Aloe standardisation turns on a single physical fact that most specifications ignore: the gel is about 99% water. Once you internalise that, the famous concentration ratios stop looking like potency and start looking like what they are — a description of how much water was boiled off. Everything else in an aloe specification follows.
The 99% Water Problem
Fresh aloe inner-leaf gel is approximately 99% water and roughly 1% solids. That single number explains most of what is strange about how aloe is sold.
Why ratios are meaningless
A "200:1" powder means 200 parts of liquid gel were reduced to 1 part of powder. But if the gel was 99% water, removing 99% of it already produces a 100:1 concentration without concentrating the actives at all — you have simply removed water.
So the ratio tells you about evaporation, not about polysaccharide content. Consequences:
- Two 200:1 powders can differ several-fold in actives, depending on the quality of the starting gel.
- Adding carrier changes the ratio arithmetic without changing the actives.
- A ratio cannot substantiate a content claim.
Why a carrier is normally required
Spray-drying a ~99% water gel into a free-flowing powder is difficult without a carrier — maltodextrin is standard. This is normal manufacturing, not adulteration. The problem is only ever the undeclared or excessive version.
The specification consequence: require polysaccharides on a dry, carrier-free basis, with the carrier declared by name and percentage. Those two clauses together make the actual active load visible regardless of how the ratio is described. Without them, "200:1" and a carrier of unstated size can conceal almost anything.
The Marker: Polysaccharides
Aloe's actives are the gel's polysaccharide fraction — principally acemannan, an acetylated mannan. Commercial standardisation is usually on total polysaccharides, at NLT 10% as a reasonable basis.
Aloverose — a commonly cited measure of long-chain aloe polysaccharide — is sometimes specified where a buyer wants a more particular characterisation, and can be reported on request.
Note that polysaccharide assay is not as clean as a single-compound HPLC method: it measures a class. State the method, and treat cross-supplier percentages with the caution we describe for other class assays such as gymnemic acids.
The Limit Parameter: Aloin
Aloin (barbaloin, as aloin A and B) is an anthraquinone C-glycoside concentrated in the leaf latex, not the gel. Along with aloe-emodin and related compounds it belongs to the hydroxyanthracene derivatives — a class with potent laxative activity.
Regulatory position: the EU has prohibited hydroxyanthracene derivatives in food supplements, including preparations from Aloe species containing them, and the widely applied industry standard for ingestible aloe sets aloin at not more than 10 ppm.
So aloin is measured for what it disqualifies, not for what it contributes — the same logic as coumarin on cinnamon and azadirachtin on neem. Three ingredients in this series where the critical number is one you do not want.
How Aloin Is Excluded
| Route | Method | Result |
|---|---|---|
| Filleting | Mechanical separation of gel from latex-bearing rind | Inner-leaf gel, low native aloin |
| Decolourisation | Activated-carbon treatment of whole-leaf juice | Aloin adsorbed and removed |
| Neither | Whole leaf, untreated | Aloin present — topical/industrial only |
Note that filleting alone is not a guarantee. Imperfect filleting carries latex into the gel, which is why an inner-leaf claim still needs a measured aloin figure rather than an assumption that the process was clean. Process declaration and analysis are complements, not alternatives.
Reading an Aloe CoA Properly
Take the parameters in this order:
- Aloin figure. Is it a number? Is it under your limit? If not, stop.
- Part and process. Inner leaf or whole leaf; decolourised or not.
- Carrier. Named and quantified?
- Polysaccharides, carrier-free basis. This is your actual purchase.
- Acid-insoluble ash. Not total ash — see below.
- Ratio. Last, and as context only.
Most buyers read that list backwards.
The Ash Trap
Total ash runs characteristically high on aloe. The gel is mineral-rich, and a declared carrier adds further. A generic botanical total-ash limit will reject good material.
- Total ash: reported with a generous limit, read against the declared carrier.
- Acid-insoluble ash: tightly limited (NMT 2%) — this is where soil and mineral bulking appear.
Writing an Aloe Specification That Holds
- Name the species by binomial — Aloe barbadensis Miller.
- Declare part and process per batch — inner leaf / whole leaf, decolourised / not.
- Require aloin as a measured figure by HPLC, with a ceiling appropriate to your application.
- State polysaccharides NLT X% on a dry, carrier-free basis, with the method named.
- Require the carrier declared by name and percentage.
- Treat the concentration ratio as reported, not specified.
- Limit acid-insoluble ash; read total ash as characteristic.
When Two Laboratories Disagree
- Same basis? Carrier-free versus as-is is the most common cause on aloe, and it can shift a polysaccharide figure dramatically.
- Same polysaccharide method? It is a class assay; protocols vary.
- Same moisture basis?
- Does aloin agree? It is a defined compound by HPLC, so it should — a divergence here is a genuine finding rather than a method artefact.
SV Botanica measures aloin by HPLC and states the figure on every aloe batch, declares part, process and carrier, and quotes polysaccharides on a dry carrier-free basis. See the aloe vera extract product specification, or the buyer's guide.
Source Aloin-Controlled Aloe Vera Extract from India
Polysaccharide standardised · aloin measured and declared per batch · inner-leaf & decolourised grades · carrier declared · CoA-backed · samples for qualified buyers