John Frieda Blonde+ Repair System Shampoo — front of package

Sizes & containers

Photo coming8.45 fl oz (250 ml)Photo coming5.07 fl oz (150 ml)

8.45 fl oz (250 ml) · No store price at this size yet

John Frieda

Blonde+ Repair System Shampoo

Shampoo / Clarifying, deep-cleaning

Shampoo
Protein-free
Moisture-rich
Lightweight
Vegan · label states
Cruelty-free · PETA-listed

Size8.45 fl oz (250 ml)usual store size · 2 sizes

Price$12.76seen at one store · 5.07 oz

Where to buy1 store

Add it to your products. We’ll tell you if it’s ever recalled.

Scent:

Notes: bergamot, dreamwood, grapefruit, lemon.

“Bright and uplifting, citrusy notes of bergamot, lemon, and grapefruit flow into Dreamwood for a scent that glows like golden hour.” (Brand page)

Manufacturer page: cloud10beauty.com

Personal fit

Is this right for you?

Factor Your profile Fit

Best for hair types All types Not in your profile

Moisture level Moderate Not in your profile

Cleansing strength Strong Not in your profile

Slip / detangling Moderate Not in your profile

Weight on hair Light Not in your profile

Fragrance Prominent Not in your profile

Protein None Not in your profile

Silicone / wax buildup Low Not in your profile

Clarifying wash needed Low Not in your profile

Scent CitrusStrength not recorded Not in your profile

Show all 23 factors we check

The rest of what your plan weighs on this product.

Sulfates Sulfate detergent Not in your profile

Parabens / preservatives None of these listed Not in your profile

Essential oils None listed Not in your profile

Fast-drying alcohol None Not in your profile

Vegan / cruelty-free Vegan · label statesCruelty-free · PETA-listed Not in your profile

Animal-derived ingredients Vegan · label states Not in your profile

Heavy humectants Not heavy Not in your profile

Hard-water defence High Not in your profile

UV filter None listed Not in your profile

pH adjusted Adjusted Not in your profile

Ingredient list 27 ingredientsAbout average Not in your profile

Price tier Masstige Not in your profile

Where to buy it Brand websiteOne channel Not in your profile

The consultation builds your hair profile, checks every factor in this table against it, and tells you where this product fits or what to use instead.

Start your consultation

$49 once, with 60 days of follow-up questions and plan updates. Nothing renews, and you never have to buy a product.

Not enough priced shampoos to place it

We have not priced enough shampoos to place this one.

Price and stores

Great for

Protein-sensitive hairthat stiffens when protein is added

Fast-oiling scalpsthat need a real reset wash

Dry, thirsty hairhumectants and emollients both sit up front

Hard waterand swimmers dealing with mineral deposit

Fine hairthat flattens under most products

Very dry hairno fast-drying alcohol in the list

Maybe skip if

this product has a scent

Sulfate-free routinesit uses a sulfate detergent

Dry or damaged haira strong detergent system strips as it cleans

Hair that needs proteinthere is none in this list

Silicone-free routinesit does contain silicones, the water-soluble kind

Picking it up locallywe’ve only seen it sold in one channel

How much cleansing you need depends on how fast your scalp gets oily, how much product you layer and your water. The consultation works that out.

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.

Cleansing strength Strong

A reset wash that removes oil, buildup, and most residue.

Expected lather High

Thick foam that spreads quickly through the hair.

Slip and detangling Moderate

Conditioning agents are present, lower in the list.

Water-binding (humectants) Moderate

Humectants in the working part of the formula.

Scalp active None

No over-the-counter scalp active.

Hard-water defence Chelators present

Contains chelators, which bind hard-water and pool minerals.

Needs detergent to remove Rinses with water

The silicones here are the water-soluble kind.

Protein None

No protein or amino acids in the list.

Fragrance Prominent

Fragrance is in the first eight ingredients, so it makes up 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. The 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
WaterAqua	solvent	The base everything else is dissolved in	Neutral
Sodium Laureth Sulfate	sulfate cleanser	—	Cleanses
Cocamidopropyl Betaine	amphoteric cleanser	—	Cleanses
Coco-Glucoside	nonionic cleanser	—	Cleanses
Sodium Chloride	salt	Thickens the formula	Stabilizes
FragranceParfum	fragrance	The scent	Fragrance
Glycol Distearate	opacifier	Adjusts appearance	Softens
Propanediol	humectant	Adds a little water-binding	Moisturizes
Benzyl Alcohol	preservative	Keeps the product from spoiling	Stabilizes
PEG-12 Dimethicone	emollient	A softening touch, low in the list	Shine
Sodium Benzoate	preservative	Keeps the product from spoiling	Stabilizes
Salicylic Acid	active	A secondary active	Active

What the list leaves out, and what it carriesNo drying alcohols. Protein-free: this is built for moisture rather than for strengthening. Contains fragrance. Chelators for hard water.

