Aloe Vera Adulteration and How Authenticity Is Proven

Why Aloe Is Uniquely Exposed

Four conditions, all present at once:

1. The product is a white, water-soluble powder.
2. The cheapest diluent — maltodextrin — is also a white, water-soluble powder. Visually and texturally indistinguishable.
3. A carrier is legitimately required. Spray-drying a ~99% water gel needs one, so its presence is not itself suspicious.
4. The headline number cannot detect it. As covered in our standardisation guide, a concentration ratio describes evaporation, so a heavily diluted powder can still be honestly called 200:1.

Point three is what makes this genuinely difficult. On most botanicals an undeclared carrier is straightforwardly wrong. On aloe you have to distinguish a necessary carrier from an excessive one — a quantitative judgement rather than a binary one.

Route 1 — Maltodextrin Dilution

The dominant issue. Carrier loaded well beyond drying requirements, or not declared at all.

What catches it:

• Polysaccharides on a dry, carrier-free basis. The decisive control — it forces the arithmetic into the open regardless of how much carrier is present.
• Carrier declared by name and percentage. Converts an omission into a written misrepresentation.
• Total ash read against the declared carrier. Inconsistency between the two is informative.

Route 2 — Non-Decolourised Material Sold for Ingestible Use

The route with a safety and compliance dimension rather than a commercial one.

Decolourisation costs money — activated-carbon treatment is a real processing step. Skipping it produces a cheaper material that still looks like aloe powder but carries aloin and related hydroxyanthracene derivatives, which are anthraquinone laxatives prohibited in EU food supplements.

What catches it: the aloin figure by HPLC, decisively — with a ceiling stated, and the figure required as a number rather than "complies".

Note also that an inner-leaf claim is not a substitute: imperfect filleting carries latex into the gel. Process declaration and aloin analysis are complements, not alternatives.

Route 3 — Aloe Species Substitution

The genus contains several hundred species. Several are used regionally for quite different purposes — including as sources of bitter latex specifically, which is close to the opposite of what a gel buyer wants.

What catches it: a species declaration by binomial, TLC and HPLC identity against authentic A. barbadensis reference material, and — indirectly but usefully — an anomalous aloin profile, since latex-oriented species behave differently.

Route 4 — Spent or Low-Quality Starting Gel

Not adulteration in the additive sense. Poor-quality leaf, over-aged gel, or gel that has been through processing that degraded its polysaccharides yields a powder with correct appearance, correct ratio and low actives.

What catches it: the polysaccharide assay on a carrier-free basis — again the workhorse control. Aloverose reporting adds resolution where a buyer wants a more particular characterisation of chain length.

Route 5 — Other Bulking and the Ash Trap

Starch, dextrose and mineral bulking beyond the declared carrier.

Aloe complicates this because total ash is characteristically high — the gel is mineral-rich and the carrier adds more — so the figure that normally flags mineral bulking is uninformative, and a generic limit rejects good material.

What catches it: acid-insoluble ash tightly limited (NMT 2%), which separates soil and silicate bulking from legitimate mineral content; total ash reported and read against the declared carrier.

The Testing Package

Why "Cheap Aloe" Is Usually Mostly Carrier

Worth stating plainly for anyone shopping on price. Genuine aloe gel powder requires a great deal of leaf — a ~99% water raw material — plus filleting or decolourisation, both real costs.

Maltodextrin costs a small fraction of that. So in a market where the headline number cannot detect dilution, price competition selects almost directly for carrier content. A quotation far below the cluster is not usually a sourcing advantage; it is a composition statement.

Practical Steps for a Buyer

1. Add "carrier-free basis" to your polysaccharide line. The single highest-value change available.
2. Require aloin as a number, with a ceiling, on every batch.
3. Require the carrier named and quantified.
4. Ignore the ratio when comparing quotations — compare carrier-free polysaccharides.
5. Limit acid-insoluble ash; do not apply a generic total-ash limit.
6. Third-party verify with carrier-free polysaccharides and aloin in scope. A ratio-only or as-is assay reproduces the blind spot entirely.
7. Treat a very low price as a composition signal, not a win.

SV Botanica quotes aloe polysaccharides on a dry carrier-free basis, declares the carrier by name and percentage, measures aloin by HPLC and states the figure, and declares part and process on every batch. Buyer-nominated third-party pre-shipment testing is welcome — see the supplier evaluation guide, or the product specification.