PRESERVATIVE
Leuconostoc/Radish Root Ferment Filtrate
- preservative
A fermentation-derived preservative used in "preservative-free" positioned formulas.
- products in our library
- 281
- of researched products
- 4%
- on the label, in our conditioners
- usually #25
- most common in
- Conditioner
- in water
- Water-soluble
At a glance
Four things worth knowing about how this ingredient behaves on hair.
How much of it is left on hair between washes.
What it takes to get it off the hair again.
What it is in the formula to protect.
Where it sits on the labels we have, in the category it appears in most.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Low | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Role | Keeps water-based formulas | 4 of 5 |
| Prominence | Secondary | 2 of 5 |
What it does for a formula
What Leuconostoc/Radish Root Ferment Filtrate does
The general function first, then how the role changes by product type where we have researched it.
Anything with water in it needs one, over the life of the bottle.
Water alone removes it, so it does not accumulate between washes.
Charge
Charge is not recorded for this ingredient.
Solubility
Rinses out with water alone, so it does not build up on hair between washes.
Where it appears
Where it appears
One row per product category in our library: how many products list it, what share of that category that is, and where it typically sits on the label.
| Product type | How common | Typical position on label ? |
|---|---|---|
Conditioner
61 products
|
secondary · #25 | |
Shampoo
57 products
|
secondary · #24 | |
Leave-in
33 products
|
secondary · #22 | |
Mask / treatment
30 products
|
secondary · #27 | |
Styler: curl cream
14 products
|
secondary · #31 | |
Heat protectant
13 products
|
secondary · #16 | |
Scalp treatment
13 products
|
secondary · #24 | |
Styler: gel
11 products
|
secondary · #20 | |
Styler: volumizer
9 products
|
secondary · #17 | |
Styler: mousse
8 products
|
secondary · #19 |
12 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Finisher: serum
5 products
|
secondary · #28 | |
Finisher: oil
4 products
|
secondary · #19 | |
Styler: texture spray
4 products
|
secondary · #17 | |
Finisher: shine spray
3 products
|
secondary · #24 | |
Styler: hairspray
3 products
|
secondary · #25 | |
Styler: paste
3 products
|
secondary · #17 | |
Styler: smoothing cream
3 products
|
secondary · #26 | |
Dry shampoo
2 products
|
secondary · #15 | |
Styler: refresh spray
2 products
|
secondary · #17 | |
Co-wash
1 product
|
secondary · #31 | |
Finisher: anti frizz finish
1 product
|
secondary · #53 | |
Finisher: end oil
1 product
|
secondary · #31 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Conditioner | 61 | 5% | 25 | 11 | secondary |
| Shampoo | 57 | 4% | 24 | 9 | secondary |
| Leave-in | 33 | 5% | 22 | 8 | secondary |
| Mask / treatment | 30 | 5% | 27 | 6 | secondary |
| Styler: curl cream | 14 | 6% | 31 | 10 | secondary |
| Heat protectant | 13 | 6% | 16 | 4 | secondary |
| Scalp treatment | 13 | 4% | 24 | 14 | secondary |
| Styler: gel | 11 | 4% | 20 | 9 | secondary |
| Styler: volumizer | 9 | 6% | 17 | 6 | secondary |
| Styler: mousse | 8 | 4% | 19 | 11 | secondary |
| Finisher: serum | 5 | 4% | 28 | 12 | secondary |
| Finisher: oil | 4 | 1% | 19 | 16 | secondary |
| Styler: texture spray | 4 | 4% | 17 | 12 | secondary |
| Finisher: shine spray | 3 | 3% | 24 | 12 | secondary |
| Styler: hairspray | 3 | 1% | 25 | 14 | secondary |
| Styler: paste | 3 | 2% | 17 | 14 | secondary |
| Styler: smoothing cream | 3 | 4% | 26 | 23 | secondary |
| Dry shampoo | 2 | 2% | 15 | 10 | secondary |
| Styler: refresh spray | 2 | 6% | 17 | 17 | secondary |
| Co-wash | 1 | 1% | 31 | 31 | secondary |
| Finisher: anti frizz finish | 1 | 3% | 53 | 53 | secondary |
| Finisher: end oil | 1 | 13% | 31 | 31 | secondary |
We have not researched differences by product type yet. The reading below comes from where it sits on the labels in our library.
