Is kiwi fruit good for pregnancy?

It is a perfectly good fruit to eat while pregnant, and nobody has tested it as anything more. We found no randomized trial and no systematic review of kiwifruit in pregnant women. The nearest evidence is about constipation. In a Cochrane review, fiber supplements raised stool frequency in constipated pregnant women by 2.24 times a week, and that figure comes from one study of 40 women. Two green kiwifruit a day added about 1.5 complete bowel movements a week in adults with functional constipation, and none of those adults was pregnant.

Unsettled. The case for kiwi in pregnancy is built from pieces that were each tested on someone else. Fiber was tested in pregnant women, kiwifruit was tested in people who were not pregnant, and the two have never met in one trial. It is a reasonable bet for constipation. It is not a measured one.

Extra bowel movements a week

The two rows answer different questions. The first is fiber supplements in pregnancy, against no treatment, from a Cochrane review. The second is kiwifruit in adults who were not pregnant, and only the mean is given, so no interval is drawn. Nobody has tested kiwifruit for constipation in pregnancy. Sources: cards ev-kwpg-01 and ev-kwpg-02 below.

What the trials found

Constipation: the one place kiwi has a plausible job

The 2015 Cochrane review is the only pooled look at diet for constipation in pregnancy that we found. Fiber supplements beat no intervention by 2.24 stools a week, with a confidence interval from 0.96 to 3.52, on moderate quality evidence. The supplement was fiber, not fruit. Separately, a crossover trial in three countries gave 2 green kiwifruit a day for 4 weeks to adults with functional constipation or constipation-predominant irritable bowel syndrome. Complete bowel movements rose by 1.53 a week in the functional constipation group and 1.73 in the IBS group. The trial was funded by Zespri, a kiwifruit marketer, and it did not include pregnant women.

Vitamin C: plenty in kiwi, no pregnancy benefit from pills

NIH lists kiwifruit among the good food sources of vitamin C. That is often turned into an argument for kiwi in pregnancy. A 2025 meta-analysis of 17 randomized trials in 21,567 pregnant women tested vitamin C supplements, alone or with vitamin E, against placebo. Preterm birth did not differ (RR 1.04, 95% CI 0.96 to 1.14). Those were supplements at doses above food, so the result says nothing against the fruit. It does mean extra vitamin C has no shown pregnancy benefit to point to.

Myth. Kiwi is sometimes sold as a way to protect a pregnancy through its vitamin C. When vitamin C was tested in pregnant women as a pill, across 17 trials, it did not change the rate of preterm birth.

Gestational diabetes: fruit in general, no link either way

Observational data from a 2020 meta-analysis of 5 cohort studies found no link between eating fruit during pregnancy and gestational diabetes (RR 1.18, 95% CI 0.48 to 2.91). That interval is wide enough to fit a sizeable benefit or a sizeable harm, and the studies disagreed strongly with one another. Kiwi was not analyzed on its own.

Iron: a result in women who were not pregnant

In a randomized trial in healthy women aged 18 to 44 with low iron stores, none of them pregnant, eating 2 gold kiwifruit with an iron-fortified breakfast cereal for 16 weeks raised serum ferritin by a median 10 mcg/l in the 33 women analyzed in the kiwifruit group. In the 36 women given banana with the same cereal it rose by 1 mcg/l. Whether this helps pregnant women has not been tested.

Who should be careful

Not for everyone. People allergic to kiwi. In double-blind food challenges of patients sensitized to kiwi, 46 percent of the patients had symptoms beyond the mouth, and the share was higher in people with no pollen allergy. Pregnancy does not make kiwi safer for someone who reacts to it. Cooking is not a reliable fix either. In 20 children allergic to fresh kiwifruit, one reacted to kiwifruit steamed for five minutes, in a small study from 2004.

Avoiding kiwi to protect the baby from allergy has no support. A Cochrane review of 5 trials in 952 high-risk pregnant women found that avoiding allergenic foods in pregnancy did not protect children from atopic eczema in their first 18 months. A 2018 systematic review of diet in pregnancy and infancy also found no sign that fruit intake or avoiding allergenic foods changed a child's risk of allergic disease, with the fruit part resting on observational studies. Kiwi itself was not studied in either.

