A strawberry is not a true berry. The juicy red part is the swollen base of the flower. The “seeds” on the outside are the real fruits: tiny dry ones called achenes, each holding one seed. They make up only about 1% of a strawberry’s weight but about 11% of its phenolic compounds, a group of plant antioxidants.
The strawberry in stores is also young. It first appeared in early 18th-century Europe, when two wild American species met. The Virginia strawberry came from eastern North America. Amédée-François Frézier brought the Chilean strawberry back from Chile in 1714.
Each parent has eight sets of chromosomes, and so does their hybrid.
Gram for gram, strawberries have more vitamin C than oranges, in the USDA data we use. They have 58.8 mg per 100 g, against 53.2 mg in raw oranges.
Many of the human trials below used freeze-dried strawberry powder or drinks instead of fresh fruit. Many were funded by the California Strawberry Commission, an industry body. So each card says what was eaten, and who paid when the paper says so.
Health benefits of strawberries
The top findings from 29 studies, strongest evidence first
What the stars mean
- Strong. Several randomized trials, pooled in a meta-analysis, point the same way, or regulators (FDA or EFSA) have approved the claim.
- Moderate. Good randomized trials support it, but there are fewer of them, or their results vary.
- Limited. Small, short or single trials, or mixed results. Promising, but it needs confirmation.
Population and lab studies get no stars: they show a link or a mechanism, not proof.
How we rate evidence →- ★★Lower CRP, a marker of inflammationCRP, a blood marker of inflammation, fell by 0.63 mg/L across 11 trials of strawberry fruit, powder or drinks. A second review of 14 trials of strawberry supplements found a fall of 0.47 mg/L.
- ★★Lower cholesterol in some analysesOne review found no overall effect, but total cholesterol fell by 0.52 mmol/L in people who started above 5 mmol/L. A review of strawberry supplements found total cholesterol 6.5 mg/dL lower.
- ★★No clear effect on blood pressureEight trials together found no clear change in blood pressure, and the small changes could be chance. A review of 14 supplement trials found the bottom number 2.2 mm Hg lower.
- ★★Mixed results for fasting blood sugarIn 14 trials of strawberry supplements, fasting blood sugar rose by 2.1 mg/dL. A review of 11 trials of strawberry fruit, powder or drinks found no effect.
- ★Smaller insulin and sugar response after carbsIn 24 overweight adults, a strawberry drink made the insulin response smaller after a high-carbohydrate meal. Strawberry puree improved white bread’s blood sugar profile by 36% in healthy women.
All 29 studies, strongest evidence first
Pooled trials: strawberries lowered the inflammation marker CRP by 0.63 mg/L
This meta-analysis pooled 11 randomized trials (people put into groups by chance) of strawberry fruit, powder or drinks. The main analyses found no effect on blood pressure, cholesterol, triglycerides or fasting blood sugar. In people who started with total cholesterol above 5 mmol/L (a unit for blood levels), it fell 0.52 mmol/L. LDL (“bad”) cholesterol fell 0.31 mmol/L when it started above 3 mmol/L.
In 14 trials, supplements lowered cholesterol and CRP but raised blood sugar
This meta-analysis pooled 20 groups from 14 randomized trials of strawberry supplements. Total cholesterol fell 6.5 mg/dL and CRP 0.47 mg/L, but fasting blood sugar rose 2.1 mg/dL. Oxidized LDL fell 5.8 ng/mL and diastolic blood pressure (the bottom number) 2.2 mm Hg, while other risk factors did not change. The authors say larger, longer and better powered trials are needed.
Eight trials together found that strawberries did not lower blood pressure
This meta-analysis pooled 8 randomized trials. Systolic pressure (the top number) changed by 0.96 mm Hg and diastolic by -0.33 mm Hg, and both changes could be chance. In subgroups, powder at 25 g a day or less, and age under 50, went with a small rise in systolic pressure. The authors say more trials are needed.
