Supplements eCommerce Case Study: 63% ROAS Increase & 38% Lower CPA in 30 Days on Meta Ads

I recently took on a supplements eCommerce store's Meta Ads account and implemented a series of strategic optimizations that dramatically improved their profitability.

The goal was clear: improve profitability while reducing customer acquisition costs and increase ROAS from 2.98 to over 4.5.

By the way, ROAS means Return On Ad Spend, which means how much money you make from sales compared to how much money you pay on your ads. For example, if you make sales of $10,000 from paying $1,000 on ads, your ROAS is 10,000 / 1,000 = 10. Essentially on a ROAS of 10 you earn $10 for every $1 spent on advertising. A nice and predictable money printing machine, right?

Here's what happened to the cost per acquisition:

Before my optimization (May 2025), the account had an average cost per purchase of $27.93

Before 

1. Amount Spent: $61,285.67
2. Cost per Purchase: $27.93
3. Purchase Conversion Value: $182,527.55
4. Purchase ROAS: 2.98

After optimization (June 2025), the cost per purchase decreased to $17.39 — a 37.7% reduction:

After 

1. Amount Spent: $28,108.94
2. Cost per Purchase: $17.39
3. Purchase Conversion Value: $136,526.30
4. Purchase ROAS: 4.86

Done with the math? Let's move on.

Before optimization, ROAS was around 2.98X as seen in the ''before'' image above. 
After optimization, it increased to 4.86X — a 63.1% improvement:

In fact, increasing the ROAS (AKA the profitability of the account) in just 30 days while simultaneously lowering costs is exactly what every ecommerce business dreams of.

I successfully reduced ad spend by 54.1% (from $61,285.67 to $28,108.94) while maintaining strong conversion value. This wasn't about cutting budget arbitrarily — it was about eliminating wasteful spend on underperforming campaigns and audiences.

The result? More profit per dollar spent, with a leaner, more efficient advertising operation.

Note on CPM: CPM remained relatively stable between both periods, which tells us the improvements came from better targeting, creative performance, and conversion optimization — not just cheaper impressions.

The transformation came from three core strategic changes:

When I took over the account, it was running on Meta's automated settings — relying on broad targeting and letting the algorithm figure everything out. While automation can work, it often leads to wasted spend, especially when the account lacks proper signal optimization.

I shifted the entire strategy toward a manual, data-driven targeting approach that gave me full control over audience selection, bidding, and budget allocation.

This was the game-changer.

I completely remade all their custom audiences by:

1. Importing high-value customer lists — focusing on customers who had made multiple purchases or had high lifetime value
2. Leveraging top-of-funnel key events — using engagement data like add-to-cart, initiated checkout, and content views to build warm audiences
3. Creating lookalike audiences based on the high-value customer segments

By targeting people who actually looked like their best customers, rather than broad, cold audiences, I dramatically improved conversion rates and reduced wasted spend.

Here's where most advertisers get it wrong: they constantly chase "fresh" creatives and kill off ads that have been running for a while.

I did the opposite.

My criteria for selecting creatives was simple:

1. ✅ Social proof — ads with a high number of likes, comments, and shares
2. ✅ Product availability — only promoted SKUs that were actually in stock

Why social proof matters:

Creatives don't die if they have a good amount of engagement. Meta sees them as valuable — more valuable than new creatives without any social proof. An ad with 500 likes and 100 comments signals to Meta's algorithm that people are engaging with it, which improves delivery and lowers costs.

I kept the best-performing creatives running (even ones that had been active for months) and only introduced new creatives when they had a clear angle or offered something the existing ones didn't.

By focusing on these three strategic shifts:

1. ✅ Manual targeting instead of automation
2. ✅ High-value custom audiences
3. ✅ Leveraging creatives with social proof

I achieved:

1. 37.7% lower cost per purchase
2. 63.1% higher ROAS
3. 54.1% reduction in ad spend

All within 30 days.

The client now has a highly profitable, scalable advertising system that can grow with confidence. With a ROAS of 4.86, every dollar invested returns nearly $5 in revenue — making it easy to reinvest profits into scaling the account further.

The efficiency gains mean the business can now:

1. ✅ Scale ad spend with confidence knowing the unit economics work
2. ✅ Invest the saved budget into product development, inventory, or other growth initiatives
3. ✅ Maintain healthy profit margins while growing customer acquisition

If you're running a supplements store, fashion brand, or any ecommerce business and want to see if I can replicate these results for you, here's my offer:

I'll work with your team for 2 weeks at no cost, analyze your ad accounts, then deliver a custom plan to lower CPA and boost ROAS.

No obligation. No risk. Just a clear roadmap showing you exactly where the opportunities are.

If my audit shows real value and you want to move forward, we can discuss me joining your team full-time to implement the strategy.

Ready to scale profitably? Let's schedule a call and see if I can help.