Briefing a deformulation project: samples, scope, timeline and cost drivers
What to send, how to scope it and what you get back: a buyer’s guide to briefing a cosmetic deformulation project so the lab answers the question you actually have.
By Dr. Premalatha, Ph.D., Life Science, Regulatory Consultant, Cosmetic Science Lab
Quick answer
- What is a deformulation brief? A short document telling the lab which product to analyse, why, and what you need back: an ingredient list, approximate levels, or a working prototype.
- Send at least three sealed retail units from one batch, plus the carton.
- Choose qualitative or quantitative scope first. It is the biggest driver of time and cost in deformulation services.
- Sign an NDA before samples ship, and agree who owns the results.
Take-home message for formulators
- Turn "what is in it?" into one question the lab can answer, with match criteria you can measure
- Send batch codes, constraints and any existing data so the lab does not repeat work
Take-home message for brand owners
- Scope, not the product, sets most of the time and cost
- Agree the NDA and ownership of results before anything ships
01Why the brief decides the result
Reverse engineering cosmetics, also called deformulation, means identifying and, where needed, measuring the components of a finished product. Labs use complementary techniques such as HPLC and GC-MS, with methods chosen to suit the sample matrix and the compounds of interest [2].
The INCI list is only a starting point. In the EU, ingredients are listed in descending order of weight, but those below 1% may appear in any order after those above 1% [1]. The label tells you what is there, not the grades, the ratios between minor ingredients or the process; see how to read an INCI list.
A vague brief ("tell us everything in this serum") produces a long report that may not move your project forward. A focused brief ("match the texture and pH of this serum for the EU and UK markets") gets a shorter, cheaper and more useful answer. For the method itself, read deformulation explained: from INCI list to a working formula.
02What to send: the sample checklist
Sample quantity depends on scope. Quantitative work and prototype matching use more material because each method needs replicates and development runs.
| Item | Why the lab needs it | Tip |
|---|---|---|
| 3+ sealed retail units | Replicates, method development, a retained reference | Same batch code; buy 5–6 for quantitative or matching work |
| Outer carton and leaflet | INCI list, claims, warnings | Photograph all panels before posting |
| Batch code, purchase date and country | Formulas can differ by market and over time | Note it in the brief |
| Your constraints | Banned ingredients, target markets, cost-in-use | Shapes the prototype, not the analysis |
| Existing data | SDS, past reports, complaint details | Saves repeat testing |
03Scope definition: five decisions to make
Good scope definition turns a product into a question the lab can answer.
- Objective. Competitor scan, prototype matching, defect investigation or a claim check.
- Depth. Qualitative (what is in it) or quantitative (how much of each).
- Targets. The whole formula, or only actives, the preservative system, emulsifiers or UV filters.
- Match criteria. If you want a prototype, define success: appearance, pH, viscosity, sensory profile, and how many rounds.
- Markets. So the rebuilt formula is compliant where you sell. Our regulatory team can check this alongside.
| Qualitative | Quantitative | |
|---|---|---|
| Answers | What is in the product | How much of each component |
| Workflow | Screening and identification | Screening, identification, then quantitation [3] |
| Sample need | Lower | Higher |
| Time and cost | Lower | Higher (reference standards and calibration) |
| Best for | Competitor scans, ingredient checks | Prototype matching, defect investigation |
04Confidentiality and NDA
Your brief reveals your product plans, so protect it before anything ships.
- Sign a mutual NDA covering the benchmark's identity, your brief and all results.
- Agree in writing who owns the report and any prototype formula.
- Ask for blind-coded samples if the benchmark's name should not appear in lab records.
- Check intellectual-property questions, such as patents or trade dress, before launch; see is reverse engineering cosmetics legal?
05Report deliverables: what you get back
| Deliverable | What it contains |
|---|---|
| Analytical report | Methods used, chromatograms and spectra, identified components with confidence level |
| Component table | INCI-style list with likely function; estimated ranges if scope is quantitative |
| Gap notes | What could only be identified by class, such as polymers, botanical extracts or fragrance |
| Prototype and comparison (if ordered) | Lab samples, formula and side-by-side data against the benchmark |
| Next steps | Stability, safety and scale-up recommendations |
Once a prototype is approved, the next steps are stability and safety testing and a clean handover to production; see cosmetic scale-up and tech transfer.
06Timeline ranges and cost drivers
| Phase | Indicative timeline | Depends on |
|---|---|---|
| Scoping, NDA and quote | About 1 week | How complete your brief is |
| Qualitative analysis | 2–4 weeks | Matrix complexity |
| Quantitative analysis | 4–8 weeks | Number of targets and reference standards |
| Prototype matching | 2–4 weeks per round | Match criteria and number of rounds |
Deformulation services are priced per project. These factors move cost most:
- Product type: sunscreens, colour cosmetics and multi-phase emulsions need more method work than simple gels.
- Depth: quantitative scope costs more than qualitative.
- Number of target components and whether reference standards must be bought.
- Prototype rounds and the tightness of match criteria.
- Turnaround: expedited timelines need dedicated instrument time.
- Add-on testing such as stability or sensory panels.
07Questions readers ask
How many samples should I send for deformulation?
At least three sealed units from one batch for qualitative work, and five to six for quantitative analysis or prototype matching.
Can reverse engineering cosmetics give an exact copy?
Rarely. Some materials can only be identified by class, so the realistic goal is a prototype that matches performance and sensory profile.
Is my brief kept confidential?
Yes, under a signed NDA, with ownership of results agreed before work starts.
How long does a deformulation project take?
From about three weeks for a qualitative report to several months when quantitative work and multiple prototype rounds are included.
Ready to brief your benchmark?
Our reverse engineering team scopes deformulation services around your question, protects it under NDA and stays with you from analysis to a matched prototype.
08References
- Regulation (EC) No 1223/2009 of the European Parliament and of the Council of 30 November 2009 on cosmetic products. Article 19(1)(g). EUR-Lex
- Rico F, Mazabel A, Egurrola G, Pulido J, Barrios N, Marquez R, García J. Meta-analysis and analytical methods in cosmetics formulation: a review. Cosmetics. 2024;11(1):1. DOI
- SGS Polymer Solutions. Deformulation: technical handout (stages of a deformulation). polymersolutions.com
Update log
- Published by Cosmetic Science Lab
This article is general technical information, not legal, regulatory or medical advice. Confirm requirements for your product and market before launch.