50 g freeze-dried strawberries daily lowered LDL cholesterol by 28 mg/dL
In this randomized trial, 60 adults with belly fat and high blood fats (BMI 36) had a daily drink for 12 weeks. It held 25 g or 50 g of strawberries, or none (a matched control drink). At 50 g, total cholesterol fell 33 mg/dL and the drops stayed clear against control, while 25 g did not change LDL. Triglycerides, HDL (“good” cholesterol) and blood pressure did not change, and a California Strawberry Commission grant supported the work.
13 g powder daily cut total cholesterol 2.8%; 40 g did not
In this double-blind crossover trial, 40 adults with overweight or obesity and raised LDL took each dose and a placebo for 4 weeks. Only the lower dose lowered total cholesterol against placebo. LDL was 4.9% lower on 13 g than on 40 g, but not lower than on placebo. Vascular function and inflammation markers did not change, and the California Strawberry Commission and Penn State funded the study.
Two 25 g servings of strawberry powder daily did not lower LDL
In this double-blind crossover trial (nobody knew who took what), 34 adults with moderately high cholesterol drank the freeze-dried powder for 4 weeks. Fasting total cholesterol, triglycerides, glucose, CRP, blood pressure and artery widening did not change. One hour after a 50 g dose, artery widening was 1.5% higher, and at 2 hours systolic pressure was 3.1 mm Hg lower. The California Strawberry Commission funded the study.
500 g of fresh strawberries daily lowered LDL cholesterol by 13.7%
Healthy volunteers ate whole strawberries, not powder, for 1 month. Changes were measured against each person’s own baseline (starting level). Total cholesterol fell 8.78% and triglycerides 20.8%, and markers of oxidative stress and platelet activation also improved. Everything returned to baseline after the washout.
454 g of strawberries a day reduced oxidative damage to LDL
This randomized crossover trial included 28 people with high blood fats who had followed a cholesterol-lowering diet for about 2.5 years. The diet included soy, viscous fiber, plant sterols and nuts, and strawberries or oat bran bread were added for a month. LDL cholesterol did not fall any further: it stayed 13.4% below its starting level, much as with the bread.
Strawberry powder for 3 weeks lowered plasma cholesterol in obese adults
In this double-blind crossover pilot trial, 20 healthy obese adults (BMI 30 to 40) ate a prepared diet. Each took strawberry powder, equal to four servings of frozen strawberries, and a strawberry-flavored control for 3 weeks. Small HDL particles fell and LDL particle size grew. A California Strawberry Commission grant and the USDA supported the work.
A drink with 10 g freeze-dried strawberries lowered triglycerides and oxidized LDL
In this single-blind crossover trial, 24 overweight men and women with high blood fats drank a strawberry or a placebo drink for 6 weeks each. Both were tested with high-fat meals. The abstract gives P values (tests of chance), not the size of the changes. It reports a difference between men and women for oxidized LDL.
Strawberry powder in fatty meals did not change triglycerides, glucose or insulin
This randomized crossover trial gave 30 overweight or obese adults a meal with 50 g of fat, with or without 40 g of strawberry powder. The freeze-dried powder equaled about a pound (0.45 kg) of fresh berries. Triglycerides, insulin and glucose rose after both meals, with no difference between them, and artery function did not change either. The California Strawberry Commission paid for the study and supplied the powders.
Freeze-dried strawberries with a fatty meal did not lower triglycerides
In this crossover study, 10 overweight or obese men ate 25 g of freeze-dried strawberries with a high-fat test meal. They were tested with and without a session of high-intensity cycling the day before. The exercise lowered triglycerides after the meal. The strawberries did not, and the rise in triglycerides was slightly larger with them.
A strawberry drink curbed insulin and inflammation rises after a high-carb meal
In this crossover trial, 24 overweight adults had the same high-carbohydrate meal with a strawberry drink or a placebo drink. Over 6 hours, the rise in CRP and IL-6 (inflammation markers) was clearly smaller, and so was the insulin response. The drink was made from freeze-dried strawberries, and a California Strawberry Commission grant funded the study.
