Okra and blood sugar: what was tested was mostly capsules

Okra has a reputation for blood sugar, and there are five pooled analyses behind it, which is more than most vegetables ever get. Read the small print before you buy a bag of pods. Nearly every trial in those analyses gave people dried okra powder or extract in capsules, anywhere from 125 mg to 40 g a day, for 2 to 12 weeks. The largest, 14 trials with 836 participants, found fasting blood sugar fell by 23.7 mg/dL and HbA1c by 0.30 points, and its own authors rated the certainty of that evidence very low for most outcomes. The analyses also disagree with each other on HbA1c, the longer-run measure of blood sugar that matters more than one fasting reading. The first, from 2023, saw no change at all. The later ones saw a drop of 0.30 to 0.42 points. Until a large trial settles that, the blood sugar claim stays open. Okra eaten as food has been tested in exactly two small Japanese trials, 11 people each, and in both it was 40 g of okra inside a sticky breakfast with natto and yam on top of rice, so the vegetable never stood on its own. Safety is thin too. One trial of 100 people on metformin and gliclazide found no liver, kidney or blood pressure side effects from 3 g of okra powder a day, and nobody has looked at pregnancy, children or any other medicine.

The numbers, per 100 g

How much is actually in it

• Boiling okra roughly halves its folate, 88 to 46 ug per 100 g, and takes vitamin C from 21 to 16 mg. Stir-frying keeps folate at 83 ug but raises energy from 31 to 269 kcal through absorbed oil, and one cup of cooked okra weighs 160 g. — CoFID 2021 rows 13-300 Okra raw, 13-652 Okra boiled in unsalted water, 13-302 Okra stir-fried in corn oil; USDA Retention Factors R6 code 3005 greens boiled; FNDDS 2021-2023 portions; USDA SR Legacy Okra raw FDC 169260 (n = three CoFID rows) Evidence E source
  Per 100 g raw / boiled / stir-fried: folate 88 / 46 / 83 ug, vitamin C 21 / 16 / 21 mg, calcium 160 / 93 / 220 mg, magnesium 71 / 42 / 110 mg, potassium 330 / 213 / 480 mg, fat 1.0 / 0.2 / 26.1 g, energy 31 / 16 / 269 kcal; USDA R6 greens boiled in covering water and drained retains vitamin C 55% and folate 60%; FNDDS 1 cup cooked okra 160 g, 1 pod 10 g; USDA okra raw vitamin K 31.3 ug per 100 g

What a real portion looks like

• In 11 healthy adults, a rice breakfast served with 40 g of okra, 60 g of Japanese yam and 50 g of natto cut the glucose peak from 6.8 to 6.0 mmol/L. The 2 hour glucose and insulin areas fell 28 and 27 percent against a matched meal of non-viscous vegetables. — 11 healthy adults, randomised crossover, 200 g boiled white rice with viscous foods (50 g natto, 60 g yam, 40 g okra) versus rice with boiled soybeans, potatoes and broccoli, matched for macronutrients and fibre (n = 11) Evidence B source
  Peak glucose 6.0 vs 6.8 mmol/L; peak insulin 262 vs 360 pmol/L; 0 to 120 min iAUC glucose -28% and insulin -27%

What it does to your health

• Across 12 trials with 770 participants taking 125 mg to 40 g of okra a day for 2 to 12 weeks, okra lowered fasting glucose, HbA1c, LDL cholesterol and body weight by small to large standardised amounts. — 770 adults in 12 randomised trials, 2 to 12 weeks, okra doses 125 to 40000 mg/d, searched to January 2025 (n = 770) Evidence A source
  SMD fasting glucose -1.07 (95% CI -1.75 to -0.38); HbA1c -0.38 (-0.71 to -0.05); LDL-C -0.32 (-0.52 to -0.11); weight -0.77 (-1.42 to -0.11); BMI -0.70
• Pooling 10 trials in prediabetes, type 2 diabetes and diabetic nephropathy, okra supplementation lowered total cholesterol by 14 mg/dL, LDL by 8.5 mg/dL, triglycerides by 15 mg/dL and diastolic pressure by about 1 mm Hg, with no effect on systolic pressure or HDL. — patients with prediabetes, type 2 diabetes or diabetic nephropathy in 10 studies, searched to February 2026 (n = 10 studies) Evidence A source
  TC -14.16 mg/dL (95% CI -22.39 to -5.92); LDL-C -8.51 (-14.92 to -2.11); TG -15.43 (-28.67 to -2.19); DBP -1.17 mmHg (-2.28 to -0.06); CRP -2.28 mg/dL; SBP and HDL-C ns
• In 34 hyperlipidaemic adults, a portfolio diet that drew 10 g of viscous fibre per 1000 kcal from oats, barley, psyllium, okra and eggplant lowered LDL cholesterol by 29.6 percent in 4 weeks. Lovastatin 20 mg gave 33.3 percent and the control diet 8.5 percent. — 34 hyperlipidaemic adults, three 1-month treatments in random order: low saturated fat control, control plus 20 mg lovastatin, portfolio diet (n = 34) Evidence B source
  LDL-C -8.5% control, -33.3% statin, -29.6% portfolio at 4 weeks; statin vs portfolio P = 0.013; 26% of participants reached their lowest LDL on the portfolio

