How to Switch Manufacturers Without Changing Your Product
Switching manufacturers is where brands discover what they do and do not actually own. A move can be clean or it can change your product noticeably. The difference is whether you hold the specification, the formulation rights and the data before you start.
Why Switches Change Products
This guide is for brand owners moving production of an Ayurvedic, herbal or supplement product in India.
A product is the output of a formulation, a set of input materials and a process. A new manufacturer can replicate the formulation if you own it and it is documented. They are less likely to replicate the input sources and the process detail exactly, which is where noticeable differences in taste, colour, texture and smell originate.
Consumers notice these differences and generally do not report them; they stop reordering. So the aim of a well-managed switch is to control everything controllable and to detect differences before customers do.
What You Need Before Starting
Establish these first.
- A complete written specification: composition with quantities, excipients, extract markers and standardisation, physical characteristics, pack and shelf life.
- The right to have the formulation manufactured elsewhere, from your agreement or a separate confirmation.
- An approved retained physical sample from the current manufacturer, as the reference standard.
- Recent certificates of analysis showing the actual values your product has been running at.
- Your current stability data, as a comparison baseline.
- Details of input material specifications, including extract standardisation and sources where you have them.
- Your approved artwork and the compliance review record.
The Transition Sequence
Overlap rather than switch.
| Step | What It Involves |
|---|---|
| Qualify the new manufacturer | Licence scope, GMP, documentation, testing capability |
| Transfer the specification | Written, complete, with the retained sample as reference |
| Trial batch | Small batch made to specification before committing |
| Compare against reference | Side-by-side on appearance, smell, taste, texture and assay |
| Adjust | Resolve differences with the new manufacturer before scaling |
| Regenerate stability | New data in your pack; input sources and process differ |
| Run in parallel | Keep existing supply while the new source is validated |
| Switch and monitor | Watch complaints and reorder rates after the change |
The trial batch and the side-by-side comparison are the steps most often skipped under time pressure, and the ones that prevent the problem this whole exercise exists to avoid.
What Needs Re-Testing
Do not assume existing data transfers.
Stability
Needs regenerating. Input sources and process differ, so the previous data describes a product made differently.
Full Assay Panel
Run the complete panel on the trial batch, not a reduced one, to establish where the new source sits against specification.
Physical Characteristics
Weight, hardness, disintegration, viscosity, solubility as relevant. These differ most between manufacturers.
Sensory Properties
Appearance, smell and taste against the retained reference. The most consumer-visible and the least often formally checked.
Switching Checklist
Work through in order.
- Confirm your right to have the formulation made elsewhere.
- Assemble the complete written specification.
- Secure a retained reference sample from current production.
- Qualify the new manufacturer on licence scope and documentation.
- Transfer the specification in writing with the reference sample.
- Commission a trial batch.
- Compare side by side on sensory, physical and assay properties.
- Resolve differences before scaling up.
- Regenerate stability data in your pack.
- Keep existing supply running in parallel during validation.
- Secure written change control with the new manufacturer.
- Monitor complaints and reorder rates closely after the switch.
- Keep the old and new specifications and data in the product file.
Considering a Change of Manufacturer?
Share your current specification and volume and our team will set out licence scope, trial batch terms and documentation.
Frequently Asked Questions
Why do products change when manufacturers change?
Because a product is the output of a formulation, specific input materials and a process. A new manufacturer can replicate a documented formulation but is less likely to replicate input sources and process detail exactly, which produces differences in taste, colour, texture and smell.
What do I need before switching?
A complete written specification, the right to have the formulation made elsewhere, a retained reference sample from current production, recent certificates of analysis, your current stability data, and input material specifications. Without the first two, a clean switch is not available.
Does my existing stability data still apply?
No. Input sources and process differ at the new manufacturer, so the previous data describes a product made differently. Stability needs regenerating in your actual pack with the new source.
What step is most often skipped?
The trial batch and the side-by-side comparison against a retained reference sample. These are usually dropped under time pressure, and they are precisely the steps that prevent the product change the switch is meant to avoid.
How do I know if the switch went wrong?
Monitor reorder rates as well as complaints. Consumers who notice a product has changed usually do not report it, they simply stop buying, so retention data often reveals a problem that complaint data does not.