Strawberry puree improved white bread’s blood sugar profile by 36%
These randomized crossover meal studies tested healthy women (13 to 20 per study). They ate white bread alone or with 150 g of berry puree, each meal with 50 g of available starch. Several berries lowered insulin, strawberries included, but only strawberries and a mixed-berry blend clearly improved the glycemic (blood sugar) profile. These were whole-berry meals measured for 2 hours.
32 g of strawberry powder daily lowered fasting insulin and insulin resistance
In this randomized crossover trial, 33 adults with obesity and high LDL took 13 g, 32 g or a control powder for 4 weeks each. Fasting insulin and HOMA-IR, a measure of insulin resistance, fell on the high dose compared with the low dose and control. Glucose and standard cholesterol readings did not differ. A California Strawberry Commission grant paid for the study, and the commission supplied the powders.
Strawberry drink lowered CRP in type 2 diabetes, not fasting blood sugar
In this randomized, double-blind trial, 36 people with type 2 diabetes took the freeze-dried strawberry drink or a strawberry-flavored placebo powder. From baseline to 6 weeks, CRP fell from 2.5 to 2.04 mg/L, and a marker of fat oxidation fell as well. Fasting blood sugar did not fall, and HbA1c (long-term blood sugar) showed a 5.7% decreasing trend. The dose, 50 g a day, equals about 500 g of fresh berries.
High-sugar strawberry jam raised blood sugar and insulin more than low-sugar jam
In this randomized crossover trial, 16 healthy adults ate 60 g of one of three strawberry jams. Glucose and insulin were higher 30 and 60 minutes after the high-sugar jam. Adding antioxidants to a low-sugar jam brought no extra benefit for blood sugar, blood fats or oxidative status.
Freeze-dried strawberry powder did not clearly lower blood pressure in postmenopausal women
This randomized trial gave 60 postmenopausal women with raised blood pressure 25 or 50 g of powder a day, or a control, for 8 weeks. Systolic pressure fell from 141 to 135 mm Hg in the 25 g group, but no group differed from control. So the authors call it premature to say the powder improves blood pressure. The California Strawberry Commission funded the study.
90 days of strawberry powder improved word recognition and navigation in seniors
This randomized trial gave 37 healthy people aged 60 to 75 (22 men, 15 women) 24 g of freeze-dried powder a day or a placebo. The dose equals about two cups of fresh berries. The strawberry group had shorter times in a virtual navigation task and better recognition on a verbal learning test, but not better walking or balance. The USDA and the California Strawberry Commission funded the study, and the commission supplied the powders.
Strawberry powder reduced memory interference and depressive symptoms in midlife
This controlled trial gave whole-fruit strawberry powder for 12 weeks to overweight middle-aged men and women with insulin resistance and self-reported cognitive decline. Memory interference and depressive symptoms improved, but blood sugar measures did not. The authors name the small sample, short length and low anthocyanin dose as possible reasons. The California Strawberry Commission funded the study and supplied the powders.
Freeze-dried strawberry drink reduced knee pain in obese adults with osteoarthritis
In this randomized, double-blind crossover trial, 17 adults with X-ray signs of knee osteoarthritis drank 50 g a day for 12 weeks. Pain scores and the inflammation markers IL-6, IL-1β and MMP-3 were lower than with the control drink. CRP, glucose and blood fats did not change. Pain came from questionnaires, and the California Strawberry Commission supplied the powders.
Strawberry powder lowered precancerous lesion grade in 29 of 36
This randomized phase II trial tested people with precancerous lesions of the esophagus (food pipe) in a high-risk area of China. The 75 people drank 30 g or 60 g a day in water for 6 months, and there was no placebo group. The 30 g dose changed nothing, and at 60 g the growth marker Ki-67 fell 37.9%. The California Strawberry Commission supported the work, and one author part-owns a freeze-dried berry company.