Safety, limits and interactions

• In 100 people with type 2 diabetes on metformin and gliclazide, 1000 mg of powdered okra fruit three times a day for 3 months lowered fasting glucose, HbA1c, total cholesterol, triglycerides and hs-CRP against placebo, with no liver, kidney or blood pressure side effects. — 100 patients with type 2 diabetes aged 40 to 60, double-blind, placebo, 3 g/d okra pod powder for 3 months on top of standard therapy, Iran (IRCT20120112008712N2) (n = 100) Evidence B source
  Significant decreases in FBG, HbA1c, total cholesterol, triglycerides and hs-CRP versus placebo; effect sizes not given in the abstract; no adverse effects observed
• Two okra pickers and packers developed IgE-mediated allergy to okra, and 8 of 14 fellow farmers handling okra had positive skin reactions to okra extract, tied to work-related symptoms. — two workers with work-related allergic symptoms and 14 farmers picking and packing okra, Japan (n = 16) Evidence D source
  Positive intradermal, Prausnitz-Kustner and nasal provocation tests in both cases; 8 of 14 farmers (57%) intradermal positive
• A systematic review of food allergy in 11 African countries lists okra in Nigeria among regionally significant or novel food allergens, alongside pineapple in Ghana and mopane worm in Botswana. — published food allergy studies from 11 African countries, mostly sensitisation or self-reported symptoms (n = 11 countries) Evidence C source
  Okra named as a regional allergen in Nigeria; most studies lack stringent diagnosis
• In 242 raw vegetable samples from Asian vendors at six northern California farmers markets, all carried faecal coliforms and 20 percent carried E. coli, while okra, yardlong beans and bitter squash had lower coliform levels than basil, cilantro and squash leaves. — 242 samples of six raw vegetables from 21 vendors at six farmers markets, northern California, summer 2013 (n = 242) Evidence C source
  100% faecal coliforms, 20% E. coli, 6.6% Salmonella (mostly cilantro and squash stems and leaves); okra among the lower-coliform commodities; no E. coli O157:H7

What people believe that the data does not support

• In the first meta-analysis of 8 studies with 331 people with prediabetes or type 2 diabetes, okra lowered fasting glucose by 14.6 mg/dL against placebo but left HbA1c unchanged, so a lasting effect on blood sugar was not shown. — 331 patients with prediabetes or type 2 diabetes in 8 studies, MEDLINE and Scopus (n = 331) Evidence A source
  FBG MD -14.63 mg/dL (95% CI -25.25 to -4.00, I2 33%); HbA1c MD 0.01% (95% CI -0.51 to 0.54, ns)
• The largest pooled analysis to date, 14 randomised trials with 836 participants published 2020 to 2025, found okra supplements lowered fasting blood sugar by 23.7 mg/dL and HbA1c by 0.30 points, with the certainty of evidence rated very low for most outcomes. — 836 participants across the diabetes spectrum in 14 randomised controlled trials published 2020 to 2025 (n = 836) Evidence A source
  Fasting blood sugar WMD -23.66 mg/dL (95% CI -34.20 to -13.12); 2 h postprandial glucose WMD -22.39 mg/dL; HbA1c WMD -0.30% (95% CI -0.59 to -0.02)