Position footprint
Every listing in our library, by position on the label.
| Positions | Zone | Listings |
|---|---|---|
| 1-3 | Leading | 0 |
| 4-8 | Supporting | 8 |
| 9-15 | Secondary | 48 |
| 16-25 | Lower | 105 |
| 26+ | Trace | 120 |
How to read this
US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order.
So position tells you about relative amount only above that line, and we never convert a position into a percentage.
Why it matters to shoppers
What seeing this ingredient tells you, what it does not, and the limits of our own method.
- a product that keeps over its shelf life
- a rinse-clean feel
- an exact safety score (we do not publish one for any ingredient)
- how a finished product performs, which depends on the whole formula, not one line of it
- the exact percentage in a bottle, because label position never converts into a number
- a secondary preservative, listed below the main ingredients in our conditioners
- it was on the printed ingredient list of every product we counted (we read labels, not marketing copy)
- that the product would be better without one
- that a product is right or wrong for you
We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
Commonly paired with
The ingredients that most often appear alongside this one in our library. We leave out the near-universal ones, because they pair with everything and tell you nothing.
- Ethylhexylglycerin · 148
- Tocopherol · 125
- Benzyl Alcohol · 114
- Guar Hydroxypropyltrimonium Chloride · 100
- Cetrimonium Chloride · 91
- Caprylyl Glycol · 90
- Behentrimonium Chloride · 88
- Sodium Hydroxide · 80
- Propanediol · 77
- Hexyl Cinnamal · 72
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to soften the strand, deliver a stated effect, and carry the formula and let it dry.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
CÉCRED · Heat protectant
Thermal Shield Mist
#4 on the label · $6.00/oz
Curlsmith · Heat protectant
Miracle Shield
#6 on the label · $3.50/oz
JVN · Mask / treatment
Revive Rapid Repair Bond Gloss
#6 on the label · $6.00/oz
Paul Mitchell · Styler
MITCH Calibrate Thickening Cream
#6 on the label · $8.00/oz
Drybar · Styler
Big Swig Thickening Spray
#7 on the label · $6.00/oz
Hask · Mask / treatment
Repair + Argan Oil Deep Conditioner Packet
#7 on the label · $5.66/oz
Hask · Mask / treatment
Smooth + Keratin & Jojoba Oil Deep Conditioner Packet
#8 on the label · $1.14/oz
OGX · Leave-in
Nourishing + Coconut Milk Anti-Breakage Serum Leave-In Hair Treatment
#8 on the label · $2.00/oz
Hask · Mask / treatment
Soothe + Tea Tree Oil & Rosemary Hair & Scalp Deep Conditioner
#9 on the label · $1.58/oz
L'anza · Shampoo
Scalp Therapy Balancing Shampoo
#9 on the label · $1.73/oz
Maria Nila · Mask / treatment
Bond Builder
#9 on the label · $8.82/oz
Not Your Mother's · Styler
Curl Talk Defining Spray Gel Strong Hold
#9 on the label · $1.82/oz
See all 281 products in the library that list Leuconostoc/Radish Root Ferment Filtrate
Identity
What this entry is, and what our references call it.
No public-domain structure depiction is available for this entry.
Leuconostoc/Radish Root Ferment Filtrate
- leuconostoc ferment filtrate
- leuconostoc/radish root ferment filtrate
For your hair?
Whether Leuconostoc/Radish Root Ferment Filtrate matters for your hair depends on your hair.
281 products in our library list itWhat this ingredient does, and where it sits on the labels we have researched.
A verdict on any product that contains it, and never a safety grade.
We do not physically test your hair. Everything above comes from the ingredient lists in our library and from published references. The consultation is what turns it into a plan.
References
Seed entry, sourcing in progress Written from our reference work; primary sourcing is still being attached.
No published source is attached to this entry yet.
How this page was made
- Every number above is counted from the ingredient lists in our own product library: 281 of 6816 researched products list this ingredient. Nothing on this page is written per ingredient.
- The dots are levels, not scores. Each one comes from what kind of ingredient it is (its chemical class, charge and solubility) or from where it sits on the labels we have.
- US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Position tells you about relative amount only above that line, and we never convert a position into a percentage.
- The prominence bands (leading, supporting, secondary) are the same ones the product pages use to read a single label, applied here to the median position across a category.
- We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
- Identifiers and references appear only when a published source is attached to this entry. Without one, we leave the row out rather than fill it in.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Entry last updated 2026-09-22. Product-page methodology: the product library.
