Cucurbita moschata

BotanicalBest with a meal

What is it

Cucurbita moschata is the species that includes butternut squash, calabaza, and several pumpkin varieties. The seeds and seed oil are used as both food and supplements; the flesh is a common vegetable.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Vitamin A (provitamin A) source

Strong Evidence

The orange flesh is a well-established source of beta-carotene, which the body converts to vitamin A.

Overactive bladder / urinary symptoms

Good Evidence

Several small trials of pumpkin seed extract suggest modest improvements in overactive bladder symptoms in men and women. Effects are moderate, not dramatic.

How it works

The seeds are rich in protein, magnesium, zinc, plant sterols, and tocopherols. Seed oil supplies polyunsaturated fatty acids. The seeds and oil have been studied mostly for urinary and prostate complaints, with plant sterols and zinc believed to contribute to the effects. The flesh provides beta-carotene, fiber, potassium, and vitamin C. It is well-established as a nutrient-dense vegetable. As a supplement, pumpkin seed oil products from Cucurbita moschata are studied for prostate and bladder health.

Dosage

Pumpkin seed oil studies typically use 320-1000 mg/day for prostate or bladder support. Seed itself is consumed in normal food quantities (a handful). There is no formal RDA.

When and how to take it

Pumpkin seed oil supplements are typically taken with meals to improve absorption of fat-soluble constituents. As a food, consume anytime.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Pumpkin seed oil

Used in prostate and bladder health products.

Concentrated source of polyunsaturated fats and plant sterols.

Pumpkin seed powder

Whole-food form.

Provides protein, zinc, magnesium, and fiber.

Safety

Cucurbita moschata products are generally well tolerated as both food and supplement. Mild GI symptoms are uncommon. Pumpkin seed allergies, while rare, occur. Long-term safety at typical doses is well established by traditional use.

Who should be cautious

Generally safe in pregnancy and breastfeeding as food. Concentrated extracts should be used cautiously without specific clinical guidance. Allergy is rare but possible.

Interactions

Pumpkin seed extracts have mild diuretic-like effects in some studies; theoretical interaction with diuretics. No major clinically significant interactions documented.

Food sources

Butternut squash, cooked

Amount
1 cup
%DV
—

Pumpkin seeds, roasted

Amount
1 oz
%DV
—

Frequently asked questions

Is butternut squash the same species as pumpkin?⌄

Butternut is Cucurbita moschata. Most jack-o-lantern pumpkins are Cucurbita pepo. They are related but separate species.

Does pumpkin seed oil help an enlarged prostate?⌄

Small studies suggest modest symptom improvement. It is not a substitute for proven medications when symptoms are significant.

References

Cucurbita moschata on Wikidata — Wikidata link

Cucurbita moschata on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Cucurbita moschata (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.