Who this works differently for

• In 64 patients with diabetic nephropathy, a 125 mg capsule of dried okra extract daily for 10 weeks did not improve kidney function, glycaemic control or inflammation compared with placebo. — 64 patients with diabetic nephropathy, triple-blind, 125 mg dried okra extract or placebo for 10 weeks (n = 64) Evidence B source
  Within-group falls in FBG, HbA1c and insulin resistance, but no between-group difference; urine protein, urine creatinine and hs-CRP unchanged
• In the same 64 diabetic nephropathy patients, 125 mg of dried okra extract daily for 10 weeks left lipid profile, proteinuria, eGFR and RAGE-related inflammatory gene expression unchanged versus placebo. — 64 patients with diabetic nephropathy, triple-blind, 125 mg dried okra extract or placebo for 10 weeks with nutritional recommendations (n = 64) Evidence B source
  No significant between-group differences in lipid profile, kidney function indices, sRAGE or RAGE, ICAM-1 and IL-1 expression after 10 weeks
• In 11 overweight adults with impaired glucose tolerance, eating the natto, yam and okra breakfast daily for 2 weeks improved the composite insulin sensitivity index and lowered total and LDL cholesterol, while the matched control breakfast changed nothing. — 11 free-living overweight adults with impaired glucose tolerance, randomised crossover, 2 weeks per breakfast (n = 11) Evidence B source
  Acute glucose and insulin responses lower; CISI improved versus baseline after the test period only; total and LDL cholesterol decreased significantly; no change in chronic glycaemic markers

What is still unknown

• In 6 randomised trials in type 2 diabetes, okra supplements lowered fasting glucose by 21.7 mg/dL and HbA1c by 0.42 points, but did not change insulin, insulin resistance, BMI or body weight. — people with type 2 diabetes in 6 randomised controlled trials, searched to July 2024 (n = 6 trials) Evidence A source
  FBG WMD -21.72 mg/dL (95% CI -36.86 to -6.58); HbA1c WMD -0.42% (-0.64 to -0.19); insulin, HOMA-IR, BMI and weight not significant

The bottom line

If you like okra, eat it. The plain kitchen facts come first. Boiling roughly halves its folate (a B vitamin), 88 to 46 micrograms per 100 g, and takes vitamin C from 21 to 16 mg. Stir-frying keeps folate at 83 micrograms and turns a 31 kcal vegetable into a 269 kcal one through the oil it soaks up. A cup of cooked okra weighs 160 g, one pod about 10 g. Raw okra carries 31.3 micrograms of vitamin K per 100 g, and the USDA retention table has no entry for vitamin K, so what boiling does to that number is unknown. The slime people complain about is the sticky, gel-forming fibre, and viscosity is what those two food trials were built to test. In 11 healthy adults, 40 g of okra with yam and natto on rice brought the glucose peak from 6.8 to 6.0 mmol/L. In 11 overweight adults with impaired glucose tolerance, two weeks of that breakfast lowered total and LDL cholesterol while the matched breakfast changed nothing. In the older portfolio diet trial, 10 g of that kind of fibre per 1000 kcal drawn from oats, barley, psyllium, okra and eggplant cut LDL by 29.6 percent in 4 weeks, close to the 33.3 percent from 20 mg of lovastatin. In each of these okra was one ingredient among several, so how much of the credit belongs to okra is unknown. The capsule story is more mixed than the headline. Pooling 10 trials in people with prediabetes, diabetes or diabetic kidney disease, okra supplements lowered total cholesterol by 14 mg/dL, LDL by 8.5, triglycerides by 15 and diastolic pressure (the lower blood pressure number) by about 1 mm Hg, with systolic pressure and HDL untouched. In 6 trials in type 2 diabetes, insulin, insulin resistance, BMI and body weight did not move. And in 64 people with diabetic nephropathy, a 125 mg capsule of dried extract for 10 weeks did nothing that placebo did not: kidney function, blood sugar, lipids and inflammation all ended level between the groups. If you have diabetes, treat okra as a vegetable. The one trial that ran it alongside metformin and gliclazide added it on top of those drugs, and no trial has tried it in their place. Nobody has published a safe upper amount for okra powder or extract either. The one safety observation we hold is that same trial, 3 g a day for three months in 100 people, while the doses pooled in those analyses run up to 40 g a day, and at that end nothing about harm has been measured. Three things nobody has tested at all: okra water, raw okra on its own, and how much of anything in okra the body actually absorbs. Okra can be an allergen. Two okra pickers developed a true immune (IgE) allergy to it, 8 of 14 fellow farmers reacted to okra extract on skin testing, and a review of food allergy across 11 African countries lists okra as a regional allergen in Nigeria. Whether that reaches people who only eat it, these cards cannot say. In a survey of 242 raw vegetables from Asian vendors at California farmers markets, every sample carried faecal coliforms and 20 percent carried E. coli, with okra among the cleaner commodities. That survey did not test whether washing or cooking removed any of it. Our cards say nothing about okra in pregnancy, for children, or alongside any medicine other than the two diabetes drugs in that one trial. That silence is a gap in the research rather than a clean bill.