The one food safety point is ordinary. CDC lists washed fruits and vegetables as the safer choice for pregnant women, with washed and then cooked as safest. That applies to kiwi as to any other fruit.

What expert bodies say

The American Gastroenterological Association's 2024 practice update lists dietary fiber among the treatment options for constipation in pregnancy, alongside lactulose and polyethylene glycol laxatives. It does not name kiwifruit and gives no formal evidence rating. NIH lists kiwifruit as a good source of vitamin C without saying anything specific about pregnancy. CDC advises pregnant women to choose washed fruit. We found no expert body that recommends or warns against kiwi in pregnancy as such.

How we searched

Searched: a local copy of PubMed, queried on 7 October 2026 for kiwi, kiwifruit or Actinidia with pregnancy, gestation, maternal diet, lactation and gestational diabetes. That search returned 2 records, a case report and a study of wheeze in children, and neither was about kiwi in pregnancy. We then searched around the question: fiber and diet for constipation in pregnancy, vitamin C supplements in pregnancy, fruit intake and gestational diabetes, maternal allergen avoidance, kiwi allergy, and kiwifruit with iron, folate and vitamin C. We also searched a local index of ClinicalTrials.gov (no kiwifruit pregnancy trials), the NIH vitamin C fact sheet, the CDC page on food for pregnant women, and the open web. Every included study was checked against Retraction Watch.

Included: 11 sources. Two Cochrane reviews, two meta-analyses, one systematic review, two randomized trials outside pregnancy, one double-blind food challenge study, one practice update and two agency pages. One existing card on cooked kiwifruit and allergy in children is reused from the kiwi page.

Excluded: a meta-analysis of vitamin C in pregnant smokers, as too far from a food question. A trial of soluble fiber supplements in pregnant women whose abstract gives no effect size. A trial of a fig and walnut syrup, which is a different food. Folic acid trials, because they test supplements and say nothing about the fruit. Consumer health sites.

What we read: abstracts for most sources, each quotation checked against the abstract text. The kiwifruit constipation trial was read in full text. The CDC and NIH pages were read at the section level.

What we could not get: NHS pages on washing fruit and toxoplasma, which are not on our list of trusted sources. The NIH vitamin C fact sheet had no passage on pregnancy we could quote.

What would change this answer

A randomized trial of kiwifruit for constipation in pregnant women. The fruit works outside pregnancy, fiber works inside it, and one trial would join the two.
A trial of kiwifruit eaten with iron-rich meals in pregnant women with low iron stores, with anemia or ferritin as the outcome. The only result we have comes from women who were not pregnant.
A cohort that reports kiwi, or vitamin C rich fruit, separately for gestational diabetes or birth outcomes. Every observational result we found lumps all fruit together.

More on the fruit itself is on the kiwi fruit page.

The food behind this question

Kiwifruit: the fruit moved the bowel, the capsule did not — numbers, evidence and safety

The same question for other foods (pregnancy)