Eating the most strawberries raised gut bacteria that make short-chain fatty acids
In this randomized trial, 69 healthy older Germans were split into five groups for 10 weeks. They ate different amounts of fresh and freeze-dried strawberries and capers in olive oil. In the top strawberry group, gut bacterial diversity rose and the genera Faecalibacterium and Prevotella increased. It measured bacteria, not health, and a strawberry farm helped fund the larger study.
Women eating the most strawberries had slightly slower mental decline
This Nurses’ Health Study cohort (a study that follows a large group for years) tracked 16,010 women aged 70 or older. Their diet was recorded every 4 years from 1980. On a score averaging 6 memory and thinking tests, the gap between the highest and lowest strawberry intake was 0.03 (range 0.00 to 0.06). The authors compare the effect of blueberries and strawberries to 1.5 to 2.5 years of age.
Young women eating most anthocyanins had 32% lower heart attack risk
Nurses’ Health Study II followed 93,600 women aged 25 to 42 for 18 years, with 405 heart attacks. Eating blueberries and strawberries more than 3 times a week went with 0.66 times the risk, but that trend could be chance. Anthocyanins, the red and blue plant pigments, come from several foods, and a link is not proof of cause.
Top anthocyanin intake: 8% lower high blood pressure risk, not past 60
Three US cohorts of 87,242 women, 46,672 women and 23,043 men were followed for 14 years; most anthocyanins came from blueberries and strawberries. The drop was 12% in people aged 60 or younger. Above 60 the risk was 0.96 times, no clear link. It measured anthocyanins, not strawberries alone.
In mice on a high-fat diet, strawberries eased vascular inflammation
This study was in mice, not people. Mice ate a standard or high-fat diet with or without strawberries (about 2 human servings) for 12 weeks. Gut microbes turned strawberry compounds into metabolites such as hippuric acid. Killing off the microbes with antibiotics removed the vascular benefit.
Strawberry polyphenols slowed glucose uptake and transport in gut cell layers
This lab study used human Caco-2 intestinal cells, not people. Strawberry and apple extracts strongly cut glucose uptake and transport, more at the GLUT2 carrier than at SGLT1. Pelargonidin-3-O-glucoside explained about 26% of the strawberry effect. The study does not show a change in blood sugar after a real meal.
Strawberry extract slowed breast cancer cell growth in dishes and mice
This lab and animal study tested a polyphenol-rich Alba variety extract on a highly invasive breast cancer cell line, and fed it to mice. Cell viability fell with time and dose. The extract acted more strongly on breast cancer cells than on the other cell lines tested. It says nothing yet about eating strawberries.
Who should be careful with strawberries
Most people can eat strawberries freely. Take a little care if one of these applies:
- Pollen allergy. Strawberries contain Fra a 1, a protein that resembles the main birch pollen allergen. So some people with birch pollen allergy get an itchy mouth from raw berries. Cooking reduces the reaction in most cases. A severe reaction with throat swelling is rare but needs urgent care and an allergist.
- Recalled imported berries. Fresh and frozen organic strawberries from one grower in Baja California, Mexico, were linked to two hepatitis A outbreaks in 2022 and 2023. There were 39 cases and 21 hospitalizations in the US and Canada. Such outbreaks are rare. Check recalls, and if you ate a recalled lot in the last 14 days and are not vaccinated, call your doctor or health department.
How to choose, store and eat strawberries
- Fresh: 500 g a day for a month lowered LDL cholesterol by 13.7% in healthy volunteers, a lot of fruit for one trial.
- Freeze-dried powder: trials used 13 to 50 g a day, and one paper counts 50 g as about 500 g of fresh berries. More was not better: 13 g lowered total cholesterol by 2.8% and 40 g did not.
- Jam and puree: a high-sugar jam raised glucose and insulin more than low-sugar jams in 16 adults. But 150 g of puree with white bread improved the bread’s blood sugar profile by 36% in healthy women.
Buy berries that are fully red. Strawberries are a non-climacteric fruit, so they do not ripen much after picking. Keep them in a refrigerator at 40°F or below, and wash them under running water before eating.
