What is the black stuff floating in my apple cider vinegar?

Author: Melissa Powlowski  |  Last update: Wednesday, January 28, 2026

“It's a little bit of sediment from the apples themselves, and it's also vinegar mother,” which is a natural by-product of the fermentation process. “The vinegar mother grows over time, and that's usually the swirly stuff that people see at the bottom of the bottle.”

What is the stuff floating in my apple cider vinegar?

Have you ever wondered what the floaters are in your apple cider vinegar? In short - it is GOOD FOR YOU! All that gunk is microorganisms, like bacteria and fungi, called the 'mother'. You can actually see it listed on the label sometimes. This is my favorite ACV (https://amzn.to/3twAh4X).

Is it safe to drink apple cider that has fermented?

Yes it's safe. It won't taste ideal though as it's probably not carbed well, not sweet, and full of bitter tasting yeast rafts.

What is the black string in apple cider vinegar?

The mother contains the byproducts of fermentation. It looks like blobs or strings floating in apple cider vinegar. Raw, unfiltered organic apple cider vinegar will still contain the mother. It contains trace minerals, antioxidants and other bioactive compounds.

Can bacteria grow in apple cider vinegar?

The present results showed that bacterial diversity was rich and exhibited a certain variation during the dynamic fermentation process of apple vinegar.

Debunking the health myths surrounding apple cider vinegar

What is the black stuff in apple cider vinegar?

“It's a little bit of sediment from the apples themselves, and it's also vinegar mother,” which is a natural by-product of the fermentation process. “The vinegar mother grows over time, and that's usually the swirly stuff that people see at the bottom of the bottle.”

How do you know if apple cider vinegar has gone bad?

The Bottom Line

By nature, apple cider vinegar is self-preserving and should never go bad.

What is floating in my cider?

Film yeast form during aging when oxygen is present.

That is because the fermenting aging process has cleaved the pectin from the cider and the ethanol is forcing it to flocculate. This forms the masses that seems to float around like a creature from science fiction movie.

What is the stuff growing in my apple cider vinegar?

A thick, gelatinous layer is formed by the acetic acid bacteria on the surface of the vinegar. This layer is known as 'The Mother' because it is the catalyst that gives rise to the vinegar.

What is the sediment in apple cider?

After fermentation, the sediment is often called lees and, lees are usually categorized as gross or fine. Gross lees is the sediment formed once fermentation completes. It includes higher levels of apple solids. Fine lees is the sediment formed after a cider has already been racked at least once.

Should apple cider be refrigerated?

However, to maintain the best quality, freeze it for eight to twelve months. Once you thaw the apple cider, make sure it's refrigerated.

Is Braggs apple cider vinegar fermented?

It's a dark and cloudy substance formed naturally during the Bragg vinegar fermentation process from pectin and apple residues. The mother is made up of strand-like protein chains, enzymes, and friendly bacteria which explains its popularity as an aid to digestion.

How to tell if apple cider is fermented?

Apple Cider may not taste as good after it begins to “turn”. It will become darker in color and start to froth. When those things start to occur, it just means the cider is undergoing fermentation. It will taste more sour like vinegar, but it's by no means harmful.

What is the weird stuff floating in my vinegar?

When you find a bit of stringy sediment, large or small, in a bottle of vinegar don't fret. In fact — congratulations — you have a mother. A mother of vinegar, that is. Yes, it looks rather grungy and scary, floating on the top of the vinegar like that, but this spongy mass of bacteria is completely harmless.

What does mold look like in cider?

You might find mold growing on the surface of your fermenter or the top of you cider, as part of a yeast and pectin cap or brew bag floating on the surface of your cider. Also, mold is colorful while yeast is white or colorless (1). That blue, green, yellow, or black fuzzy stuff is mold.

What is the sediment floating in my vinegar?

Once opened and exposed to air, however, harmless “vinegar bacteria” may start to grow. This bacteria causes the formation of a cloudy sediment that is nothing more than harmless cellulose, a complex carbohydrate that does not affect the quality of the vinegar or its flavor.

What are the black bits in apple cider vinegar?

Filtered ACV tends to be lighter in colour and doesn't contain any bits, whereas unfiltered ACV is darker in colour and will contain some floating 'strands'. These 'stands' are what is known as 'The Mother' and they are what brings ACV most of its benefits.

Can I drink apple cider vinegar every day to lose weight?

Apple cider vinegar isn't likely to be effective for weight loss. Proponents of apple cider vinegar claim that it has numerous health benefits and that drinking a small amount or taking a supplement before meals helps curb appetite and burn fat. However, there's little scientific support for these claims.

Is it normal for stuff to be in apple cider vinegar?

Apple cider vinegar with 'the mother'

Most ACV you find in the grocery store is the clear, pasteurized, and filtered type. But you can also buy raw, unfiltered ACV that contains a cloudy sediment. Called "the mother," this substance is made up of settled bacteria and yeast.

What are the chunks in my apple cider?

Microbial hazes are often caused by spoilage yeasts or heavy infestations of bacteria, including a slow-growing yeast that forms clumps in unsweetened cider at the bottom of its bottles. Though it doesn't affect the flavour much, microbial problems should be avoided.

What is the mother in apple cider vinegar?

What is 'the mother'? ACV comes in two types, with the 'mother' and without. In simple terms, apple cider vinegar with the mother just means that it contains the good bacteria created during the fermenting process. ACV without the mother has this bacteria filtered out.

What is the slimy blob in apple cider vinegar?

The mother of vinegar might look like a grape mistake, but it's the real yeast of your worries. So go ahead, embrace the blob – it's brew-tifully natural!

When should I throw out apple cider vinegar?

Does Apple Cider Vinegar Expire? While the acidic properties of apple cider vinegar keep it from ever truly going bad, you'll still find an FDA-required expiration date on the bottle—usually between 2 and 5 years. Once opened and exposed to air, the flavor and look of vinegar will slowly begin to change.

What does the mother in vinegar look like?

A vinegar mother is a gelatinous disc that looks like a slice of wobbly raw liver.

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