The Introvert Entrepreneur

The Introvert Entrepreneur

Building a Supplement Business From Scratch - February 2025 Update

Follow along as I document the creation and operation of a supplement business.

Jarek Lewis's avatar
Jarek Lewis
Feb 23, 2026
∙ Paid

The Introvert Entrepreneur newsletter is a documentation of multiple online businesses that I own and operate.

Most of you reading this know that by now.

While most posts here are about LEGO or Pokémon card investing, I like to sprinkle in a few about other ventures.

This is one of those posts and I totally understand if it appears random.

I encourage you to read on though.

There isn’t anyone else on the internet showing you what I show you in this post.

I know this because I’ve tried to find it and it doesn’t exist.

So, what is this post about you ask?

Early last year I launched a supplement business in the golf industry (one of my favorite hobbies) that solves a unique set of problems.

It’s called Diald.

Due to the sensitive financial details included, you must be a paid subscriber to read the entire post below.

I still cannot believe that this silly little idea is profitable. How profitable?

You’ll have to keep reading.

Let’s take a look at what has happened over the last 30 days:

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