Dietary Supplements: keeping a $201 million account under control

This was already a market-leading supplements brand on Amazon. It did not need rescuing, and visibility was never the problem.

The pressure at this size is quieter: keep compounding growth on a base already measured in nine figures without allowing costs to expand unnoticed beside it. A mistake that looks small in a percentage column can be worth hundreds of thousands of dollars.

Three years of account performance

Between March 2023 and July 2026 the account recorded $201,249,151 in total sales across 8,405,378 orders.

Advertising contributed $78,995,711 from 3,361,078 ad orders, converting at 20.62%.

Total ad spend across the period was $39,452,735, at an ACoS of 49.94% and a TACoS of 19.6%.

Why the ACoS number is not the story

An ACoS near 50% looks alarming read alone. It is the wrong number to read alone.

ACoS describes only the advertised slice. At this scale, a large share of advertising is doing work that never shows up in its own attribution: defending branded search against competitors bidding on the brand, holding position on head terms that carry the category, and supporting products whose organic rank depends on sustained velocity.

TACoS at 19.6% is the number that describes the business: total advertising cost as a share of total revenue. Roughly a fifth of revenue funds the advertising that protects the other four fifths.

What three years look like

The monthly chart makes the shape plain: steady growth from a standing base in 2023 to roughly $9–10 million a month by 2026, with ACoS holding a flat band near 50% the entire way and TACoS tracking around 20%.

Flat is the achievement. Efficiency that holds while volume multiplies is a different discipline from efficiency achieved once. A rate that stays put across a fortyfold increase in monthly revenue is being actively maintained, not left alone.

What scale actually changes

A 20.62% conversion rate on 3.36 million ad orders is not achieved by finding better keywords. It is achieved by not breaking anything: at this volume, a structural change applied carelessly costs more in a week than a year of optimisation returns.

That is why this account is run by a group rather than an individual. At this scale, the work is as much about discipline, handoffs, and restraint as it is about finding the next opportunity.