450 degree heat protection
Heat protection is a performance claim; an ingredient list cannot confirm it.
—
Stated by brand
Only lab testing can show this.
Mielle
Avocado Tamanu Anti-Frizz Stay Straight Serum
Finisher / Serum, glossing
- Finisher
- serum
- oil
- Sulfate-free
- Silicone-free
- Protein-free
Size6 fl oz
Price$9 Good valueseen at one store · 6 oz
Price / oz$1.50/ozat 6 oz
Where to buy2 stores · $7.79–9.00
Scent:
The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.
Manufacturer page: mielleorganics.com
Personal fit
Is this right for you?
Complete the consultation to see exactly how well this product fits your hair and your goals. With 2,400+ products in our library we can match exactly the right products to you.
- In 10 minutes we can identify your exact hair condition and traits.
- Every product matched against your hair across the 22 factors we check.
- A personalized routine for your daily life — your schedule, styling habits, and local weather.
- Find products that do the same job at a lower cost.
- Your goals, scalp, damage history, water, budget, and scent preferences all shape your plan.
$49.00 one-time consultation, no subscription
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Factor
Your profile
Fit
Best for hair types
Curly–Coily
Not in your profile
Moisture level
Moderate
Not in your profile
Shine system
High
Not in your profile
Slip / detangling
Some
Not in your profile
Weight on hair
Rich
Not in your profile
Fragrance
Prominent
Not in your profile
Protein
None
Not in your profile
Silicone / wax buildup
None
Not in your profile
Clarifying wash needed
Low
Not in your profile
Parabens / preservatives
None of these listed
Not in your profile
Show all 22 factors we check
The rest of what your plan weighs on this product.
Essential oils
None listed
Not in your profile
Fast-drying alcohol
None
Not in your profile
Vegan / cruelty-free
Not yet verified
Not in your profile
Animal-derived ingredients
Not yet verified
Not in your profile
Aerosol can
Pump or tube
Not in your profile
Needs heat to set
Not determined
Not in your profile
Heavy humectants
Not heavy
Not in your profile
Hard-water defence
None
Not in your profile
UV filter
None listed
Not in your profile
Ingredient list
7 ingredientsA short list
Not in your profile
Price tier
Drugstore
Not in your profile
Where to buy it
Brand website · Grocery / mass
Not in your profile
The consultation builds your hair profile, then reads every factor in this table against it — and tells you where this product fits, or what to use instead.
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Your avoid-list
Lower cost than most serums
$1.50/oz at 6 oz — less than 97% of the 77 serums , which mostly run $3.25–14.50/oz.
Great for
Protein-sensitive hairthat stiffens when protein is added
Coarse or dry hairthat absorbs everything you give it
Silicone-free routinesno silicones appear in the list
Stretching wash daysnothing here needs a detergent to remove
Dull-looking haira recognised shine system is present
Very dry hairno fast-drying alcohol in the list
Maybe skip if
this product carries a scent
Oily scalp or fine hairthat gets weighed down
Frizz in humid airno film former or silicone to hold it back
What the formula actually does
Read from the label, not the marketing
Each row says where it comes from: F means we derived it from this product’s own ingredient list, S means it is a claim the brand makes that the formula neither confirms nor contradicts.
Shine system
Oil blend
A silicone or oil blend does the shine work here.
Weight on the hair
Rich
Heavy butters and waxes in the first eight ingredients.
Oils and butters
Present, high in the list
Oils sit high in the list — a softening, coating formula.
Needs detergent to remove
No
Nothing here needs a detergent wash to remove.
Fast-drying alcohol
None
No fast-drying alcohol in the list.
Fragrance
Prominent
Fragrance sits in the first eight ingredients — a larger share of the formula.
from the formula
stated by the brand
reported by reviewers
Scale: 1 dot low · 5 dots high, within this product type.
Ingredients that matter
The ingredients that change a decision
The workhorse ingredients plus anything lower down that changes a decision. These chips name what an ingredient does — they are not safety scores, and no ingredient here is rated good or bad on its own.
| Ingredient | What it does | Why it matters | Chip |
|---|---|---|---|
| Prunus Amygdalus Dulcis (Sweet Almond) Oil | oil | The shine and softening system | Shine |
| Ricinus Communis (Castor) Seed Oil | oil | The shine and softening system | Shine |
| C13-15 Alkane | emollient | Softens and smooths the strand | Shine |
| FragranceFragrance (Parfum) | fragrance | The scent | Fragrance |
| Acetyl Ethylhexyl Polyhydroxystearate | light ester | A light, silky feel | Shine |
| Persea Gratissima (Avocado) Oil | oil | A little oil for shine | Shine |
| Calophyllum Inophyllum (Tamanu) Seed Oil | oil | A little oil for shine | Shine |
What the list leaves out, and what it carriesThe list carries no sulfates, silicones, or drying alcohols. No protein — a moisture formula, not a repair one. Fragrance is on the label. Heavier butters sit in the working part of the list.
