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Dietary supplement

EstroG-100 500 mg Ingredients & Drug Interactions

by Swanson Ultra

EstroG-100 500 mg label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking EstroG-100 500 mg against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

EstroG-100 500 mg is a dietary supplement by Swanson Ultra with 3 active ingredients. Its ingredients are commonly taken for general wellness and longevity, antioxidant support, heart and cholesterol health.Based on those ingredients, 186 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Angelica gigas standardized extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against EstroG-100 500 mg by Swanson Ultra

Ask about any prescription or over-the-counter medication and we check it for interactions with EstroG-100 500 mg by Swanson Ultra — and tell you which ingredient is responsible.

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Computed from our clinical databases

HelloPharmacist Scorecard of EstroG-100 500 mg by Swanson Ultra

Four independent checks of what is known — a summary of the available information, not a grade of the product itself.

Evidence for Intended Use
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

The stated purpose hasn't been mapped to our evidence data yet.

Why this rating?
  • We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
Ingredient Transparency
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 3 active ingredients.
  • “EstroG-100 Proprietary Blend” is a proprietary blend — the label gives one combined amount (500 mg) without saying how much of each component you get.
Known Interaction Concern
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Ashitaba.
  • The most serious interaction on file is rated Moderate.
  • For scale: 186 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.
Safety Information
Some gaps

Safety data exists for these ingredients, but with some important gaps.

Why this rating?
  • We hold adverse-effect (side-effect) data for 0 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

HelloPharmacist summaryFormula with limited ingredient disclosure with no assessable stated purpose. Moderate medication interactions have been identified, and some safety-information gaps remain.

Assessment coverage: 1 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Oct 23, 2019.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about EstroG-100 500 mg, straight from the product label.

Brand Swanson Ultra
Barcode (UPC) 087614027067
Net contents 30 Veggie Capsule(s)
Market status On market
Date entered into DSLD Oct 23, 2019
DSLD ID 207604
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Vegetarian, Adult Female (18 - 50 Years)
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for EstroG-100 500 mg by Swanson Ultra, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Veggie Capsule(s)
Maximum serving Sizes:
1 Veggie Capsule(s)
UPC/BARCODE
087614027067
IngredientAmount% DV
EstroG-100 Proprietary Blend500 mg--
Angelica gigas standardized extract0 NP--
Phlomis umbrosa standardized extract0 NP--
Cynanchum wilfordii standardized extract0 NP--

Other ingredients: Brown Rice Flour, Hypromellose, May contain one or both of the following

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
General Statements

The most advanced nutrition technology Veg caps

To reorder, call toll free 1-800-437-4148 or visit our website at www.swansonvitamins.com

Formula

Feminine balance formula

FDA Statement of Identity

Dietary Supplement

Seals/Symbols

Vegetarian Formula

Guaranteed Purity & Potency

Formulation

Vegetarian Formula

Precautions

Do not use if seal is broken.

Keep out of reach of children.

Storage

Store in a cool, dry place.

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take one veggie capsule per day with water.

Brand IP Statement(s)

EstroG-100 is a registered trademark of Sunbio Corporation.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

EstroG-100 500 mg by Swanson Ultra label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

EstroG-100 500 mg label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in EstroG-100 500 mg by Swanson Ultra

These are the 3 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Veggie Capsule(s) Dosage formCapsule Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

EstroG-100 Proprietary Blend

500 mg per serving

Other (inactive) ingredients: Brown Rice Flour, Hypromellose, May contain one or both of the following. These complete the product’s ingredient list but are not active constituents.

Interaction report

EstroG-100 500 mg by Swanson Ultra Drug Interactions

EstroG-100 500 mg contains 3 ingredients, and 1 of them has known drug interactions. Altogether it interacts with 186 medications. Here’s the picture, then you can look up your own drug.

Want to check YOUR meds against EstroG-100 500 mg?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
186Drugs
186 Moderate

Ingredients driving the most interactions

Angelica gigas standardized extract 186

Individual Drug Interactions

The ingredients in EstroG-100 500 mg interact with 186 drugs. Click any drug to see the details.

1 of the 3 ingredients in EstroG-100 500 mg interact with drugs. Each result below shows which ingredient is responsible. Angelica gigas standardized extract

Each ingredient & the kinds of drugs it affects

For each ingredient in EstroG-100 500 mg with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Angelica gigas standardized extract1 drug type · 186 drugs

Cytochrome P450 1A2 (Cyp1A2) Substrates

In vitro research shows that ashitaba extract inhibits cytochrome P450 (CYP) 1A2. Theoretically, concomitant use of ashitaba with CYP1A2 substrates might decrease the clearance of these substrates and increase the risk for adverse effects. However, this interaction has yet to be reported in humans. Until more is known, use with caution.

Likelihood Possible Evidence D
Angelica gigas standardized extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for EstroG-100 500 mg, from the product label.

Swanson Ultra

See all Swanson Ultra products
Name
Swanson Health Products
Street Address
PO BOX 2803
City
Fargo
State
ND
ZipCode
58108
Phone Number
1-800-437-4148
Web Address
www.swansonvitamins.com
Pharmacist Counseling Corner

EstroG-100 500 mg by Swanson Ultra: Common Questions

Does EstroG-100 500 mg by Swanson Ultra interact with any medications?
Yes. Based on its ingredients, EstroG-100 500 mg has a known interaction with 186 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
EstroG-100 500 mg contains 3 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.

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

Not sure if EstroG-100 500 mg is safe with your meds?

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Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

EstroG-100 500 mg label
Go deeper

The Full Monographs Behind EstroG-100 500 mg’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Ashitaba

Interacts with 186 drugs

Ashitaba is a leafy plant from Japan that is eaten as a vegetable and taken as a supplement for general health, antioxidant, and heart benefits. Most of the supporting research comes from la...

Read the full Ashitaba monograph →
Sources

Sources & How We Checked

EstroG-100 500 mg's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

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

The 2 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Ashitaba 2 references
  1. Kwon D, Yoon S, Carter O, Bailey GS, Dashwood RH. Antioxidant and antigenotoxic activities of Angelica keiskei, Oenanthe javanica and Brassica oleracea in the Salmonella mutagenicity assay and in HCT116 human colon cancer cells. Biofactors. 2006;26(4):231
  2. Noh HM, Ahn EM, Yun JM, Cho BL, Paek YJ. Angelica keiskei Koidzumi extracts improve some markers of liver function in habitual alcohol drinkers: a randomized double-blind clinical trial. J Med Food. 2015;18(2):166-72.

See these in context on the Ashitaba monograph →

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

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