.webp)
The Challenge
Nutrimuscle's previous measurement stack was giving them an incomplete picture of their channel mix. Before Fospha, Last Click was attributing less than 1% of revenue to TikTok, leaving more than 99% of TikTok's actual impact invisible to the team. Click-based measurement created this systematic bias toward Nutrimuscle’s demand capture channels, which appeared to perform well precisely because they were converting demand created elsewhere.
Budget decisions that were made based on this measurement meant the team risked cutting or under-investing in the channels driving genuine downstream revenue, while over-allocating to channels that were simply taking credit for it.
As Nutrimuscle began expanding their European footprint with their Paid Social activity growing more sophisticated, the team needed trusted, daily measurement that both marketing and finance could align and act on.
The Solution
Nutrimuscle onboarded with Fospha in June 2023, adopting always-on measurement as their primary lens on performance. Unlike Last Click or platform-reported data, Fospha's impression-led measurement gives every channel fair credit for the demand it creates. This gave Nutrimuscle a complete picture of what was actually driving growth - and the confidence to act on it across several key areas:
Planning the Next Move
With a trusted view of channel performance established, Nutrimuscle could move beyond asking which channels were working to the harder question: where would additional spend actually generate incremental return? Fospha's saturation curve modelling gave the team a channel-by-channel view of efficiency headroom, helping to identify exactly where budget could scale further and where it was approaching the point of diminishing returns.
Activating TikTok with Confidence
That forecasting clarity was the foundation for action. Fospha's channel health check dashboards had surfaced the gaps left behind by Last Click, and with incremental forecasting confirming TikTok's headroom, Nutrimuscle scaled TikTok spend by 390% over six months backed by Fospha’s measurement.
Optimizing the Full Mix
With TikTok's impact trusted and tracked daily, Nutrimuscle's focus into 2025 shifted toward optimizing at scale. Fospha's dashboards gave the team a daily view of every euro's efficiency across the full channel mix - the single reference point marketing and finance both worked from, and the numbers to defend investment decisions internally.
The Results:
Nutrimuscle's full-year 2025 results reflect a business that has moved from channel discovery to sustained efficiency gains.
At a blended level, Nutrimuscle delivered +14% blended revenue growth YoY, alongside a +60% improvement in blended ROAS with CAC falling by 47% over the same period. These results reflect a fundamental shift in how efficiently Nutrimuscle acquires and converts customers across its entire paid media mix.
Those gains weren't incidental. In Q1 2025, incremental forecasting gave Nutrimuscle the confidence to scale TikTok Conversion Prospecting spend by +9% - a decision backed by Fospha's saturation modelling. ROAS improved by +28% and revenue grew +39% in that period alone, demonstrating exactly what becomes possible when spend decisions are grounded in forward-looking data.
On TikTok specifically, full-year ROAS grew by +53% YoY and channel CAC fell by 32%. This incremental efficiency would have been invisible, and therefore impossible to optimize toward, under Last Click.
"We went from not knowing what TikTok was really doing for us to making it one of our most efficient channels. Fospha didn't just show us the opportunity - it gave us the confidence to act on it, and the numbers to back it up every step of the way." - Clement Dubois, Acquisition & CRM Manager, Nutrimuscle
The Bottom Line
Nutrimuscle's journey with Fospha demonstrates what becomes possible when measurement moves beyond Last Click: not just a one-time channel discovery, but a sustained competitive advantage built on daily, trusted data.
Their results show a brand extracting more value from its media investment, year over year - and building the data infrastructure to keep doing it. When the numbers can be trusted and acted on daily, the compounding advantage becomes structural
Footnotes
- Impact type: Blended and paid media (Paid Social, TikTok).
- Time range & period comparison: Year-over-year (Jan 1 – Dec 31, 2025 versus Jan 1 – Dec 31, 2024).
- Markets analyzed: France (FR).
.webp)