Sources

ev-kwpg-01 · Meta-analysis or systematic review · Cochrane systematic review of RCTs and quasi-RCTs · n = 40
Pregnant women who received fibre supplementation had significantly higher frequency of stools compared to no intervention (mean difference (MD) 2.24 times per week, 95% CI 0.96 to 3.52; 40 women, one study, moderate quality of evidence).
Who: pregnant women with constipation; fiber supplementation versus no intervention
Effect: stool frequency MD +2.24 per week (95% CI 0.96 to 3.52); moderate quality evidence; no meta-analysis possible
Certainty: Fiber supplement, not kiwi; nobody has tested kiwi in pregnant women. Only 2 of 4 studies gave data.
Cochrane Database Syst Rev, 2015 · checked 2026-10-07 · we read the abstract
ev-kwpg-02 · Randomized controlled trial(s) · international multicenter randomized AB/BA crossover trial, kiwifruit vs psyllium 7.5 g/day, 4 weeks each · n = 184
The primary outcome of an increase of ≥ 1.5 CSBM per week was achieved in the FC (mean 1.53, P < 0.0001), IBS-C (mean 1.73, P = 0.0003), and combined FC + IBS-C (mean 1.69, P < 0.0001) groups after the kiwifruit intervention.
Who: healthy controls (n = 63), patients with functional constipation (FC, n = 60), and patients with constipation-predominant irritable bowel syndrome (IBS-C, n = 61)
Effect: CSBM per week +1.53 (FC), +1.73 (IBS-C), +1.69 combined; kiwifruit greater than psyllium in combined group (P = 0.038)
Certainty: Non-pregnant; Zespri funding. Tolerability in pregnancy is an assumption.
Am J Gastroenterol, 2023, Consumption of 2 Green Kiwifruits Daily Improves Constipation and Abdominal Comfort · checked 2026-10-07 · we read the fulltext
ev-kwpg-03 · Position of an expert body · expert review clinical practice update, no formal systematic review · n = —
Constipation in pregnant persons may result from hormonal, medication-related, and physiological changes. Treatment options include dietary fiber, lactulose, and polyethylene glycol-based laxatives.
Who: pregnant patients with constipation
Effect: dietary fiber named as a treatment option; no formal evidence rating
Certainty: Position without its own analysis; kiwi is not mentioned directly.
Gastroenterology, 2024 · checked 2026-10-07 · we read the abstract
ev-kwpg-04 · Meta-analysis or systematic review · systematic review and random-effects meta-analysis of RCTs · n = 21567
Vitamin C supplementation showed no significant difference compared to placebo for preterm birth (RR 1.04; 95% CI 0.96, 1.14).
Who: pregnant women in RCTs of vitamin C alone or with vitamin E versus placebo
Effect: preterm birth RR 1.04 (95% CI 0.96 to 1.14), vitamin C supplementation vs placebo
Certainty: High-dose supplements, not food; vitamin C from kiwi has no established "pregnancy" benefit beyond the norm.
Rev Bras Ginecol Obstet, 2025 · checked 2026-10-07 · we read the abstract
ev-kwpg-05 · Observational data · systematic review and meta-analysis of cohort studies · n = 5 cohort studies
No link was obtained between fruit consumption during the pregnancy and GDM onset (1.18, 95 % CI: 0.48, 2.91; I2:94.6 %, p = 0.0001).
Who: women in 5 cohort studies, highest vs lowest fruit intake
Effect: fruit during pregnancy and GDM RR 1.18 (95% CI 0.48 to 2.91), I2 94.6%
Certainty: Fruit overall, not kiwi; large heterogeneity.
Complement Ther Med, 2020 · checked 2026-10-07 · we read the abstract
ev-kwpg-06 · Randomized controlled trial(s) · randomized controlled trial, 16 weeks, 16 mg iron as ferrous sulfate in fortified cereal · n = 69 analyzed (33 kiwifruit, 36 banana)
Median serum ferritin increased significantly in the kiwifruit group (n 33) compared with the banana group (n 36), with 10·0 (25th, 75th percentiles 3·0, 17·5) v. 1·0 (25th, 75th percentiles - 2·8, 6·5) μg/l (P < 0·001).
Who: healthy women aged 18-44 years with low iron stores (serum ferritin 25 mcg/l or less), not pregnant
Effect: median ferritin +10.0 mcg/l (kiwifruit) vs +1.0 mcg/l (banana), P < 0.001
Certainty: Non-pregnant; the mechanism (vitamin C enhances absorption of non-heme iron) transfers, clinical benefit in pregnant women not tested.
Br J Nutr, 2011 · checked 2026-10-07 · we read the abstract
ev-kwpg-07 · Observational data · double-blind placebo-controlled food challenge study (non-randomized) · n = —
Forty-six percent of patients experienced systemic symptoms, and this happened with higher frequency in patients not allergic to pollen (100%).
