No known drug interactions for the matched ingredients — not a guarantee none exist. Check your meds →
Dietary supplement

Indigo Ingredients & Drug Interactions

by Herbal Terra

Indigo label
See full label image
Liquid Category: Botanical
No known interaction
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Indigo 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 No known interaction

Indigo is a dietary supplement by Herbal Terra with 1 active ingredient. Its ingredients are commonly taken for colds and flu-like illness, sore throat, fever.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.

Jump to a section

HelloPharmacist Scorecard of Indigo by Herbal Terra

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: Indigo Leaf Extract, Dry (from the Isatis plant). Indigo has been used in traditional medicine, though we have limited human safety data on it.

The liquid also contains alcohol, water, and glycerin as inactive ingredients.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
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

This product doesn't appear to be marketed for a specific use, so we graded Isatis's overall clinical evidence instead.

Moderate

Some clinical evidence supports Isatis for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Psoriasis — rated "Possibly Effective" (Natural Medicines).

The evidence for Indigo is mixed. It's rated possibly effective for psoriasis.

For respiratory tract infections, prostate cancer, ulcerative colitis, hepatitis, and aging skin, the evidence isn't established enough for us to rate it—we simply don't have reliable data either way.

The evidence, ingredient by ingredient Isatis

How safe is it?

Some data gaps
Safety Information · database check
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.

Indigo Leaf Extract has been used short-term in traditional medicine, but human safety data are limited, so caution is warranted. The safety data advises against use during pregnancy and while breastfeeding, since there isn't enough reliable information to know it's safe in those situations.

Side effects, ingredient by ingredient Isatis

Meds to double-check

No known interactions
Known Interaction Concern · database check
No known interactions

No medication interactions are currently documented for the matched ingredients — that isn't a guarantee none exist.

Why this rating?
  • None of the 1 matched ingredient has a documented medication interaction on file.

No interactions are documented for this ingredient in our data.

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. No medication interactions are currently documented, and some safety-information gaps remain.

If you're looking at this for psoriasis, there's some evidence it may help. For other uses, the evidence isn't clear yet.

Because safety data are sparse, talk with your pharmacist or doctor before starting—especially if you're pregnant, breastfeeding, or taking other medications.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Aug 22, 2025.

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 Indigo, straight from the product label.

Brand Herbal Terra
Barcode (UPC) 7439500554530
Net contents 2 Fluid Ounce(s); 60 mL
Market status On market
Date entered into DSLD Aug 22, 2025
DSLD ID 325121
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Sugar Free
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 Indigo by Herbal Terra, 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 mL
Maximum serving Sizes:
1 mL
Servings per container
60
UPC/BARCODE
7439500554530
IngredientAmount% DV
Indigo Leaf Extract, Dry983 mg--

Other ingredients: Alcohol, Water, Glycerin

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.
Suggested/Recommended/Usage/Directions

Shake well before use. Adults take up to 30 drops (1 mL, one full squeeze of the dropper bulb) in 3-4 fl. oz. of juice or water up to 4 times a day.

Precautions

We recommend to seek expert medical advice before taking. May have contraindications and cause adverse reaction.

Consult a physician before giving to children under 18, before using during pregnancy, if nursing, or if you are on any medications.

Consult a physician before giving to children under 18, before using during pregnancy, if nursing, or if you are on any medications. Keep out of the reach of children!

Do not use if you are allergic to any ingredients.

Storage

Store in a cool, dry, dark place.

FDA Disclaimer Statement

This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure or prevent any disease.

Formulation

cGMP Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.

Sugar free

Expertly extracted 100% natural Premium product

Organic alcohol

No artificial ingredients, color additives, fillers or binders.

Natural Gluten free

Formula

Isatis tinctoria

Organic alcohol

FDA Statement of Identity

Herbal Supplement

Seals/Symbols

Made in USA

General Statements

Organic Raw Material.

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

See for yourself

Indigo by Herbal Terra label

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

Indigo 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 Indigo by Herbal Terra

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 mL Dosage formLiquid Servings per container60 Amounts shown are per serving.

Indigo Leaf Extract, Dry

No known
interactions
983 mg per serving Form: Isatis tinctoria Leaf Extract, Dry

Isatis is a plant long used in traditional Chinese medicine, mainly for sore throats, fevers, and colds. Modern evidence in people is very limited, so...

Indigo Leaf Extract, Dry monograph & interactions

Other (inactive) ingredients: Alcohol, Water, Glycerin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Indigo by Herbal Terra Drug Interactions

We don’t currently list any known drug interactions for the mapped ingredients in Indigo. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.

The maker

Brand information

Manufacturer and brand details for Indigo, from the product label.

Herbal Terra

See all Herbal Terra products
Name
Herbal Terra LLC
Phone Number
+18083857868
Web Address
herbalterra.com
Pharmacist Counseling Corner

Indigo by Herbal Terra: Common Questions

Does Indigo by Herbal Terra interact with any medications?
We do not currently list a known interaction for the mapped ingredients in Indigo. This does not guarantee none exist, so confirm with your pharmacist.
How can one product interact with so many drugs?
Indigo contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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.
Does Indigo work for psoriasis?
It's rated possibly effective for psoriasis based on the evidence we have. That means there's some support for it, but we don't have enough solid data to call it proven. Talk with your doctor about whether it fits your treatment plan.
Can I take this while I'm pregnant?
No—the safety data advises against it during pregnancy. There isn't enough reliable information to know it's safe, so it's best to avoid it and talk with your doctor about other options.
Is it safe to breastfeed while taking Indigo?
No—there's no reliable safety data, so you should avoid it while breastfeeding. Chat with your pharmacist or doctor about alternatives.
What is Indigo Leaf Extract?
It's an extract from the Isatis plant, which has been used in traditional medicine. It's been studied for a few conditions, though human safety data are still limited.
How long can I safely take this?
Indigo has generally been used short-term in traditional medicine, but human safety data are limited. Because we don't have much data on long-term use, check with your pharmacist on how long is safe for you.

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

Not sure if Indigo is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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.

Indigo label
Go deeper

The Full Monographs Behind Indigo’s Ingredients

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

Herb & supplement monograph

Isatis

Isatis is a plant long used in traditional Chinese medicine, mainly for sore throats, fevers, and colds. Modern evidence in people is very limited, so its benefits are not well proven. Talk...

Read the full Isatis monograph →
Sources

Sources & How We Checked

Indigo'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 3 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.

Isatis 3 references
  1. Herbs at a Glance — NIH NCCIH Source
  2. Herbs and Supplements — MedlinePlus Source
  3. About Herbs, Botanicals & Other Products — Memorial Sloan Kettering Cancer Center Source

See these in context on the Isatis 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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