Is E1105 (Lysozyme) Halal?
Doubtful — depends on source
E1105 (Lysozyme) is an enzyme usually extracted from egg white; it is generally halal if the egg is acceptable, but is treated as doubtful because the source and any processing aids are seldom stated.
What is E1105?
Lysozyme is an enzyme, obtained mainly from hen egg white, used as a preservative — notably to prevent late blowing (gas defects) in some hard cheeses. It is also an allergen concern for those avoiding egg.
Extracted and purified from egg white. Processing aids may be used during purification.
Why is it doubtful (mushbooh)?
Lysozyme from egg white is generally acceptable to most scholars, since eggs are halal — so the enzyme itself is usually treated as permissible. It is presented as doubtful because the source and any processing aids are seldom stated, and some prefer to verify. It is also important information for anyone with an egg allergy.
Commonly found in
It may be found in — this does not mean every product below contains it.
- Hard and semi-hard cheeses (e.g. some Grana/Edam-type)
- Some beverages
- Occasionally other preserved foods
How it appears on labels
LysozymeE1105Preservative (E1105)INS number: 1105
How to verify a product in Singapore
- Ingredient-level guidance is not halal certification — check the complete product, not just this ingredient.
- Look for recognised halal certification, and check the finished product on the official MUIS HalalSG register.
- When the source or processing aids are unclear, contact the manufacturer.
In Singapore, verify the finished product on the MUIS HalalSG register or contact the manufacturer if you need to confirm the source and processing.
Check MUIS HalalSGSources: EFSA, FAO/WHO, MUIS · Last reviewed: July 2026 · This guidance is not certification.
Frequently asked questions
Is E1105 (lysozyme) halal?
It is usually from egg white, which most scholars accept, so it is generally treated as permissible. It is presented as doubtful because the source and processing aids are seldom stated — verify if you need certainty.
Is lysozyme from eggs?
Yes, food lysozyme is usually extracted from hen egg white — which also makes it relevant for those with an egg allergy.
What names should I look for?
'Lysozyme' or 'E1105'.
Related ingredients
Sources & methodology
- Lysozyme (E 1105) — food additive information — European Food Safety Authority (EFSA) · Egg-white origin and use in cheese
- General Standard for Food Additives (GSFA) Online Database — Codex Alimentarius (FAO/WHO) · Approved uses and INS number
- Halal Certification — HalalSG — Majlis Ugama Islam Singapura (MUIS) · Singapore halal verification process
Humble Halal methodology: we classify additives by their common origin, not by any specific product. A generally-halal ingredient does not make a finished product halal-certified. This page is general guidance, not certification or religious/legal advice — always verify the complete product. Last reviewed July 2026.