Weight management ingredients: specify carefully, claim nothing

Weight management is the ingredient category where undeclared pharmaceutical adulteration turns up most often. That history shapes how the material should be bought, and how carefully the finished product should be described.

Why this category is different

Regulators worldwide have repeatedly found weight-loss supplements spiked with undeclared drug substances — sibutramine and its analogues most notoriously, along with laxatives and diuretics. The adulteration typically happens upstream, in the ingredient or in a "proprietary blend" bought from a broker. A finished-product manufacturer testing only against its own specification will not find it, because the specification does not look for compounds nobody declared.

Sourcing controls that actually help

• Buy single, named ingredients rather than proprietary blends. A blend of undisclosed composition cannot be verified against anything, which is exactly what makes it attractive to bad actors.
• Know the full chain. If your supplier is a trader, ask who manufactured it and where. A chain you cannot describe is a chain you cannot audit.
• Screen for undeclared pharmaceuticals by LC-MS/MS against a panel of known adulterants, on incoming material, for this category specifically. It costs real money and is proportionate to the risk here in a way it would not be for, say, a mineral salt.
• Fingerprint against a retained reference, so an unexplained peak in a later batch is visible.
• Be wary of unusually strong material. A botanical extract assaying far above what the plant normally yields is a finding, not a bargain.

Specifying the common ingredients

Most legitimate materials in this category are ordinary botanical extracts and should be specified as such — named marker by HPLC, plant part, extract ratio, solvent, carrier, and the standard contaminant panel. Garcinia should be specified on hydroxycitric acid by HPLC; green coffee on chlorogenic acids; green tea on EGCG, with attention to the total catechin content, since several markets impose limits on EGCG in food supplements.

Where the real risk sits

The commercial risk in this category is rarely the ingredient specification. It is the claim made on the finished product. Ingredient suppliers do not control that, but they should be clear in writing about what the material is and is not — we supply specification data and identity, and the customer's own regulatory affairs function decides what may be said about it in their market. Being explicit about that division of responsibility protects both sides.