Full ingredient list (7)
US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.
-
1
Prunus Amygdalus Dulcis (Sweet Almond) Oil
General function
A medium-weight oil used for softness and slip.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
May suitDry, coarse, or high-porosity hairCoats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.
May suitFrizz-prone, damaged, or high-friction hairA thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.
May not suitFine or easily flattened hairNear the top of a list an oil is weight before it is anything else, and fine hair shows that first at the roots.
- oil
- emollient
-
2
Ricinus Communis (Castor) Seed Oil
General function
A thick, tacky oil used for sealing ends and for slick, held-down styles.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
May suitDry, coarse, or high-porosity hairCoats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.
May suitFrizz-prone, damaged, or high-friction hairA thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.
May not suitFine or easily flattened hairNear the top of a list an oil is weight before it is anything else, and fine hair shows that first at the roots.
- oil
- emollient
-
3
C13-15 Alkane
General function
A plant-derived light alkane used as a clean-feeling replacement for silicone or mineral oil.
Leading ingredientListed in the first three ingredients, it is likely a structural part of this formula.
May suitFrizz-prone, damaged, or high-friction hairEmollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
- emollient
- solvent
- ▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
-
4
Fragrance
· Fragrance (Parfum)
General function
An undisclosed blend of scent ingredients. Regulations let it stay unlisted, so a fragrance-free product is the only way to be certain what is not in it.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May not suitFragrance-sensitive routinesDeclared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
- declared fragrance
-
5
Acetyl Ethylhexyl Polyhydroxystearate
General function
A fatty ester. Esters give slip and a smooth after-feel; lighter ones read dry and silky, heavier ones read rich.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
- light ester
- emollient
-
6
Persea Gratissima (Avocado) Oil
General function
A rich oil used in masks and heavier creams for softness on coarse or dry hair.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May suitDry, coarse, or high-porosity hairCoats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.
May suitFrizz-prone, damaged, or high-friction hairA thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.
- oil
- emollient
-
7
Calophyllum Inophyllum (Tamanu) Seed Oil
General function
Tamanu oil, a thick oil used in small amounts in scalp and repair products.
Estimated lower-concentration zoneIt appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
May suitDry, coarse, or high-porosity hairCoats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.
May suitFrizz-prone, damaged, or high-friction hairA thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.
- oil
- emollient
What the whole list adds up to
- 6 emollients
- 4 oils
- 1 solvent
- 1 fragrance
- 1 declared fragrance
- 1 light ester
Ingredient list captured 2026-09-04. Formulas change — check the package in your hand when an ingredient matters to you.
Price · 6 oz
Seen at
$9
Good value under
$35
Usually a good value. Most stores sell it under the $35 line, and products that do this job typically go for about $47 at this size.
Show the price ladder
Where we’ve seen it3 listings · 2 stores
-
Mielle Organics (sale from $12.99)
$7.796 oz · $1.30/ozSep 4Lowest per oz
-
Mielle Organics (sale from $12.99)
$7.796 oz · $1.30/ozSep 4
-
Youfromme
$9.006 oz · $1.50/ozSep 4Sale · was $13.99
Sorted by price per ounce. Dated observations from our research, not live prices. Direct store pages, no affiliate links. We don’t sell this product. and 1 listing we don’t count — grey-market or unverified sellers.
How we work this out
- 6 oz is the size stores list most often; every comparison on this page is made at it. Other sizes are shown in the Sizes row and the store list.
- Seen at $9 is the price we have observed for the 6 oz. We need three stores before we call a price commonly seen.
- Good value under $35 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $5.92/oz; at 6 oz that is $35. Under that line you are paying less than most of them.
- About $47 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 6 oz.
Formula
6
Formula score
6 of 10
Not the most complete serum formula we have read, but it is under most of the range for serums per ounce.