Residues are no reason to skip strawberries. In USDA tests of 530 fresh samples in 2016, 3 had a residue above the legal limit (25 of 706 in 2015). USDA reports that the residues it finds are at levels EPA (the US Environmental Protection Agency) considers safe.
Sources
- Oral allergy syndrome (OAS) defined. American Academy of Allergy, Asthma & Immunology.
- Kurze E, Kock V, Lo Scalzo R, Olbricht K, Schwab W. Effect of the strawberry genotype, cultivation and processing on the Fra a 1 allergen content. Nutrients. 2018.
- Franz-Oberdorf K, Eberlein B, Edelmann K, et al. Fra a 1.02 is the most potent isoform of the Bet v 1-like allergen in strawberry fruit. J Agric Food Chem. 2016.
- McClure M, Kirchner M, Greenlee T, et al. Investigation of two outbreaks of hepatitis A virus infections linked to fresh and frozen strawberries imported from Mexico, 2022-2023. J Food Prot. 2025.
- Hepatitis A outbreak linked to frozen organic strawberries. CDC.
- Li BJ, Grierson D, Shi Y, Chen KS. Roles of abscisic acid in regulating ripening and quality of strawberry, a model non-climacteric fruit. Hortic Res. 2022.
- Selecting and serving produce safely. US Food and Drug Administration.
- Pesticide Data Program annual summary, calendar year 2016. USDA Agricultural Marketing Service.
- Pesticide Data Program annual summary, calendar year 2015. USDA Agricultural Marketing Service.
- Alvarez-Suarez JM, Giampieri F, Tulipani S, et al. One-month strawberry-rich anthocyanin supplementation ameliorates cardiovascular risk, oxidative stress markers and platelet activation in humans. J Nutr Biochem. 2014.
- Moazen S, Amani R, Homayouni Rad A, et al. Effects of freeze-dried strawberry supplementation on metabolic biomarkers of atherosclerosis in subjects with type 2 diabetes. Ann Nutr Metab. 2013.
- Richter CK, Skulas-Ray AC, Gaugler TL, et al. Randomized double-blind controlled trial of freeze-dried strawberry powder supplementation in adults with overweight or obesity and elevated cholesterol. J Am Nutr Assoc. 2023.
- Ibero-Baraibar I, Cuervo M, Navas-Carretero S, et al. Different postprandial acute response in healthy subjects to three strawberry jams varying in carbohydrate and antioxidant content. Eur J Nutr. 2014.
- Törrönen R, Kolehmainen M, Sarkkinen E, et al. Berries reduce postprandial insulin responses to wheat and rye breads in healthy women. J Nutr. 2013.
History of strawberries
People ate wild strawberries long before anyone farmed them. They appear in Roman writing and art: Ovid wrote that people of the Golden Age lived on wild fruits such as mountain strawberries. Medieval painters placed them in the Virgin Mary’s garden, as in the Madonna of the Strawberries (1420 to 1430). These were small wild berries, because the garden strawberry did not exist yet.
The big modern berry has an American story. The Virginia strawberry reached Europe from eastern North America, and in 1714 Amédée-François Frézier brought the Chilean strawberry back from Chile. In Brittany in the 1750s, gardeners found that the Chilean plants bore only female flowers. They planted wild European strawberries among them for pollen, and the plants fruited well.
In 1766, Antoine Nicolas Duchesne at Versailles worked out that the garden strawberry was a hybrid of the Chilean and Virginia species. Genetic work agrees. A 2021 study traced it to spontaneous hybrids in early 18th-century Europe, and a 2019 genome supported a North American origin.
Its Latin name, Fragaria × ananassa, nods to the pineapple, because early growers likened the flavor to it. Philip Miller recorded a “pine strawberry” in Chelsea, England, in 1759. In 1806, Michael Keens of Isleworth, England, selected Keens Imperial, which won the Royal Horticultural Society’s Silver Cup.