Sources

1. okr-c5-15 · reference dataset
   CoFID 13-300 Okra, raw: Energy 31 kcal · Fat 1.0 g · Calcium 160 mg · Magnesium 71 mg · Potassium 330 mg · Folate 88 ug · Vitamin C 21 mg || CoFID 13-652 Okra, boiled in unsalted water: Energy 16 kcal · Fat 0.2 g · Calcium 93 mg · Magnesium 42 mg · Potassium 213 mg · Folate 46 ug · Vitamin C 16 mg · AOAC fibre 3.1 g || CoFID 13-302 Okra, stir-fried in corn oil: Energy 269 kcal · Fat 26.1 g · Calcium 220 mg · Magnesium 110 mg · Potassium 480 mg · Folate 83 ug · Vitamin C 21 mg || USDA-RETN-R6:3005 VEG,GREENS,BOILED,WATER COVER DRAIN: vitamin_c_mg 55% · folate_total_ug 60% · thiamin_mg 80% · potassium_mg 85% · calcium_mg 95% || FNDDS 2709944 Okra, fresh, cooked, no added fat: 1 cup 160 g · 1 pod 10 g || USDA FDC 169260 Okra, raw: vitamin K 31.3 ug
   CoFID 2021, Public Health England / OGL v3.0; USDA Table of Nutrient Retention Factors R6 (2007); FNDDS 2021-2023; USDA FoodData Central SR Legacy · checked 2026-09-23
2. okr-c5-09 · randomised crossover trial
   The test meal, comprising 200 g of boiled white rice with viscous meal (50 g natto, 60 g Japanese yams and 40 g okras), and the control meal, comprising 200 g of white rice with non-viscous boiled soybeans, potatoes and broccoli, contained comparable amounts of carbohydrate, fat, protein and fiber. ... Peak glucose and insulin concentrations after the test meal (6.0 mmol/L and 262 pmol/L) were significantly lower than after the control meal (6.8 mmol/L and 360 pmol/L). The incremental areas under the curve for glucose and insulin over 0-120 min after the test meal were also significantly reduced as compared with the control meal (28 and 27%).
   Asia Pac J Clin Nutr, 2008 · checked 2026-09-23
3. okr-c5-01 · meta-analysis of RCTs
   Twelve trials involving 770 participants with interventions ranging from 2 to 12 weeks and doses varying from 125 to 40 000 mg/d were included. ... fasting plasma glucose (SMD = -1·07; 95 % CI -1·75, -0·38; P = 0·002), HbA1c (SMD = -0·38; 95 % CI -0·71, -0·05; P = 0·023)
   Br J Nutr, 2025 · checked 2026-09-23
4. okr-c5-03 · meta-analysis of trials
   Ten studies were included. Okra supplementation significantly reduced total cholesterol (14.16 mg/dL, 95% CI: -22.39, -5.92, P < 0.001), LDL-C (-8.51 mg/dL, 95% CI: -14.92, -2.11, P = 0.009), triglycerides (-15.43 mg/dL, 95% CI: -28.67, -2.19, P = 0.022), diastolic blood pressure (-1.17 mmHg; 95% CI: -2.28 to -0.06), and CRP (-2.28 mg/dL; 95% CI: -2.70 to -1.86). No significant effects were observed for systolic blood pressure or HDL-C overall.
   Nutr Diabetes, 2026 · checked 2026-09-23
5. okr-c5-11 · randomised crossover trial
   and viscous fibers from oats, barley, psyllium, and the vegetables okra and eggplant (10 g/1000 kcal) (portfolio diets). ... LDL-cholesterol concentrations decreased by 8.5+/-1.9%, 33.3+/-1.9%, and 29.6+/-1.3% after 4 wk of the control, statin, and portfolio diets, respectively.
   Am J Clin Nutr, 2005 · checked 2026-09-23
6. okr-c5-06 · randomised controlled trial
   The first group was administered 1000 mg of powdered okra fruit three times a day for 3 months, while the other group received a placebo capsule with the same dosage. ... No liver, kidney, and blood pressure or other side effects were observed in the groups associated with okra treatment.
   Acta Diabetol, 2023 · checked 2026-09-23
7. okr-c5-12 · case report
   To confirm the etiology of the two cases 14 farmers engaged in picking and packing okra were examined. Among them, 8 subjects (57%) showed positive intradermal reactions to okra extracts. ... These results confirm that the okra may be capable of inducing IgE-mediated immediate-type allergy to workers handling okra.
