Drug & supplement interaction

Macrobiotic Diet + Fluorouracil

Fluorouracil brand names: Efudex, Tolak.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Macrobiotic Diet and Fluorouracil in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

Know someone interested in this? Share
Facebook Post Reddit Email
On this page
Interaction report

Macrobiotic Diet and Fluorouracil

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Fluorouracil and Macrobiotic Diet in our sources. This does not guarantee that the combination is completely free of risk — research on Macrobiotic Diet alongside specific medications may be limited.

Worth understanding: our licensed dataset holds no drug-interaction record for Macrobiotic Diet at all — not against Fluorouracil, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

Macrobiotic Diet is an eating pattern rather than something you take. Ask your pharmacist or doctor before changing how you eat while on a prescribed medicine: some medicines are dosed around meals, and a change in diet can change how they work. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Macrobiotic Diet safety at a glance

Macrobiotic Diet overall Use caution Balanced versions can be healthy, but strict versions may cause nutrient deficiencies.
Pregnancy Use caution Strict versions may not provide enough protein, calories, or key nutrients; medical supervision is advised.
Breastfeeding Use caution Nursing parents need adequate calories and nutrients, so strict versions should be supervised by a clinician.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Fluorouracil and Macrobiotic Diet? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Macrobiotic Diet Itself Has Been Linked To

This is not an interaction — nothing below involves Fluorouracil. It is the side-effect record for Macrobiotic Diet on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Macrobiotic Diet, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • Bone thinning Worth acting on Additional detail

    “The macrobiotic diet has been associated with increased risk of rickets and osteoporosis, likely due to calcium and vitamin D deficiency. Following a strict macrobiotic diet that does not include additional intake of fish and fat has also been associated with reduced height for age in children less than 8-years-old.”

    Macrobiotic Diet · Natural Medicines adverse-effect record, reported in bone loss.

    1 source cited
    1. 27952. Dagnelie PC, Van Dusseldorp M, Van Staveren WA, Hautvast JG. Effects of macrobiotic diets on linear growth in infants and children until 10 years of age. Eur J Clin Nutr 1994;48 Suppl 1:S103-S111.

Everything above comes from the Natural Medicines adverse-effect record for Macrobiotic Diet — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Fluorouracil’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Fluorouracil column appears here.

Overlapping uses

What Fluorouracil Is Prescribed For, and What Macrobiotic Diet Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Fluorouracil is a prescription medicine with approved uses on its FDA label. Macrobiotic Diet is an eating pattern: what follows is what researchers have looked at it for, and how strong that evidence is.

Fluorouracil is prescribed for: Fluorouracil Injection is used to treat four types of adenocarcinoma (a common form of cancer that begins in glandular cells): cancer of the colon and rectum, breast cancer, stomach (gastric) cancer, and pancreatic cancer. It is nearly always given as part of a combination chemotherapy regimen alongside other cancer medicines, and the specific drugs paired with it depend on which cancer is being treated.

Macrobiotic Diet has been studied for:

  • Cancer studied, not established Macrobiotic Diet has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Macrobiotic Diet for cancer

    Although there has been interest in using the macrobiotic diet for various cancers, including colon cancer, there is insufficient reliable information about the clinical effects of the macrobiotic diet for these conditions.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Fluorouracil on your own; if you are taking Macrobiotic Diet for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Fluorouracil

This page covers Macrobiotic Diet only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fluorouracil page lists 26 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Alfalfa (moderate), Angelica Archangelica (moderate), Arrach (moderate), Bergamot (moderate) and Bishop's Weed (moderate).

By severity: 23 moderate · 3 minor.

From our pharmacist’s overview on the Fluorouracil page

“If you are using fluorouracil cream (Efudex, Tolak) on sun-damaged skin, your skin is already primed to react to sunlight, and that is where most of its supplement interactions sit. Of the 26 ingredients on file, 20 can make skin more sun-sensitive on their own, chlorophyll, chlorella, and bergamot oil among them, so pairing one with t…”

Reviewed by 2 · Jul 18, 2026

Open the Fluorouracil interaction page

How much people look this up

Where Macrobiotic Diet and Fluorouracil Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Macrobiotic Diet
Steady interest

#1,061 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Fluorouracil
Steady interest

#2,655 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Macrobiotic Diet reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Macrobiotic Diet and Fluorouracil records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Eating pattern

About Macrobiotic Diet

What is Macrobiotic Diet?