In the 1950s, perpetual-flowering hybrids that did not depend on day length gave higher yields and let California expand its production. Today the world grows about 10.7 million tonnes a year, according to 2024 FAOSTAT figures (the UN food agency’s database). China makes about 38%, and the US about 1.5 million tonnes.
Breeding has a cost too: the 2021 study found lower genetic diversity in modern cultivars after intense selection.
Sources
- Strawberry. Wikipedia.
- Hardigan MA, Lorant A, Pincot DDA, et al. Unraveling the complex hybrid ancestry and domestication history of cultivated strawberry. Mol Biol Evol. 2021.
- Edger PP, Poorten TJ, VanBuren R, et al. Origin and evolution of the octoploid strawberry genome. Nat Genet. 2019.
- Aaby K, Skrede G, Wrolstad RE. Phenolic composition and antioxidant activities in flesh and achenes of strawberries (Fragaria ananassa). J Agric Food Chem. 2005.
Frequently asked questions about strawberries
Are strawberries good for you?
For most people, yes: raw strawberries have 32 calories, 2 g of fiber and 58.8 mg of vitamin C per 100 g. A cup (152 g) gives 99% of the Daily Value (the FDA’s daily target) for vitamin C. In a meta-analysis of 11 randomized trials, the best-supported result was small: they lowered the inflammation marker CRP by 0.63 mg/L. The pooled results for cholesterol and blood pressure were mixed, and no strawberry finding here reaches strong evidence.
How many strawberries should you eat a day?
No study here sets a best amount. Trials used 13 to 50 g of freeze-dried powder a day, or 454 to 500 g of fresh berries. More powder was not better: 13 g lowered total cholesterol by 2.8% in a 40-person trial and 40 g did not. A cup (152 g) has 49 calories, far less than the whole-fruit trials used.
Are strawberries high in sugar?
No, they are low in sugar: 4.89 g of sugars per 100 g (7.43 g in a cup), with a glycemic index of 40. In healthy women, 150 g of puree with white bread improved the blood sugar profile of the bread by 36%. But a high-sugar strawberry jam raised glucose and insulin more than low-sugar jams in 16 adults. People with diabetes should check portions with their care team.
Do strawberries lower cholesterol?
Maybe a little, and the trials disagree. One meta-analysis of 11 trials found no overall change, only drops in people who started high (total cholesterol 0.52 mmol/L, LDL 0.31 mmol/L). Another, of 14 trials, found total cholesterol 6.5 mg/dL lower. Single trials split too: 50 g of powder a day cut LDL by 28 mg/dL in 60 adults but not in 34 others. Most used powder, and many were funded by the California Strawberry Commission.
Are strawberries good for your brain?
There are hints, not proof. In adults aged 60 to 75, 24 g of strawberry powder a day for 90 days improved word recognition and spatial navigation. In the Nurses’ Health Study, women who ate the most strawberries had slightly slower mental decline (a difference of 0.03, range 0.00 to 0.06). Both effects were small, and the trial was funded by the USDA and the California Strawberry Commission.
Are strawberries good for weight loss?
No study here tested weight loss. Raw strawberries have 32 calories and 2 g of fiber per 100 g, or 49 calories and 3 g of fiber in a cup. So they fill a bowl cheaply, which is a swap effect for higher-calorie sweets, not a proven effect of strawberries.
Why do strawberries make my mouth itch?
Most often it is pollen-food allergy, also called oral allergy syndrome. Strawberries contain Fra a 1, a protein that resembles the main birch pollen allergen. Reactions are usually limited to the mouth and throat. Cooking reduces the reaction in most cases, and throat swelling or trouble breathing needs urgent care.
Do strawberries have more vitamin C than oranges?
Yes, gram for gram. Raw strawberries have 58.8 mg of vitamin C per 100 g against 53.2 mg in raw oranges, in the USDA data we use. A cup of strawberries (152 g) has 89.4 mg, or 99% of the Daily Value.