   Environ Res, 1993 · checked 2026-09-23
8. okr-c5-13 · systematic review
   Apart from the foods that commonly cause allergy in westernized countries, other regionally significant or novel food allergens may include pineapple (Ghana), okra (Nigeria), and mopane worm (Botswana).
   Clin Rev Allergy Immunol, 2014 · checked 2026-09-23
9. okr-c5-14 · cross-sectional survey
   Based on 242 samples from six commodities (basil, yardlong beans, bitter squash, okra, squash stems and leaves, cilantro), 100% of samples had detectable FCs and 20% had detectable E. coli. ... Yardlong beans, bitter squash, and okra had lower levels of FCs compared with basil, cilantro, and squash stems and leaves.
   J Food Prot, 2015 · checked 2026-09-23
10. okr-c5-04 · meta-analysis of trials
    Eight studies, including 331 patients with pre-diabetes or T2D, were eligible. Results: Our findings showed that okra treatment reduced the levels of fasting blood glucose: mean difference (MD) = -14.63 mg/dL; 95% CI (-25.25, -4.00, p = 0.007); I 2 = 33%, p = 0.17 compared to placebo. Glycated haemoglobin, however, did not differ significantly between the groups: MD = 0.01%; 95%CI (-0.51, 0.54, p = 0.96); I 2 = 23%, p = 0.28.
    Front Pharmacol, 2023 · checked 2026-09-23
11. okr-c5-05 · meta-analysis of RCTs
    Fourteen randomized controlled trials published between 2020 and 2025, including a total of 836 participants, were analysed. ... fasting blood sugar (WMD = −23.66 mg/dL, 95% CI: −34.20 to −13.12; P < 0.001) ... The certainty of evidence was very low for most outcomes, except for diastolic blood pressure and glycosylated haemoglobin, which were rated as low.
    Exp Physiol, 2026 · checked 2026-09-23
12. okr-c5-07 · randomised controlled trial
    Participants were randomly allocated to receive a 125-mg capsule of dried okra extract (DOE) (n 32) or placebo (n 32) for 10 weeks. ... Statistical analysis showed that fasting blood glucose, HbA1c and insulin resistance significantly reduced in the DOE group although between-group analysis did not show any significant difference.
    Br J Nutr, 2024 · checked 2026-09-23
13. okr-c5-08 · randomised controlled trial
    After adjustment for the potential confounders, between-group analyses showed no significant differences in terms of lipid profile, kidney function indices, sRAGE, and RAGE-related inflammatory genes expression after 10 weeks.
    Complement Ther Med, 2024 · checked 2026-09-23
14. okr-c5-10 · randomised crossover trial
    The test meal included boiled WR with natto (viscous fermented soyabeans), Japanese yam and okra. ... The test meal resulted in improvements in CISI compared to the baseline, whereas no significant changes were observed after the control meal period. Serum levels of both total and LDL-cholesterol were assessed before and after the test meal period and found to decrease significantly.
    Br J Nutr, 2012 · checked 2026-09-23
15. okr-c5-02 · meta-analysis of RCTs
    The meta-analysis revealed that okra supplementation significantly reduced fasting blood glucose (FBG) (WMD: -21.72 mg/dL, 95% CI: -36.86 to -6.58, p = 0.005) and glycated hemoglobin (HbA1c) levels (WMD: -0.42%, 95% CI: -0.64 to -0.19, p < 0.001). However, no significant effects were observed on insulin levels (WMD: 0.54 μU/mL, 95% CI: -1.03 to 2.12, p = 0.498), insulin resistance as assessed by HOMA-IR (WMD: -0.31, 95% CI: -1.37 to 0.75, p = 0.566), body mass index (BMI) (WMD: -0.24 kg/m2, 95% CI: -0.62 to 0.14, p = 0.220), or body weight (WMD: -0.83 kg, 95% CI: -2.55 to 0.87, p = 0.338).
    Phytother Res, 2025 · checked 2026-09-23