What to Drink to Get Rid of Parasites: What Works?

No drink has been proven in large human trials to reliably eliminate a parasitic infection on its own. Standard antiparasitic medications, prescribed after a confirmed diagnosis, remain the only treatments with consistently high cure rates across different types of worms and protozoa. That said, a handful of drinkable preparations, from papaya seed elixirs to garlic-infused concoctions, have shown genuine antiparasitic activity in laboratory and animal research, and one small human trial produced striking results. The gap between a promising lab finding and a proven treatment is wide, though, and understanding where each remedy actually stands on that spectrum is the difference between informed self-care and wishful thinking.

Start With a Diagnosis, Not a Drink

Parasitic infections are not one thing. Roundworms, hookworms, tapeworms, pinworms, Giardia, Cryptosporidium, and dozens of other organisms all behave differently, live in different parts of the body, and respond to different treatments. A drink that might help with one parasite could be completely useless against another. Before reaching for any remedy, you need to know what you’re dealing with.

Getting a reliable diagnosis means providing stool samples, ideally collected over several days. Because many parasites shed eggs or cysts irregularly, a single stool test can miss an active infection. Guidelines recommend collecting samples from different parts of the stool over a roughly ten-day window at two-to-three-day intervals to improve the odds of detection, and samples should be gathered before starting any medication or at least one to three weeks after stopping antibiotics or antiparasitic drugs.¹ Skipping this step and self-treating with a “parasite cleanse” drink means you may be targeting something you don’t have, or ignoring something you do.

Papaya Seed Elixir Has the Strongest Human Evidence

Of all the drinkable remedies studied, a preparation made from air-dried papaya seeds mixed with honey produced the most impressive results in an actual human trial. In a pilot study of 60 children with confirmed intestinal parasites, those given the papaya seed and honey elixir had their stools cleared of parasites about 77% of the time, compared to roughly 17% in children given honey alone. The clearance rate ranged from about 71% to 100% depending on the specific parasite species, and no harmful side effects were reported.²

Those numbers are genuinely encouraging, but context matters. This was a single small study, a pilot with 60 participants. Pilot studies are designed to test whether a larger, more rigorous trial is worth running. They are not designed to prove that a treatment works across populations. No large follow-up trial has confirmed these results, and the study was conducted in a specific group of children in a tropical setting. Still, among the many natural antiparasitic claims floating around the internet, papaya seeds are one of the few with direct human evidence behind them. The traditional preparation involves drying the seeds, grinding them into a powder, and mixing with honey or water to make a drinkable mixture.

Garlic and Ginger Drinks

Garlic is probably the most widely recommended “natural antiparasitic” you’ll encounter online, and the research backing it is real but comes with a significant caveat: almost all of it was done in lab dishes or animals, not people.

Garlic’s sulfur-containing compounds, particularly allicin, have shown clear activity against Giardia, one of the most common waterborne parasites worldwide. In one study using gerbils, administering aged garlic extract or allicin reduced parasite numbers, and allicin eliminated the organisms entirely in experimentally infected animals.³ In hamsters, commercially available garlic supplements reduced Giardia cyst numbers by about 85% and trophozoite numbers by about 64%, which actually outperformed metronidazole, the standard pharmaceutical treatment, in that particular animal model.⁴ Ginger supplements tested alongside garlic in the same study performed similarly well, with about an 89% reduction in cyst numbers.

The one human study involving garlic is less exciting. When garlic was added to nitazoxanide, a standard antiparasitic drug, in children infected with Giardia or Blastocystis, the cure rate only inched up slightly, from 40% to 43%.⁵ That’s essentially no meaningful boost. Animal results don’t always translate to humans, and garlic’s antiparasitic compounds may not survive digestion and reach intestinal parasites at the concentrations needed. Drinking garlic tea or adding raw garlic to water is unlikely to hurt you, but claiming it will cure an infection is getting ahead of the evidence.

