Prickly pear: no weight loss in the trials, and respect the seeds

Prickly pear is sold as a slimming aid, and the best evidence says it does not deliver that. A meta-analysis of 5 randomized trials, mostly of Opuntia supplements such as extracts and cactus pad products rather than the fresh fruit, found no significant difference in body weight against control: -1.8 lb (-0.83 kg), with a 95% confidence interval running from -2.49 to +1.8 lb (0.83 kg). The same analysis reported lower BMI, body fat, blood pressure and total cholesterol, but the trials disagreed with each other sharply (I2 of 93%) and were poorly reported. Side effects reported in those trials included gastric intolerance and flu symptoms. The hangover claim fares no better. A systematic review of 8 randomized hangover trials included one Opuntia extract, and it showed no significant overall benefit. The fresh fruit is a modest one. UK tables give 49 calories, 11.5 g of sugars and 22 mg of vitamin C per 3.5 oz (100 g) of flesh and seeds. The single USDA record for raw fruit gives 14 mg of vitamin C, 85 mg of magnesium and 3.6 g of fiber per 3.5 oz (100 g), so the two tables differ by about a third on vitamin C and magnesium.

The numbers, per 3.5 oz (100 g)

How much is actually in it

• UK data list prickly pear flesh and seeds at 49 calories, 11.5 g sugars, 57 mg magnesium and 22 mg vitamin C per 3.5 oz (100 g). — CoFID 2021 Prickly pears, flesh and seeds (14-230) (n = 1 record) Evidence E source
  49 calories, carbohydrate 11.5 g, total sugars 11.5 g, water 85.2 g, calcium 53 mg, magnesium 57 mg, potassium 210 mg, vitamin C 22 mg per 3.5 oz (100 g)
• USDA data list raw prickly pears at 85 mg magnesium, 14 mg vitamin C and 3.6 g fiber per 3.5 oz (100 g), with no sample-level spread. — USDA SR Legacy Prickly pears, raw (FDC 167750) (n = 1 record) Evidence E source
  Magnesium 85 mg, vitamin C 14 mg, fiber 3.6 g per 3.5 oz (100 g); across 3 USDA records vitamin C 6.2-14 mg, magnesium 69-85 mg

What your body absorbs

• Lab measures in 48 men with heart disease given about 50 mg of betalains from Opuntia stricta or beetroot extract found minimal betanin in plasma and 0.13-0.93% in urine. — 48 male patients with coronary artery disease (n = 48) Evidence C source
  Minimal plasma betanin; urinary recovery about 0.13-0.93% of dose

What it does to your health

• A meta-analysis of 5 randomized trials found cactus pear products did not change body weight versus control (mean difference -1.8 lb (95% CI -5.5 to 1.8; metric: -0.83 kg, -2.49 to 0.83)). — participants of 5 randomized clinical trials of Opuntia ficus-indica (n = 5 trials) Evidence A source
  Body weight MD -1.8 lb (95% CI -5.5 to 1.8; I2 = 93%; metric: -0.83 kg, -2.49 to 0.83); reductions in BMI, body fat, blood pressure and total cholesterol
• In a crossover RCT of 17 healthy men, 8.5 fl oz (250 mL) of prickly pear juice with a high-fat muffin did not change cholesterol or triglycerides over 3 hours versus placebo. — 17 healthy men (n = 17) Evidence B source
  No differences for TC, TG, LDL-C or HDL-C over 3 h; lower HRV measure (P 0.001-0.020)
• A systematic review of 11 studies linked prickly pear fruit to lower total cholesterol in all but one fruit study, while cactus pads (cladodes) had little effect on lipids. — healthy, obese, type 2 diabetes and metabolic syndrome populations (n = 11 studies) Evidence C source
  Fruit: TC reduced (p < 0.05) in all but one study; cladode: small effect on lipids

Safety, limits and interactions

• In a hospital record review in northern Israel, prickly pear seeds formed the rectal bezoar in 12 of 30 adults with seed-related fecal impaction. — adults hospitalized with fecal impaction, Western Galilee Hospital, 1996-2005 (n = 30) Evidence C source
  Prickly pear seeds in 12 of 30 seed bezoars; all 30 needed disimpaction under general anesthesia
• In a hospital review of 53 children with rectal seed bezoars, 6 were caused by prickly pear seeds, mostly in summer. — children with fecal impaction, university-affiliated hospital, 1996-2005 (n = 53) Evidence C source
  Prickly pear seeds in 6 of 53 bezoars; 50 of 59 children treated under general anesthesia
• Observational data from 207 Mexican women linked prickly pear intake to non-significantly higher DDE pesticide residue in body fat. — 207 Mexican women in states with high and low DDT exposure (n = 207) Evidence C source
  Non-significant increase in adipose DDE with prickly pear consumption