Who: patients with allergy symptoms sensitized to kiwi, birch-free area
Effect: systemic symptoms in 46% of patients; 100% in patients not allergic to pollen
Certainty: Not about pregnant women; pregnancy does not make kiwi safer for allergic people. Cross-reaction with latex.
J Allergy Clin Immunol, 2004 · checked 2026-10-07 · we read the abstract
ev-kwpg-08 · Meta-analysis or systematic review · Cochrane systematic review of randomized or quasi-randomized trials · n = 952
The evidence from five trials, involving 952 participants, does not suggest a protective effect of maternal dietary antigen avoidance during pregnancy on the incidence of atopic eczema during the first 18 months of life.
Who: high-risk pregnant women prescribed a dietary antigen avoidance diet
Effect: no protective effect on atopic eczema to 18 months
Certainty: An argument against excluding kiwi "to prevent allergy in the child"; kiwi was not studied separately.
Cochrane Database Syst Rev, 2012 · checked 2026-10-07 · we read the abstract
ev-kwpg-09 · Observational data · systematic review and meta-analysis with GRADE (trials and observational studies) · n = —
We did not find that other dietary exposures-including prebiotic supplements, maternal allergenic food avoidance, and vitamin, mineral, fruit, and vegetable intake-influence risk of allergic or autoimmune disease.
Who: studies of maternal or infant diet and allergic or autoimmune disease
Effect: no influence found for fruit, vegetable, vitamin intake or maternal allergenic food avoidance
Certainty: The fruit part rests on observational data; "did not find" does not mean "absence demonstrated".
PLoS Med, 2018 · checked 2026-10-07 · we read the abstract
ev-kwpg-10 · Position of an expert body · government fact sheet · n = —
Other good food sources include red and green peppers, kiwifruit, broccoli, strawberries, Brussels sprouts, and cantaloupe [8,13].
Who: general population
Effect: kiwifruit listed with peppers, broccoli, strawberries, Brussels sprouts and cantaloupe
Certainty: Composition context; pregnancy is not addressed separately.
NIH Office of Dietary Supplements, Vitamin C Fact Sheet for Health Professionals · checked 2026-10-07 · we read the section
ev-kwpg-11 · Position of an expert body · agency consumer guidance · n = —
Washed vegetables and fruits (washed and then cooked are safest)
Who: pregnant women
Effect: unwashed fresh produce listed as riskier; washed produce as safer
Certainty: Concerns any fruit, including kiwi (the skin in soil and dust).
CDC, Safer Food Choices for Pregnant Women · checked 2026-10-07 · we read the section
kwi-r2-07 · Randomized controlled trial(s) · prospective trial with double-blind placebo-controlled food challenges to steam-cooked kiwifruit (212 °F / 100 °C for 5 minutes) and to an industrially homogenized preparation, with skin prick tests to commercial allergen and raw fruit, a confirmatory challenge with 0.88 oz (25 g) of fresh kiwifruit, and specific IgE identified by immunoblotting · n = 20
There was no clinical reactivity following challenge with homogenised kiwifruit but one child reacted to cooked kiwifruit challenge.
Who: 20 children with a history of immediate allergic reactions to fresh kiwifruit, median age 9.4 years
Effect: fresh kiwifruit gave positive skin prick wheals in all 20 and reactions on challenge in 19; the commercial skin prick test was positive in five and steam-cooked kiwifruit in five, the homogenized preparation in none; no child reacted clinically to the homogenized preparation, one reacted to the cooked challenge; major allergens identified were Act c 1 and Act c 2
Certainty: twenty children in 2004, and the homogenized product was one specific industrial preparation rather than a category. The distinction is the useful part and it cuts against the common shorthand that cooking destroys food allergens: five minutes of steam left enough allergen for one child to react, while industrial processing did not. Nobody should test this at home on the strength of twenty children
Pediatr Allergy Immunol, 2004 · checked 2026-09-22 · we read the abstract

How this page was made. Evidence was extracted from primary sources into cards, every number was re-checked against the source, and the text was written from those cards. Bioma Learn has no human medical reviewer at this time, and we say so rather than invent one. Methodology. This is information, not medical advice.