Full ingredient list (27)

In the US, ingredients above 1% are listed from most to least. Below 1% they can appear in any order. Each note keeps three things apart: what the ingredient generally does, its role in this type of product, and what its position can tell you.

1 Water · Aqua

General function
The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.
- solvent
2 Sodium Laureth Sulfate

General function
A strong, high-foaming cleanser and the most common shampoo detergent. It removes oil and product efficiently, which can be more than dry or colour-treated hair wants.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.

May suitBuild-up-sensitive routines
A sulfate detergent can lift deposited silicone, wax and styling films, which is what resets a routine before build-up is visible.

May suitFine or easily flattened hair
Fine hair that goes limp under conditioning films usually reads a full detergent wash as volume returning.

May not suitDry, coarse, or high-porosity hair
Coarse and high-porosity hair loses water quickly on its own; an efficient detergent removes the surface oils that were slowing that down.

Indian Journal of Dermatology
- sulfate cleanser
- cleanser
3 Cocamidopropyl Betaine

General function
A mild coconut-derived co-cleanser that boosts foam and softens the effect of stronger detergents. It appears in most shampoos, gentle or not.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.

May suitDry, coarse, or high-porosity hair
Mild cleansing leaves more surface lubrication in place on hair that dries out quickly.

May not suitBuild-up-sensitive routines
The mildest detergents are also the least complete: a routine that deposits films needs something stronger periodically.

DependsVery dry or highly damaged hair
Among the mildest detergents in use — it is what baby shampoos are built on — but it is almost always the second detergent in a formula. How much a wash strips is still decided by the primary detergent listed above it.

Indian Journal of Dermatology
- amphoteric cleanser
- secondary cleanser
- cleanser
4 Coco-Glucoside

General function
A sugar-derived, low-foaming cleanser used in gentle and curly-method shampoos.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

May suitDry, coarse, or high-porosity hair
Mild cleansing leaves more surface lubrication in place on hair that dries out quickly.

May suitVery dry or highly damaged hair
A sugar-derived non-ionic detergent, among the gentlest in use. It cleanses with little foam of its own and little sebum removal.

May not suitBuild-up-sensitive routines
Gentle cleansing leaves water-insoluble deposits largely in place; they come off with a stronger wash, not this one.

PubChem
- nonionic cleanser
- cleanser
5 Sodium Chloride

General function
Table salt. In shampoo it is used to thicken the liquid, not to treat the hair.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChem
- salt
- thickener
▾Below about here, the order stops meaning much. These are usually used at 1% or less.
6 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 zone
It 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 routines
Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
- fragrance
- declared fragrance
7 Glycol Distearate

General function
A wax that gives shampoo its pearly look and a slightly richer feel.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFrizz-prone, damaged, or high-friction hair
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

PubChem
- opacifier
- emollient
8 Propanediol

General function
A corn-derived humectant and solvent, often chosen as a lighter-feeling alternative to propylene glycol.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it adds less weight than oils or butters do.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- humectant
- solvent
9 Benzyl Alcohol
- preservative
- solvent
10 Guar Hydroxypropyltrimonium Chloride

General function
A conditioning polymer made from guar bean gum. It deposits during rinsing, which is why sulfate shampoos can still leave hair soft.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitCurls or waves needing flexible hold
Gums thicken and set soft, which gives definition that bends rather than a rigid cast.

May suitFrizz-prone, damaged, or high-friction hair
Cationic conditioners bind to the negatively charged damaged cuticle, laying it flat and cutting the friction that causes combing breakage.

May suitMaximum-hold styling
A styling polymer dries into a film across the strands, which is what makes a shape hold instead of relax.
- conditioning agent
- polymer
- gum
11 Dicetyldimonium Chloride

General function
A conditioning agent used for slip in thick creams and masks.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFrizz-prone, damaged, or high-friction hair
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

May suitVery dry or highly damaged hair
The class that does the detangling in a conditioner. It deposits lubrication where the cuticle is worn.

DependsBuild-up-sensitive routines
Substantive by design. A routine with no detergent wash gives it nothing to leave with.