What people believe that the data does not support

• A systematic review of 8 randomized trials, one testing Opuntia ficus-indica, found no compelling evidence that any remedy prevents or treats alcohol hangover. — participants of 8 double-blind randomized trials of hangover remedies (n = 8 trials) Evidence A source
  No significant overall benefit for Opuntia ficus-indica; only tolfenamic acid, borage GLA and a yeast preparation showed differences
• The EU did not authorize the claim that a dehydrated prickly pear cactus leaf product improves blood lipids. — EU health claim applicants Evidence E source
  Claim status: Non-authorized
• The EU did not authorize a claim that a supplement with opuntia fruit extract and vitamins reduces sperm DNA damage. — EU health claim applicants Evidence E source
  Claim status: Non-authorized

Who this works differently for

• In an uncontrolled trial of 10 patients with familial hypercholesterolemia, 6 weeks of daily prickly pear lowered LDL cholesterol from 210.5 to 176.4 mg/dl. — 10 patients with isolated heterozygous familial hypercholesterolemia (n = 10) Evidence C source
  Total cholesterol 298.0 to 268.0 mg/dl; LDL 210.5 to 176.4 mg/dl; HDL and triglycerides unchanged
• In an uncontrolled study, 8.8 oz (250 g) of prickly pear a day reduced platelet activation markers in 8 healthy adults and 8 adults with mild familial hypercholesterolemia. — 8 healthy volunteers and 8 patients with mild familial heterozygous hypercholesterolemia (n = 16) Evidence C source
  Lower platelet factor 4, beta-thromboglobulin and ADP-induced aggregation; platelet count unchanged

The bottom line

The cholesterol story for the fruit itself is unclear, and the reason is how it was studied. A systematic review of 11 studies in healthy, obese, diabetic and metabolic syndrome groups found lower total cholesterol after prickly pear fruit in all but one study. The designs were mixed and nobody pooled them into one estimate. In 10 adults with inherited high cholesterol (familial hypercholesterolemia), 6 weeks of added prickly pear after a diet run-in took LDL from 210.5 to 176.4 mg/dl, with no control group and no dose stated in the abstract. Another uncontrolled study gave 8.8 oz (250 g) a day to 8 healthy adults and 8 with mild familial hypercholesterolemia and saw lower blood markers of platelet activation, which are lab signals and not heart attacks or strokes. Very little of the red pigment gets through. In 48 men with coronary artery disease given about 50 mg of betalains as an Opuntia stricta or beetroot extract, betanin in plasma was minimal and 0.13 to 0.93 percent of the dose turned up in urine. The caution with real evidence behind it is the seeds. In hospital records from northern Israel for 1996 to 2005, prickly pear seeds formed the rectal blockage in 12 of 30 adults admitted with seed impaction, and all 30 needed it removed under general anesthesia. These are case series from single hospitals that did not record how much fruit anyone ate, and the authors warn that large quantities may cause impaction. A matching review of 53 children with rectal seed blockages found prickly pear seeds in 6, mostly in summer, so the warning applies to children too. In 207 Mexican women, eating prickly pear went with slightly more of the old pesticide residue DDE in body fat, a difference that was not statistically significant. We found no studies on pregnancy, kidney disease or drug interactions with the fruit, so this page cannot tell you anything either way about those. The EU has refused two health claims built on Opuntia: one for a dried cactus leaf product and blood lipids, and one for a fruit extract combined with vitamins and sperm DNA damage.

