Colour
Is E101 (Riboflavin) halal?
A yellow vitamin colour. Commercial riboflavin is usually fermentation-produced, but animal-tissue sourcing exists, which is why certifier tables keep it conditional.
Synthetic and plant-fermented riboflavin is halal; the doubtful cases are animal-tissue extraction (pork liver and kidney are documented sources) and gelatine-coated supplement forms.
What we know
Named sources are on this page. Classification: Source-dependent.
What we don’t know
The pack in your hand does not, by itself, name the raw material or process.
Why it matters
Doubtful until the source is known (mashbooh)
What to verify
For E101 in this product: is the source plant, synthetic, or animal? If animal, which species and slaughter method?
The detail
Most commercial riboflavin is produced by microbial fermentation or chemical synthesis, both of which are halal routes. The conditional listing survives because riboflavin can also be extracted from animal tissue — MuslimConsumerGroup names pork liver and kidney as haram sources and 100% plant material as halal. Halal Authority India carries the same conditional listing. In supplements, the additional question is the tablet coating or capsule shell rather than the vitamin itself.
What the sources say
Mushbooh (Haraam if from pork liver & Kidney, Halal if 100% plant material
Mushbooh (Haraam if from pork liver & Kidney, Halal if 100% plant material
Where you will run into it
- Fortified cereals
- Energy drinks
- Vitamin supplements
- Processed cheese colouring
- Baby formula
How to check it yourself
In fortified foods the fermentation route dominates and mainstream certifiers accept it. In a supplement, check the capsule shell and coating first — that is where gelatine or stearate enters, not the riboflavin.
What to ask the manufacturer
A recognised halal mark or a vegan declaration can settle this instead. If you email the brand, send one specific question:
For E101 in this product: is the source plant, synthetic, or animal? If animal, which species and slaughter method?
Other ingredients — the bottle audit
Pharmacists do not certify a brand from the front of the tub. They read the shell, the lubricant, the carrier and the colour. Each line is a catalogue row. This is not a product certificate.
- Capsule shell. Gelatin, HPMC (hypromellose) or pullulan. Bare gelatin follows the capsule row — it is not the powder. Gelatin capsules · HPMC · Pullulan
- Glycerin / glycerol. Softgels and liquid drops. Plant or synthetic settles it; animal fat does not. The bottle rarely says which. E422 glycerol
- Magnesium stearate. The lubricant in most tablets. Vegetable or synthetic vs animal including porcine. A vegetarian capsule does not settle the powder inside. E572 magnesium stearate
- Flavourings. Natural flavour can hide an ethanol carrier. Vanilla extract is a different, disputed row. Natural flavours · Vanilla extract
- Colour. Carmine / cochineal (E120) is insect. Plant colours are a different page. Natural colour is not a plant guarantee. E120 carmine
Creatine powder is a different question from a creatine capsule. D3 wants lanolin vs lichen. Collagen wants a species.
Quick facts
| E-number | E101 |
|---|---|
| Name | Riboflavin (vitamin B2) |
| Also on labels as | riboflavin, vitamin b2, lactoflavin, E101(i), E101(ii), E101i |
| Additive class | Colour |
| Classification | Source-dependent |
| Source last accessed | 2026-08-21 |
Common questions
Is E101 (Riboflavin) halal?
Riboflavin (vitamin B2) is classified as Source-dependent. Synthetic and plant-fermented riboflavin is halal; the doubtful cases are animal-tissue extraction (pork liver and kidney are documented sources) and gelatine-coated supplement forms.
Is Riboflavin halal or haram?
On the evidence cited on this page, Riboflavin is source-dependent. Doubtful until the source is known (mashbooh) Every position is attributed to a named certifier or scholarly body with a link, so you can verify it directly.
What else is Riboflavin called on ingredient labels?
It can appear as: riboflavin, vitamin b2, lactoflavin, E101(i), E101(ii), E101i.
Why isn't there a single yes/no answer for E101?
Because the ruling depends on information the label does not carry — the source material, the production route, or which scholarly position you follow. This page shows each named position with a link so you can check it yourself.
Where does this page's information come from?
Every position on this page is attributed to a named certifier or scholarly body with a direct link, listed under 'What the sources say'. Muttoo aggregates and cites; it does not issue rulings.
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