  • General wellness and longevity
  • Cancer prevention and support (popular belief)
  • Heart health
  • Weight management
  • Digestive health

The macrobiotic diet is a plant-based eating pattern centered on whole grains, vegetables, and beans, with limited animal products and processed foods. Some versions can be healthy, but strict versions risk nutrient shortfalls, and there is no strong proof it treats or cures diseases like cancer. Talk to your doctor or a dietitian before starting, especially if you have a health condition.

Whole-food eating plan based on whole grains, vegetables, and legumes

An interaction check asks whether these two react with each other — it does not ask whether Macrobiotic Diet is a good idea for someone in your situation. Here is what our Macrobiotic Diet record says about it on its own.

Macrobiotic Diet: dosing

There is no standard dose for a diet. Instead, macrobiotic eating is about food choices and proportions, often with grains making up a large share of meals and vegetables and beans filling the rest.If you want to try this way of eating, choose a balanced version, include a variety of foods, and avoid the most restrictive forms. Many people on plant-based diets need a vitamin B12 supplement, and possibly vitamin D, calcium, iron, or omega-3s. A registered dietitian can help you plan meals and decide which supplements you may need.

From our Macrobiotic Diet monograph — the full record covers uses, side effects and every documented interaction.

Read the full Macrobiotic Diet monograph & all interactions
Medication

About Fluorouracil Injection

What Is Fluorouracil Injection Used For?

Brand names: Efudex, Tolak

Fluorouracil Injection is used to treat four types of adenocarcinoma (a common form of cancer that begins in glandular cells): cancer of the colon and rectum, breast cancer, stomach (gastric) cancer, and pancreatic cancer.

It is nearly always given as part of a combination chemotherapy regimen alongside other cancer medicines, and the specific drugs paired with it depend on which cancer is being treated.

Most-Reported Side Effects for Fluorouracil

From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Diarrhea 6,992 reports
Neutropenia 5,174 reports
Nausea 5,001 reports
Vomiting 3,997 reports
Neuropathy peripheral 3,379 reports
See full Fluorouracil Injection drug information
Keep checking

Other Drugs & Macrobiotic Diet

Browse every other medication we’ve checked against Macrobiotic Diet — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Macrobiotic Diet against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Macrobiotic Diet list.

See the full Macrobiotic Diet interactions page
See every supplement checked against Fluorouracil, ranked by severity
Evidence & sources

Macrobiotic Diet References

The 3 references that drive our Macrobiotic Diet monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Van Staveren WA, Dagnelie PC. Food consumption, growth, and development of Dutch children fed on alternative diets. Am J Clin Nutr 1988;48(3 Suppl):819-21. PubMed
  2. Louwman MW, Van Dusseldorp M, van de Vijver FJ, et al. Signs of impaired cognitive function in adolescents with marginal cobalamin status. Am J Clin Nutr 2000;72(3):762-9. PubMed
  3. Dagnelie PC, Van Dusseldorp M, Van Staveren WA, Hautvast JG. Effects of macrobiotic diets on linear growth in infants and children until 10 years of age. Eur J Clin Nutr 1994;48 Suppl 1:S103-S111.

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Following Macrobiotic Diet While Taking Fluorouracil: Common Questions

Is it safe to follow Macrobiotic Diet while taking Fluorouracil?
We do not list a known interaction between Macrobiotic Diet and Fluorouracil. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Are Macrobiotic Diet and Fluorouracil used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Macrobiotic Diet in each. That is a conversation for your prescriber, especially if Fluorouracil is being adjusted to a target.
Does Fluorouracil interact with any supplements?
Yes. Fluorouracil has documented interactions with 26 supplements in our database — Macrobiotic Diet is not one of them. The Fluorouracil interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Macrobiotic Diet monograph Uses, safety profile, and every drug interaction in one place Fluorouracil Injection drug information The full plain-English guide to this medication Fluorouracil supplement interactions Every supplement checked against Fluorouracil, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Fluorouracil and Macrobiotic Diet?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.