDA FoodData Central, carrots sit near the bottom of the scale.

• 1 medium carrot: about 25 calories
• 1 small bag of potato chips (1 oz): about 150 calories
• 1 granola bar: 120 to 200 calories or more

You'd need to eat 6 medium carrots to match the calories in that small bag of chips. You also can't eat 6 carrots as quickly or as absentmindedly as you can finish a bag of chips. The volume, the crunch and the chewing all slow you down.

The evidence here is better than most food claims get. In a year-long trial at Penn State, 97 women with obesity were counseled either to cut fat or to cut fat and eat more water-rich foods, particularly fruit and vegetables. Neither group got a calorie target. Among the 71 who finished, the produce group lost 7.9 kg and the other group 6.4 kg, and the produce group reported less hunger. That's a difference of 1.5 kg over a year, in one study of women. It isn't dramatic, and it came with less hunger, which is what keeps people going.

Fiber in carrots

A medium carrot has about 1.7 grams of fiber. That doesn't sound like much until you see the target: the FDA's Daily Value for fiber is 28 grams, and it takes a lot of plant foods to get there. Every little bit counts.

The best carrot-specific study comes from the University of Ulster. In a crossover study published in the British Journal of Nutrition, young women ate a mixed lunch of rice, chicken and sauce with 200 grams of carrots in one of three forms: whole, blended, or as carrot nutrients with the fiber and structure removed. Whole and blended carrots both produced more fullness than the nutrient version, and later food intake fell in step: highest after the nutrients, lower after blended, lowest after whole.

Two caveats belong here. About 34 young women is a small group, and 200 grams is about 3 medium carrots at one meal. Still, the direction is useful: both the fiber and the physical structure of the carrot seem to matter, which is one reason whole carrots beat juice.

Fiber helps in a few ways:

• It slows digestion. The soluble fiber in carrots, pectin, forms a gel-like substance that slows things down, which can help you stay full longer.
• It may trim calorie absorption slightly. Fiber can reduce the absorption of some calories from other foods in the meal. The effect is small, so don't count on it.
• It feeds your gut. Beneficial gut bacteria ferment fiber, and that's a good thing for gut health.
• It steadies blood sugar. Fiber slows the rise in blood sugar after a meal.

Carrots contain both kinds of fiber. The soluble pectin helps with fullness and blood sugar, while the insoluble fiber (cellulose, hemicellulose and lignin) adds bulk and helps prevent constipation, a common complaint when people cut calories.

Key micronutrients in carrots

Beyond the macros, carrots bring several vitamins and minerals. The percentages below are for 1 cup of chopped raw carrots, against the FDA's Daily Values.

• Vitamin A, as beta-carotene: the orange pigment your body converts to vitamin A, essential for immune function and vision. One cup provides more than 100% of the Daily Value.
• Vitamin K1: important for blood clotting and bone health, about 14% of the Daily Value.
• Potassium: supports heart health and blood pressure regulation, about 9% of the Daily Value.
• Vitamin C: about 8% of the Daily Value. A 2005 review reported that people with adequate vitamin C burned about 30% more fat during moderate exercise than people with low status, and suggested low status may make fat loss harder. That's a reason to avoid running low, not a reason to expect carrots to burn fat.
• Other notable nutrients: B vitamins, including vitamin B6.

Beta-carotene is fat-soluble, which is one reason a little fat alongside carrots is worth having.

Raw vs cooked carrots

This is one of the most common questions, and the answer is that both are good, just slightly different.

Raw and cooked carrots compared

The beta-carotene gap is real. In a lab digestion study, 3% of the beta-carotene was released from raw carrot pieces, 27% from cooked carrot pulp and 39% once cooking oil was added. That's a test-tube model, not people eating dinner, but it points the same way as the advice to eat carrots with a little fat. Raw carrots still deliver plenty.

For weight loss, the difference is minimal. Choose based on what helps you stay consistent. If you love crunchy snacks, raw carrots are your friend. If you prefer warm vegetables with dinner, that works too.

Fresh whole carrots

• What to look for: firm, smooth carrots with vibrant color, whether that's orange or a specialty purple, yellow or red. Skip anything limp, rubbery or soft in spots. The surface should be free from deep cracks or excessive root hairs.
• The green top test: if the tops are still attached, they should look fresh, not wilted or yellowed. Remove them before storing, since they draw moisture from the root.
• Size: medium carrots, 6 to 7 inches, suit most uses. Very large ones can be tough and woody in the center. Very small ones are tender but cost more per pound.
• Budget: whole carrots are almost always cheaper per pound than baby carrots or pre-cut options. You're paying for convenience with those ready-to-eat bags.

Baby carrots

Most "baby carrots" aren't babies at all. They're regular carrots cut and peeled into uniform 2-inch pieces. True baby carrots are harvested young and taste slightly sweeter.

Choose bags with a best-by date at least 10 to 14 days out. Look for white blush, a harmless surface dehydration that looks like a white coating. It isn't a problem, but fresher carrots won't have it yet.