How the score is counted
- Costs less per ounce than 97% of the 77 serums we’ve priced
- No weightless carrier in the formula
- Drugstore tier, sold at Brand website and Grocery / mass
- Drugstore tier
- A shine systemThe silicone, oil, or ester that produces gloss.3 pts
- A weightless carrierDelivers the shine without leaving grease.2 pts
- Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
- An antioxidantKeeps the oils in the bottle from going off.1 pt
- No drying alcohol in the first threeFast drying without leading on alcohol.1 pt
- Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt
The formula score is completeness for the job: the share of the systems this product type is normally built around that we can find in this list, weighted. It is not efficacy, not quality, and it never compares across product types.
Does the same job
Same derived functions — what it cleans, conditions, coats or holds — at a lower cost per ounce. Scent, texture and where you buy it can still differ.
Camille RoseSame function
Rosemary Oil Strengthening Hair Drops
$6.76/oz $5.26/oz more
- Fragrance-free
- Protein-free
- Rich
- Differs
Mielle OrganicsLowest cost per oz
Mint Almond Oil
$1.31/oz $0.19/oz less
- Fragrance-free
- Protein-free
- Rich
- Differs
Qhemet BiologicsSame function
Castor & Moringa Softening Serum
$8.65/oz $7.15/oz more
- Fragrance-free
- Protein-free
- Rich
- Differs
See more alternatives in the product library
These are functional neighbours, not personal recommendations — they are close on formula, not chosen for anyone. Get the one that fits your hair, routine, and budget
Final decision
Should you buy it?
A solid pick for the hair it suitsBest user
Hair that stiffens on protein, looking for a protein-free formula and a formula with real substance
Biggest tradeoff
Worth skipping for anyone sensitive to fragrance, oily scalps and fine hair, or frizz on humid days
Best alternative if not
Nothing in our library matches it closely at a lower price.
We do not sell products or take placement fees. This page states what the formula and the prices show; the consultation is what matches it to a person.
Claims check
What the brand says, against what the formula shows
Claims are quoted from the brand. We only mark one supported, partly supported, or conflicting when the ingredient list actually speaks to it; everything else stays "stated by the brand", which is not a criticism — most claims simply cannot be read off a label.
2
SupportedBacked by ingredients
1
Partly supportedSome supporting logic
2
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Reduces frizz, seals hair and adds shine
Oils and polymers can smooth a little; the stronger smoothing agents are not listed.
- Prunus Amygdalus Dulcis (Sweet Almond) Oil
- Ricinus Communis (Castor) Seed Oil
- Persea Gratissima (Avocado) Oil
Partly supported
Some smoothing, in dry air.
Cold Application Technology™ closes hair cuticles
This is a marketing claim; an ingredient list cannot speak to it.
—
Stated by brand
Can’t be confirmed from label.
Silicone-free formula
No silicones appear in the ingredient list.
—
Supported
Nothing that needs a strong wash.
Color-safe and child-safe
It avoids sulfate detergents, which are the usual cause of fast fade.
—
Supported
Less fade per wash.
How to read this
We look at the first 10–15 ingredients and what they do in a formula — not marketing. If the list doesn't speak to a claim, we don't assume.
Reviewers
What people report
Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings.
Effectively reduces frizz and helps maintain straight styles
Lightweight formula adds shine without weighing down hair
May not work well for low porosity or type 4 hair
More from Mielle
How this page was made
- Everything above is generated from our researched product record — identity, the ingredient list as printed, the brand's own claims, dated price observations, and review themes written in our researchers' own words. No part of this page is written per product.
- The value band is a fixed label over two stored numbers: this product’s cost per ounce as a percentile of every product of this type we have priced, each at the size it is most often sold in, and how many products we score as doing the same job cost at least a quarter less per ounce.
- Both scores out of ten are defined on this page. The formula score is completeness for the job, computed from a fixed per-format checklist shown beneath the gauge; the price score is cost per ounce against every product of this type we have priced.
- The "Is this right for you?" panel reads only your own consultation answers, and it applies exactly the filters our recommendation engine applies. It is computed when you load the page and is never stored on it.
- 3 sources consulted for this product (0 manufacturer or regulatory, 1 retailer, 2 editorial), last checked 2026-09-04.
- Ingredient references are linked for 0 of 6 product-aware annotations on this page. Fit notes are conditional formulation guidance, not a conclusion about the finished product or about you.
- We have not tested this product in a lab and we do not physically test your hair. Formula readings come from the ingredient list; behaviour claims are labelled as the brand's.
- Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice.
- Ingredient names link to our ingredient library, where each entry shows what it does, which product types use it, and where it usually sits on a label across everything we have researched.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Formula readings: derivation v22. Record last updated 2026-09-04.