PubChem
- conditioning agent
12 Isopentyldiol

General function
A light solvent and humectant used to dissolve extracts and improve feel.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it adds less weight than oils or butters do.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- solvent
- humectant
13 Cetyl Alcohol

General function
A fatty alcohol used to thicken creams and add slip. It softens rather than dries.

Estimated lower-concentration zone
It 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 hair
The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

May suitFrizz-prone, damaged, or high-friction hair
Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

PubChem
- fatty alcohol
- emollient
- thickener
14 PEG-12 Dimethicone

General function
A water-soluble silicone that smooths without the build-up concern of standard silicones.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitBuild-up-sensitive routines
The PEG- and PPG-modified silicones disperse in water, so ordinary washing carries them off instead of leaving a film to accumulate.

May suitClimate-sensitive or frizz-prone hair
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

May suitFrizz-prone, damaged, or high-friction hair
Delivers the slip and surface smoothing of a silicone without needing a detergent wash to remove it afterwards.
- emollient
- silicone
- water-soluble silicone
15 Dimethyl Isosorbide
- solvent
16 Propylene Glycol

General function
A small humectant and solvent that keeps formulas stable and helps active ingredients spread.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it adds less weight than oils or butters do.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

PubChem
- humectant
- solvent
17 Malic Acid

General function
An apple-derived acid used to bring the formula to an acidic pH.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

DependsFrizz-prone, damaged, or high-friction hair
pH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.

PubChem
- pH adjuster
- exfoliant
18 Tetrasodium Glutamate Diacetate

General function
A biodegradable hard-water chelator used in place of EDTA.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitBuild-up-sensitive routines
Binds the calcium and magnesium in hard water, which is what stops mineral deposits accumulating on the strand wash after wash.

May suitGray, silver, or brass-prone hair
Copper and iron carried in tap water deposit on the strand and read as a dull, warm cast on gray or light hair. A chelator holds those metals in solution so the wash carries them off.

PubChem
- hard-water chelator
19 Glycine

General function
The smallest amino acid in hair protein, added for moisture binding.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitVery dry or highly damaged hair
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

DependsProtein-sensitive hair
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

PubChem
- amino acid
20 PPG-9

General function
A light carrier that keeps a formula flexible and helps other ingredients spread.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
Light and water-binding rather than oily, so it adds less weight than oils or butters do.

May suitVery dry or highly damaged hair
A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

DependsClimate-sensitive or frizz-prone hair
A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.
- humectant
- solvent
21 Panthenol

General function
Provitamin B5. It draws in water and penetrates the strand a little, which is why it is the standard ingredient for softness and shine claims.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

May suitFine or easily flattened hair
It hydrates without adding oil or a film, which is the combination fine hair usually needs.

May suitFrizz-prone, damaged, or high-friction hair
Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

May suitVery dry or highly damaged hair
A humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.

PubChem
- humectant
- conditioning agent
- vitamin
22 Sodium Hydroxide

General function
A strong base used in trace amounts to raise pH; fully neutralised in the finished product.

Estimated lower-concentration zone
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

DependsFrizz-prone, damaged, or high-friction hair
The alkali half of a pH-adjusting pair, used in small amounts to bring a formula up to its target rather than to make it alkaline. Alkaline conditions raise the fibre's surface charge and lift the scales — but the finished pH is not on the label.

International Journal of Trichology
- pH adjuster
23 Sodium Benzoate
- preservative
24 Salicylic Acid
- active
- exfoliant
25 Hexyl Cinnamal

General function
A jasmine-like fragrance component named separately as a recognised allergen.

Estimated lower-concentration zone
It 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 routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
26 Limonene

General function
A citrus-smelling fragrance component that EU rules require to be named separately because some people react to it.

Estimated lower-concentration zone
It 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 routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen
27 Linalool

General function
A floral fragrance component listed separately as a recognised contact allergen.

Estimated lower-concentration zone
It 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 routines
One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

PubChem
- fragrance
- named fragrance allergen

What the whole list adds up to

7 solvents
5 humectants
4 fragrances
3 cleansers
3 emollients
3 named fragrance allergens
2 thickeners
2 preservatives
2 conditioning agents
2 pH adjusters
2 exfoliants
1 sulfate cleanser
1 amphoteric cleanser
1 secondary cleanser

Ingredient list captured 2026-09-04. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 5.07 oz

Seen at $12.76 1 store · checked Sep 4

Show the price ladder

Price for 5.07 ozlower is better

Where we’ve seen it1 listing · 1 store

Cloud 10 Beauty (cloud10beauty.com, Ireland)
$12.76

5.07 oz · $2.52/oz

Sep 4Lowest per oz

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.