Sources

1. prpr-r5-09 · food composition dataset
   Prickly pears, flesh and seeds (14-230): Energy 49 kcal | Carbohydrate 11.5 g | Total sugars 11.5 g | Water 85.2 g | Calcium 53 mg | Magnesium 57 mg | Potassium 210 mg | Vitamin C 22 mg
   CoFID 2021 (Public Health England, OGL v3.0), code 14-230 Prickly pears, flesh and seeds · checked 2026-10-02
2. prpr-r5-10 · food composition dataset
   Prickly pears, raw, fdc_id 167750: Magnesium 85 mg | Vitamin C 14 mg | Fiber 3.6 g per 100 g
   USDA FoodData Central SR Legacy 2018, Prickly pears, raw, fdc_id 167750 · checked 2026-10-02
3. prpr-r5-11 · pharmacokinetic study within pilot trial
   During an acute phase, 48 male patients received about 50 mg betalain/betacyanin, and their blood and urine samples were collected at 3, 8, and 24 hours after supplementations. ... After these interventions, minimal amounts of betanin were found in plasma and about 0.13-0.93% in urine.
   Food Funct, 2019 · checked 2026-10-02
4. prpr-r5-01 · meta-analysis of RCTs
   Meta-analysis revealed a nonsignificant difference in body weight between OFI and controls (mean difference = -0.83 kg; 95% confidence interval, -2.49 to 0.83; I(2) = 93%). Significant reductions in body mass index, percentage body fat, systolic and diastolic blood pressures, and total cholesterol were observed. Adverse events included gastric intolerance and flu symptoms.
   Nutrition, 2015 · checked 2026-10-02
5. prpr-r5-02 · randomized controlled trial
   This was a double-blind, randomized, placebo-controlled, crossover trial with 17 healthy men (body mass index 22.6 ± 2.04 kg/m2; 29.5 ± 7.19 y of age). Participants consumed PP juice (250 mL; 45 mg betalain content; reduced fiber) or a simple placebo drink (water-based), with a high-fat muffin (50 g fat) to determine potential effects on physiologic and biological responses, for up to 3 h post-consumption (hourly, 2 sessions, 7-d washout period).
   Nutrition, 2022 · checked 2026-10-02
6. prpr-r5-05 · systematic review
   PP consumption was associated with significant reductions in TC (p < 0.05) in all but one included study, whereas in the remaining studies (n=6), LDL-C levels decreased (p < 0.05). Separately, the effect of CLD consumption on lipids was small with one study reporting a significant increase in plasma HDL-C in a subgroup of participants (>45 years of age) following consumption of a patented CLD powder product.
   Complement Ther Med, 2020 · checked 2026-10-02
7. prpr-r5-12 · retrospective case series
   The seed bezoars were composed of prickly pear seeds in 12 patients, watermelon seeds in 10 patients, sunflower seeds in 4 patients, popcorn kernels in 1 patient, and pomegranate seeds in 1 patient. ... The consumption of seeds with shell fragments or fruits containing many seeds (such as the prickly pear) should be accompanied by the awareness that large quantities may cause fecal impaction.
   Fecal impaction in adults: report of 30 cases of seed bezoars in the rectum. Diseases of the Colon and Rectum, 2006 · checked 2026-10-02
8. prpr-r5-13 · retrospective case series
   A total of 53 had rectal seed bezoars: watermelon seeds in 43 children, prickly pear seeds in 6, sunflower seeds in 3, and pumpkinseeds in 1. ... There was summer seasonal preference for watermelon and prickly pear seed bezoars, whereas sunflower seed bezoars occurred in the spring.
   Fecal impaction in children: report of 53 cases of rectal seed bezoars. Journal of Pediatric Surgery, 2007 · checked 2026-10-02
9. prpr-r5-14 · observational study
   Adipose tissue DDE levels increased significantly with age (p = 0.005) and residence in coastal areas (p = 0.002) and non-significantly with the consumption of onion, cauliflower, prickly pear, squash blossoms, sweet corn, broad beans, chili pepper sauce, ham, and fish.
   Cad Saude Publica, 2002 · checked 2026-10-02
10. prpr-r5-06 · systematic review of RCTs
    Significant intergroup differences for overall symptom scores and individual symptoms were reported only for tolfenamic acid, gamma linolenic acid from B officinalis, and a yeast based preparation. CONCLUSION: No compelling evidence exists to suggest that any conventional or complementary intervention is effective for preventing or treating alcohol hangover.
    BMJ, 2005 · checked 2026-10-02
11. prpr-r5-07 · regulatory decision
    POL-HC-6279 NeOpuntia®, containing dehydrated leaves of the prickly pear cactus (Opuntia ficus-indica) NeOpuntia® helps to improve blood lipid parameters associated with cardiovascular risks, especially the HDL-cholesterol. -/- Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-6279, snapshot 2026-09-21 · checked 2026-10-02
12. prpr-r5-08 · regulatory decision
    POL-HC-8503 Condensyl® The combination of opuntia fruit dry extract standardised in quercetin and betalain, N-acetyl cysteine, zinc, vitamin B3, E, B6, B2, B9 and B12 in Condensyl® decreases sperm DNA damage (sperm nuclear decondensation index and DNA fragmentation index). High sperm DNA damage (sperm nuclear decondensation index and DNA fragmentation index) is a risk factor for male subfertility/infertility. -/- Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-8503, snapshot 2026-09-21 · checked 2026-10-02
13. prpr-r5-03 · uncontrolled clinical trial
    We therefore examined 10 patients with isolated heterozygous familial hypercholesterolemia (FH) being enrolled in a dietary run-in phase of 6 weeks after dietary counselling and a further 6 weeks of prickly pear addition. ... Total (298.0 --> 268.0 mg/dl; p < 0.0001) and LDL-cholesterol (210.5 --> 176.4 mg/dl; p = 0.0001) were significantly affected, while HDL (p = 0.0629) and triglycerides were not.
    Nucl Med Rev Cent East Eur, 2003 · checked 2026-10-02
14. prpr-r5-04 · uncontrolled clinical trial
    We examined the effect of daily consumption of 250 g in 8 healthy volunteers and 8 patients with mild familial heterozygous hypercholesterolemia on various parameters of platelet function. Beside its action on lipids and lipoproteins, prickly pear consumption significantly reduced the platelet proteins (platelet factor 4 and beta-thromboglobulin), ADP-induced platelet aggregation and improved platelet sensitivity (against PGI2 and PGE1) in volunteers as well as in patients.
    Prostaglandins Leukot Essent Fatty Acids, 2003 · checked 2026-10-02