Baby carrots make sense when convenience is the priority. They're pre-washed and grab-and-go. You pay more per pound, and if that means you'll eat them instead of skipping the snack, it's worth the premium.

In the U.S. you can get carrots from California year-round. For the freshest local options, shop in late spring and fall, then stock up and freeze some.

Organic vs conventional carrots

Fruits and vegetables can absorb pesticides. Even so, eating conventionally grown carrots is better than not eating carrots at all.

Choose organic if you have the budget and prefer to minimize pesticide exposure, or if you're feeding young children. Conventional is fine if budget is a concern. Just wash them thoroughly under running water with a vegetable brush.

Specialty carrot varieties

• Purple carrots: contain anthocyanins, the same antioxidants in blueberries, along with beta-carotene. Slightly earthier flavor.
• Yellow carrots: milder and slightly sweeter than orange. They contain xanthophylls in addition to beta-carotene, which can support eye health.
• Red carrots: a bit sweeter than orange, with lycopene, the antioxidant also found in tomatoes.

All colors work equally well for weight loss. Choose based on taste and what's available.

Carrot storage tips

• Refrigerator: keep whole carrots in a plastic bag with some airflow in the crisper drawer. They'll last a few weeks.
• Baby carrots: keep them in the original packaging or an airtight container, and use within 2 weeks.
• Cut carrots: store in water in an airtight container in the fridge to keep the crunch. Change the water every 2 to 3 days and use within 5 to 7 days.
• Freezing: boil sliced carrots for 2 minutes, cool in ice water, drain and freeze in bags. They're great for cooked dishes, but the texture won't work for raw eating.

Sunday carrot meal prep

• For raw snacking: wash and peel 10 to 15 medium carrots and cut them into 3 to 4 inch sticks. Portion into 5 to 7 small containers or bags, one per day, and keep them at the front of the fridge where you'll see them first.
• For cooked meals: peel and chop 2 pounds of carrots and store them in an airtight container. Pull out portions through the week for soups, stir-fries or roasted vegetables.
• A small extra: cut a few carrots into small cubes and store them separately. They work well in scrambled eggs, omelets or grain bowls for a quick boost.

Washing & peeling carrots

Wash every carrot, organic ones included, under running water. Use a vegetable brush to scrub away dirt or residue.

The skin contains nutrients and fiber, so you can eat carrots unpeeled once they're scrubbed. Peeling can remove some pesticide residue and improve texture for picky eaters. It's your choice.

For speed, use a Y-shaped peeler. Hold the carrot over a bowl or sink and peel in long strokes from top to bottom, rotating as you go. It takes 15 to 20 seconds per carrot.

How to cut carrots

• Sticks, for snacking: cut into 3 to 4 inch lengths, then quarter lengthwise. Good for dipping and easy to grab.
• Coins, for cooking: slice crosswise into 1/4-inch rounds. They cook evenly and quickly, so they suit roasting or sauteing.
• Dice, for mixing: cut into 1/4-inch cubes for soups, stews, stir-fries and other mixed dishes.
• Shredded, for salads: use a box grater or food processor to add texture to slaws and salads.
• Julienne, when you have time: cut into thin matchsticks. It takes longer but looks sharp and suits stir-fries.

Cooking methods for carrots

Five ways to cook carrots

A tablespoon of olive oil is about 120 calories, so a pound of roasted carrots picks up that much across the batch. It's worth measuring rather than pouring.

Washing carrots safely

• Always wash. Even if carrots look clean, wash them under running water before eating or cooking. A vegetable brush helps, especially in the grooves where dirt collects.
• No soap needed. Plain water is enough. The FDA says soap, detergent and commercial produce washes aren't recommended, since produce is porous and can absorb them.
• Wash right before use. The exception is meal prep: wash, dry thoroughly with paper towels and store properly.

Safe carrot storage times

How long carrots keep

The 3 to 4 day limit on cooked carrots follows the FDA's storage chart, which gives 3 to 4 days for vegetable soups and stews. We use the same limit here.

Carrots & cross-contamination

The FDA's advice is to use one cutting board for produce and a separate one for raw meat, poultry and seafood. If you only have one board, prepare vegetables first, then wash it with hot, soapy water before cutting raw meat. Wash your hands with soap for at least 20 seconds after handling raw meat and before touching any other food, vegetables included.

Signs carrots have gone bad

Throw carrots out if you see:

• A slimy texture or sticky coating, which indicates bacterial growth
• A foul or rotten smell. They should smell earthy and slightly sweet, never sour
• Completely soft, mushy flesh, a sign of advanced spoilage
• Black or dark brown discoloration throughout, which is different from harmless surface oxidation
• Mold throughout the carrot

They're still fine if you see:

• White blush on the surface. That's dehydration, so rinse it off and eat
• A slight limpness with some firmness left. Soak them in ice water for 30 minutes to crisp them up
• Small brown spots on the surface. Cut them away and the rest is fine
• Tiny root hairs growing. They're harmless, so cut them off if you want
• A small spot of mold on a firm carrot. UConn Extension says to cut at least 1 inch around and below the spot, keeping the knife out of the mold