Herb & supplement monograph

Fermented Wheat Germ Extract Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Fermented Wheat Germ Extract interacts with medications. The heart of this page is the interaction list — every drug Fermented Wheat Germ Extract is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Fermented Wheat Germ Extract is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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On this page

Interaction report

Drugs that interact with Fermented Wheat Germ Extract

303 medications have a known interaction with Fermented Wheat Germ Extract, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Fermented Wheat Germ Extract using our pharmacist-reviewed interaction data.

AI summaries are generated from our Fermented Wheat Germ Extract interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact Fermented Wheat Germ Extract combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Fermented Wheat Germ Extract affects

Every type of medication (drug category) Fermented Wheat Germ Extract is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 2 drug categories Fermented Wheat Germ Extract interacts with

ImmunosuppressantsSerotonergic Drugs

Immunosuppressants

Theoretically, fermented wheat germ extract might decrease the effects of immunosuppressants.
Animal research suggests that fermented wheat germ extract can stimulate immune function.

Likelihood Possible Evidence D

Serotonergic Drugs

Theoretically, concomitant use of fermented wheat germ extract with serotonergic medications may increase the risk of serotonergic adverse effects.
Animal research shows that fermented wheat germ can increase levels of serotonin in the brain.

Likelihood Possible Evidence D

Monograph

Fermented Wheat Germ Extract: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Fermented wheat germ extract is a supplement made by fermenting wheat germ with yeast, and it is most often marketed for people going through cancer treatment. While some early research and a few small studies are interesting, the overall evidence is limited and far from conclusive, so it should never replace standard medical care. Talk with your oncologist or pharmacist before using it, since it is a supplement and not an approved treatment.

Scientific name: Triticum aestivum
Family: Poaceae
Part used: Wheat germ (fermented with baker's yeast, Saccharomyces cerevisiae)
Common forms: Powder (to mix in water or juice), capsules, tablets

People commonly use it for

Cancer supportive care (as a complementary product)
Immune support
General wellness during cancer treatment
Antioxidant support
Fatigue during illness

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally tolerated in short-term studies, but long-term safety is not well established and people with cancer should clear it with their care team.

PregnancyBest avoided

There is not enough safety data, so it is best avoided during pregnancy.

BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Fermented wheat germ extract (often sold under brand names) is a dietary supplement made from wheat germ, which is the nutrient-rich inner part of the wheat kernel. The wheat germ is fermented using baker's yeast, a process that changes its chemistry and concentrates certain natural compounds.

Wheat is one of the most widely grown grains in the world. The germ is a byproduct of milling wheat into flour. After fermentation, the extract is dried into a powder and sold as a drink mix, capsules, or tablets.

This product is most commonly marketed to people with cancer as a complementary or supportive supplement. It is important to understand that it is sold as a dietary supplement, not as a drug, and it has not been approved to treat any disease.

How it works

Fermenting wheat germ with yeast produces natural compounds, including substances called benzoquinones (such as 2,6-dimethoxy-1,4-benzoquinone), which are thought to be among the active ingredients.

Laboratory and animal studies suggest these compounds may affect how cells use sugar (glucose metabolism) and may influence certain immune cells. Researchers have proposed that this could make some cancer cells more vulnerable, but most of this work has been done in test tubes or animals, not confirmed in people.

In short, the proposed mechanisms are interesting but unproven in humans. What happens in a lab dish does not always translate into real benefits for patients.

Effectiveness

Does Fermented Wheat Germ Extract work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 6 uses evaluated

6 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

For Fermented Wheat Germ Extract, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 6 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Chemotherapy-related infection