Supplements is one of the few DTC niches where you can scale to $10M/month and beyond. It’s also one of the hardest. You’re competing against VC-funded brands that can afford a $200 CPA. CPMs are high. Meta’s policy restrictions make it harder again.
The brands that break through aren’t the ones with the cheapest CPAs. They’re the ones with the unit economics to outbid everyone else on cold traffic.
Four numbers decide whether you can play that game:
- Cost of delivery below 20–25% of revenue. COGS plus shipping. If you’re above that, every dollar of ad spend gets choked before it touches the P&L.
- Subscription opt-in at 80%+ on the first order. Top brands push 95%+. This is the difference between paying for a customer once and paying for them forever.
- 90-day LTV as your primary scaling metric past $500K/month. Day-1 ROAS stops being the right signal. You’re now buying the third and fourth bottle, not the first.
- AOV lifted with bundles, volume discounts, and post-purchase upsells. Free shipping thresholds are the cheapest AOV lever you’re not using.
Supplements scale because the customer comes back. If your offer doesn’t engineer the comeback, no amount of creative volume will save you.