Pumpkin Seed and Wormwood Decoctions

Pumpkin seeds have centuries of traditional use against intestinal worms, and modern research supports the idea that they contain bioactive compounds with genuine antiparasitic effects. A decoction, essentially a liquid made by boiling the seeds, promoted the expulsion of Trichinella worms in mice by triggering an immune-mediated “weep and sweep” response in the gut lining.⁶ In sheep given pumpkin seed cake as a feed supplement, fecal egg counts for gastrointestinal nematodes dropped by about 53% over twelve days, while untreated sheep saw their counts increase.⁷

Wormwood, as the name practically advertises, has an even longer antiparasitic pedigree. Artemisia absinthium, the plant used to make absinthe, showed dose-dependent killing of tapeworm (Hymenolepis nana) in both lab and animal studies. At higher doses, it destroyed the parasite’s outer covering, ruptured internal structures, and degenerated eggs. The highest dose tested in mice produced results comparable to praziquantel, the standard prescription treatment for tapeworm.⁸ Wormwood also showed strong egg-killing effects against Haemonchus contortus, a common sheep parasite, in lab tests.⁹

The pattern here is consistent: these plant preparations genuinely damage or kill parasites. But the evidence comes from petri dishes, mice, and sheep. Pumpkin seed tea and wormwood tinctures are widely sold as “parasite cleanse” drinks, and they’re not pure nonsense. The biological activity is real. What’s missing is reliable evidence that drinking them at safe doses eliminates infections in humans. The concentrations that kill parasites in a lab dish may be far higher than what your gut sees after you sip a tea.

Green Tea

Green tea contains epigallocatechin gallate (EGCG), a compound that has attracted genuine research interest as an antiparasitic agent across several types of infections. In mice with Cryptosporidium, green tea extract significantly reduced the number of parasites shed in feces and improved intestinal tissue damage, working both as a preventive measure and a treatment after infection.¹⁰ EGCG also inhibited the growth of Babesia parasites, which cause a tick-borne illness, both in lab cultures and in infected mice, where the parasites were completely cleared within about two weeks of treatment.¹¹ Research has also pointed to EGCG’s potential against Leishmania, a parasite transmitted by sandflies, where it appears to disrupt the organism’s internal balance and trigger its death.¹²

Green tea is safe, widely available, and inexpensive. But the concentrations of EGCG used in these studies, often administered as purified extracts at controlled doses, are far higher than what you’d get from brewing a cup of tea. Nobody has demonstrated that simply drinking green tea cures a parasitic infection in humans. The research is exciting from a drug development perspective: scientists are studying EGCG as a potential starting point for new antiparasitic medications, not as proof that your afternoon cup of sencha is medicinal.

Coconut Oil and Fermented Drinks

Lauric acid, a fatty acid abundant in coconut oil and coconut milk, has shown anti-giardial activity in lab tests that’s comparable to metronidazole. It appears to accumulate inside the parasite’s cells and rupture their membranes.¹³ In hamsters, lauric acid alone reduced Giardia cyst counts by about 82%, and combining it with metronidazole pushed that figure to nearly 99%.¹⁴

Kefir, the tangy fermented milk drink, also has preliminary support. Mice fed kefir before and during Giardia infection showed significantly reduced parasite loads, and kefir appeared to restore immune defenses that the parasite had suppressed.¹⁵ The mechanism seems to involve boosting the gut’s own immune response rather than directly killing the parasite, which makes kefir more of a supportive measure than a standalone treatment.

Neither coconut products nor kefir have been tested as parasite treatments in human trials. But unlike some of the more exotic remedies on this list, they’re normal dietary items that carry essentially zero risk at reasonable amounts. If you’re dealing with a Giardia infection and want to complement your prescribed medication, there’s a plausible scientific rationale for incorporating these into your diet, even if the evidence doesn’t yet rise to “proven.”

How Standard Medications Compare

To put the natural remedies in perspective, here’s what pharmaceutical treatments achieve in human trials. These are the cure rates from clinical studies, not lab dishes or animal models:

• Hookworm: Albendazole achieves about a 72% cure rate.
• Roundworm (Ascaris): Ivermectin reaches 100%, albendazole about 88%, and nitazoxanide roughly 91%.
• Pinworm: Both albendazole and pyrantel pamoate exceed 94%.
• Strongyloides: Ivermectin achieves 93-97% cure rates.
• Whipworm: Even the best combination therapy (ivermectin plus albendazole) manages only 38-80%, making this one of the harder parasites to treat.

