Drug & supplement interaction

Docosahexaenoic Acid (dha) + Semaglutide

Semaglutide brand names: Ozempic, Rybelsus, Wegovy.

Moderate Interaction
Medically reviewed by · Updated October 2026
The bottom line Moderate

Docosahexaenoic Acid (dha) has a moderate interaction with Semaglutide. Theoretically, taking DHA with antidiabetes drugs might reduce the effects of these medications.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceB
What do Severity, Likelihood & Evidence mean?
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Interaction report

Docosahexaenoic Acid (dha) and Semaglutide

Here is the interaction we found between these two, with the evidence behind it.

Moderate

ANTIDIABETES DRUGS

Why this applies to Semaglutide

Semaglutide falls under ANTIDIABETES DRUGS — the group Docosahexaenoic Acid (dha) interacts with.

Theoretically, taking DHA with antidiabetes drugs might reduce the effects of these medications.
In people with type 2 diabetes, including those taking oral hypoglycemic medications, DHA seems to increase fasting blood glucose levels.
Severity Moderate Likelihood Possible Evidence B

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.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the gist: semaglutide (Ozempic, Wegovy, Rybelsus) lowers your blood sugar by helping your pancreas release insulin at the right times. DHA isn't broken down by semaglutide or vice versa, so this isn't a metabolism clash. Instead, some lower-quality studies suggest that in people with type 2 diabetes, concentrated DHA may nudge fasting blood sugar a little higher, which could work against what your semaglutide is trying to do.

This is a theoretical, modest concern, not a reason to panic. Fish in your diet is unlikely to matter much; high-dose supplements are where it could add up. If you take both, just keep an eye on your blood sugar readings and let your pharmacist or doctor know before starting DHA so they can help you watch your numbers.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Woodman RJ, Mori TA, Burke V, et al. Effects of purified eicosapentaenoic and docosahexaenoic acids on glycemic control, blood pressure, and serum lipids in type 2 diabetic patients with treated hypertension. Am J Clin Nutr 2002;76:1007-15.. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Docosahexaenoic Acid (dha) Also Interacts With Other Medications

Docosahexaenoic Acid (dha) has 374 moderate known drug interactions in our database — the Semaglutide one above is one of them. If you take anything else, check it against the full list below.

Moderate 374 No known interaction 2,456 (incl. Semaglutide)
Taking anything else?

Check Another of Your Medications Against Docosahexaenoic Acid (dha)

Covers the 2,830 medications we’ve checked against Docosahexaenoic Acid (dha). Pick one to open its full report.

From our Q&A

Questions About Docosahexaenoic Acid (dha) or Semaglutide

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Docosahexaenoic Acid (dha) or Semaglutide, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Semaglutide

This page covers Docosahexaenoic Acid (dha) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Semaglutide page lists 256 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Siberian Cocklebur (major), Acai (moderate), African Wild Potato (moderate) and Agaricus Mushroom (moderate).

By severity: 2 major · 215 moderate · 39 minor.

From our pharmacist’s overview on the Semaglutide page

“Semaglutide (Ozempic, Rybelsus, Wegovy) lowers blood sugar, and so do most of the 256 supplements on this page, which is why I read this list with real vigilance rather than a shrug. Nearly all of the entries either add to its glucose-lowering effect and raise the risk of hypoglycemia, or push sugar the other way and blunt it, as niaci…”

Reviewed by 2 · Jul 18, 2026

Open the Semaglutide interaction page

How much people look this up

Where Docosahexaenoic Acid (dha) and Semaglutide 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 Docosahexaenoic Acid (dha)
Top half

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

29 days ago today
Medication Semaglutide
Top 5%

#36 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.

Supplement

About Docosahexaenoic Acid (dha)

What is Docosahexaenoic Acid (dha)?

Docosahexaenoic Acid (dha)
  • Brain and cognitive health
  • Eye and vision health
  • Fetal and infant development
  • Heart and triglyceride support
  • General omega-3 supplementation

DHA is an omega-3 fatty acid found in fatty fish and algae that is a building block for the brain, nervous system, and eyes. It is widely used and generally well tolerated, with the strongest support for fetal/infant development and lowering triglycerides; evidence for many other uses is mixed. Talk with your pharmacist or doctor before starting, especially if you are pregnant, have a bleeding risk, or take blood thinners.

Read the full Docosahexaenoic Acid (dha) monograph & all interactions
Medication

About Semaglutide

What Is Semaglutide Used For?

Brand names: Ozempic, Rybelsus, Wegovy

Semaglutide is used for several conditions, depending on the product. Wegovy is used with a reduced-calorie diet and more physical activity to reduce excess body weight and keep it off long term. It is also used to lower the risk of major cardiovascular events (heart-related death, non-fatal heart attack, or non-fatal stroke) in adults with established cardiovascular disease and either obesity or overweight.

Wegovy injection is also used for adults with noncirrhotic MASH (a fatty liver disease) with moderate to advanced liver scarring, and for weight management in children 12 and older with obesity. Ozempic is an injection used with diet and exercise to improve blood sugar control in adults with type 2 diabetes. It also lowers the risk of major cardiovascular events in adults with type 2 diabetes and established cardiovascular disease. Ozempic is not for type 1 diabetes.

See full Semaglutide drug information
Keep checking

Other Drugs & Docosahexaenoic Acid (dha)

Browse every other medication we’ve checked against Docosahexaenoic Acid (dha) — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
374Moderate
0Minor
2,455No known interaction
374 Moderate 2,455 No interaction
Moderate

374 interactions

Showing 60 of 374 moderate interactions — see all 374 on the Docosahexaenoic Acid (dha) page.

No interaction 2,455 drugs checked — show the list

We also checked Docosahexaenoic Acid (dha) against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,455 medications checked with no known interaction — see the full Docosahexaenoic Acid (dha) list.

See the full Docosahexaenoic Acid (dha) interactions page
See every supplement checked against Semaglutide, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Docosahexaenoic Acid (dha) monograph › Uses, safety, and every drug interaction in one place Semaglutide supplement interactions › Every supplement checked against Semaglutide, ranked by severity Semaglutide drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Docosahexaenoic Acid (dha) and Semaglutide Together: Common Questions

Can you take Docosahexaenoic Acid (dha) with Semaglutide?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Docosahexaenoic Acid (dha) and Semaglutide interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Semaglutide and Docosahexaenoic Acid (dha)?

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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.