How we work this out

5.07 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 $12.76 is the price we have observed for the 5.07 oz. We need three stores before we call a price commonly seen.

Formula

Formula score

9 of 10

We do not have enough shampoos with a computable price per ounce to say where this one sits. The formula itself carries the systems a shampoo is built around.

How the score is counted

Covers 6 of the 7 things a shampoo should do
Reviewers mention 2 things they like about how it performs
Reviewers mention 2 recurring complaints
Masstige tier, sold at Brand website

A working detergent systemWhat actually removes oil and product.3 pts
Slip for detanglingReduces the force it takes to comb wet hair.2 pts
A humectantBinds water into the hair.1 pt
A hard-water chelatorBinds the minerals that dull hair in hard water.1 pt
A pH adjusterBrings the formula to the acidic pH hair prefers.1 pt
No detergent-dependent filmNothing that needs a clarifying wash to remove.1 pt
Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score measures completeness for the job: a weighted share of the systems this product type is usually built around that we find in this list. It does not rate how well the product works or its quality, and it never compares across product types.

Should you buy it?

Depends on your hair: see who it suits

Best user

Hair that stiffens on protein, for a protein-free formula and a proper reset wash

Biggest tradeoff

Not ideal for anyone sensitive to fragrance, sulfate-free routines and fresh keratin treatments, or dry or damaged hair

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, and what the formula shows

Claims are quoted from the brand. We mark a claim supported, partly supported or conflicting only when the ingredient list speaks to it. Everything else stays "stated by the brand". That isn’t a criticism: most claims can’t be checked from a label.

SupportedBacked by ingredients

Partly supportedSome supporting logic

Stated by brandNo clear evidence

Potential conflictFormula works against claim

Vegan formula without silicones, SLS/SLES sulfates, dyes, or parabens.

A sulfate detergent appears in the ingredient list.

Sodium Laureth Sulfate
Cocamidopropyl Betaine
Coco-Glucoside

Potential conflict

The label says otherwise.

How to read this

We look at the first 10–15 ingredients and what they do in a formula, not at the marketing. If the list doesn't speak to a claim, we don't assume.

Reviewers

What people report

Themes that come up again and again in sourced reviews, written by our researchers in their own words. We don’t store or scrape star ratings.

Many reviewers with bleached or damaged blonde hair say the shampoo made hair noticeably softer, shinier and easier to comb through after just one or a few uses.

The dominant theme across the 52 five-star reviews (4.7 average, 89% would recommend), often mentioned alongside using the full pre-treatment/shampoo/conditioner system.

Several reviewers specifically praise the fragrance as pleasant and long-lasting, distinct from the shampoo's cleansing or repair performance.

A recurring secondary compliment across multiple 5-star, gifted-product reviews.

A separate one-star reviewer says the shampoo does not clean hair well, is almost impossible to rinse out, and leaves hair feeling knotted and heavy.

One of only 2 one-star ratings among 61; echoed by a similar 'weighed down, heavy and greasy' complaint on this same product's Boots.com listing.

The most-liked negative review says the shampoo left highlighted hair frazzled, full of knots and frizz, and hard to comb, causing more hair loss during brushing than other shampoos.

Superdrug's most-liked negative review, from a reviewer who gets highlights every three months rather than an all-over bleach.

One reviewer with fine hair liked the results but noted the shampoo felt a little heavy after drying and styling, requiring a double shampoo.

A gifted-product review that otherwise praised the softness and shine but flagged a fine-hair-specific weight concern.

How this page was made

Everything above comes from our researched product record: identity, the ingredient list as printed, the brand's own claims, dated prices and review themes our researchers wrote in their own words. No part of this page is written by hand for one 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.
8 sources consulted for this product (3 manufacturer or regulatory, 4 retailer, 1 editorial), last checked 2026-09-04.
Ingredient references are linked for 17 of 21 product-aware annotations on this page. Fit notes are general formulation guidance. They aren’t a verdict on the finished product or on you.
We haven’t tested this product in a lab, and we don’t physically test your hair. Formula readings come from the ingredient list. Claims about how it behaves are labelled as the brand's.
Ingredient order tells you relative amount only above roughly 1%. Prices are what we saw on the dates shown and can change.
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 v23. Record last updated 2026-10-07.