Is Isinglass halal?
Isinglass is classified uncertain for halal use with Medium confidence. A collagen-like protein from fish swim bladders used to clarify some liquids. Fish-derived; generally more acceptable than porcine but still requires disclosure.
Clarifying agent · Confidence: Medium
Also known as: fish swim bladder protein, fish gelatin
Uncertain Ask pharmacist
What it is
A collagen-like protein from fish swim bladders used to clarify some liquids.
Source:DailyMed
Why it's here
Occasionally used in traditional or compounded liquid preparations.
See:DailyMed
Why it may matter
Fish-derived; generally more acceptable than porcine but still requires disclosure.
Source:DailyMed
Common sources
- Sturgeon
- Other fish swim bladders
Questions to ask
- Is isinglass present, and which fish species was used?
Reason codes
fishDerived
Evidence & citations1
AuditCommon questions
- Is Isinglass halal?
- RxHalal currently classifies Isinglass as UNCERTAIN (Medium confidence). Fish-derived; generally more acceptable than porcine but still requires disclosure. This is information only — not a fatwa or medical advice.
- What is Isinglass used for in medicines?
- A collagen-like protein from fish swim bladders used to clarify some liquids. Occasionally used in traditional or compounded liquid preparations.
- What are common sources of Isinglass?
- Common sources include: Sturgeon; Other fish swim bladders. Manufacturers often do not disclose which source is used.
- Is isinglass present, and which fish species was used?
- Ask your pharmacist or prescriber. RxHalal lists this because Isinglass is uncertain in our cited database.
Smallest set of questions to ask
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