One of the most important metrics you can track as a supplement brand is your LTV/CPA (or nCPA).

Every single marketing decision ads, landing pages, email, SMS, subscriptions, upsells needs to be tied directly to this one number.

Because this is where your real profitability lives.

Your ROAS, AOV, purchase frequency, and cross/upsell rate all feed into it.
And most importantly, LTV/CPA decides exactly how hard you can scale your ad spend and acquire new customers without losing money.

We just ran this play for a scaling supplement brand.

Here’s what the Klaviyo + LTV dashboard looked like after we focused everything on improving that single metric:[Attach the full dashboard image here the one showing Revenue Flows £318,869, Total Revenue £604,546, LTV £88.90, Frequency 1.61, and LTV/CPA 4.64

Key Results:

• LTV: $88.90 (+41.79%)

• LTV/CPA: 4.64 (+22.97%)

• Revenue from Flows: $318,869 (+98.87%)

• Revenue from Campaigns: $285,677 (+680.74%)

• Total Revenue: $604,546 (+206.88%)

• Klaviyo-driven sales: 19% of total revenue

All of this came from treating Email & SMS as the biggest lever in the entire business.

We didn’t add more ad budget. We didn’t launch new products. We simply rebuilt the post-purchase flows, win-back sequences, and subscription nurturing so every email and text was engineered to increase purchase frequency and LTV.

The math is simple:

Higher LTV/CPA = you can spend more to acquire customers and still stay profitable.
That’s the difference between scaling comfortably and burning cash.

If you’re a supplement (or any consumables) brand and your LTV/CPA is sitting below 3.5–4.0, you’re leaving massive scaling potential on the table and probably stressing about profitability every month.

Email & SMS is hands-down the highest-ROI lever to fix it.