These numbers come from pooled clinical data across multiple studies.¹⁶ Even the “worst” pharmaceutical cure rate on this list, albendazole for hookworm at 72%, represents a level of evidence that no drinkable natural remedy has yet matched in humans. The medications are also given as short courses, often a single dose or a few days of pills, rather than weeks of drinking teas and tinctures.

This isn’t to say natural remedies are worthless. Several of the compounds discussed above are being actively investigated as potential new antiparasitic drugs or as complements to existing ones. The wormwood finding, where high-dose extract matched praziquantel’s performance in mice, is the kind of result that moves a compound forward in the drug development pipeline. But that pipeline exists for a reason: what works in a mouse at a controlled dose may not work, or may not be safe, when a person drinks it as a homemade preparation.

Risks of Unregulated Parasite Cleanse Products

The “parasite cleanse” market is booming, driven by social media claims that most people are walking around full of worms without knowing it. Many commercially sold cleanse products combine herbs like wormwood, black walnut hull, and cloves with aggressive laxatives. The laxative component is particularly concerning. Long-term use of strong herbal laxatives such as cascara sagrada, rhubarb, and senna can cause mucosal damage to the intestinal lining and carry real toxicity risks.¹⁷ Some products also contain fulvic or humic acids, which can trigger their own adverse effects.

The fundamental problem with these products isn’t just that the antiparasitic ingredients are unproven in humans. It’s that the products are marketed to people who haven’t been diagnosed with a parasitic infection at all. The “rope worms” and “liver flukes” that social media influencers show being expelled are frequently mucus casts from the intestinal lining, dislodged by the harsh laxatives in the cleanse itself. You can’t drink your way out of an infection you may not have, and the attempt can cause the very gut symptoms the product claims to fix.

Staying Hydrated During a Real Infection

If you do have a confirmed parasitic infection, especially one causing diarrhea, the most important thing you can drink isn’t antiparasitic at all. It’s an oral rehydration solution. Parasitic infections that cause diarrhea, particularly Giardia, Cryptosporidium, and various intestinal worms, can lead to dangerous fluid and electrolyte loss, especially in children. Oral rehydration therapy is the preferred treatment for mild to moderate dehydration from infectious diarrhea and has saved millions of lives globally.¹⁸ The WHO-approved reduced-osmolarity formula decreases episodes of diarrhea and vomiting and reduces the need for intravenous fluids.¹⁹

You can buy oral rehydration salts at most pharmacies, or make a basic version at home with clean water, salt, and sugar. This won’t kill any parasites, but it addresses the most immediate danger of the infection while you wait for antiparasitic medication to work.

The Bigger Role of Clean Water

Most intestinal parasites spread through water or soil contaminated with human feces. Soil-transmitted helminths, the group that includes hookworm, roundworm, and whipworm, infect hundreds of millions of people worldwide, overwhelmingly in areas with poor sanitation. Improvements in water supply, sanitation, and hygiene are considered essential for long-term, sustainable control of these infections.²⁰

For travelers and anyone in areas where water safety is uncertain, what you drink is more relevant as a prevention measure than as a treatment. Boiling water, using certified filters, and avoiding ice made from untreated water prevent far more parasitic infections than any herbal tea treats after the fact. Adequate water and sanitation practices prevent environmental contamination and cut off the transmission cycle that keeps parasites circulating in communities.²¹

Herbs as a Historical Starting Point

The idea of drinking something to expel parasites is not new or fringe. Plant-derived preparations were humanity’s original antiparasitic toolkit. Nordic countries, for instance, developed a rich tradition of herbal dewormers for both humans and livestock, with different regions relying on whatever plants grew locally. In some cases, the same plants gained reputations across wide geographic areas through trade and communication.²² A broad review of the modern literature found that among traditionally used herbs, oregano and thyme have been the most extensively studied for antiparasitic activity, and all the plants examined showed activity against the parasites they were tested against, though the vast majority of studies were conducted only in lab settings.²³

This historical continuity matters because it means the interest in plant-based antiparasitics isn’t purely a social media fad. People have been noticing that certain plants seem to help with worm infections for centuries. Modern science has confirmed that many of these plants do contain bioactive compounds that harm parasites. The disconnect is between “contains active compounds” and “works as a drinkable treatment in a living human body at a safe dose.” Bridging that gap requires the same rigorous clinical testing that produced albendazole and ivermectin, and for most herbal remedies, that testing simply hasn’t been done yet.