About Knurle
A small supplement company in Colorado, three products, one job each.
You are reading this because you looked for it, and we would rather you found it here than had to guess. Health products live or die on who is actually behind them, so here is exactly who that is, no mystery, no team page full of stock photos.
Who we are
Knurle is based at 14701 W. 65th Way, Suite 5, Arvada, CO 80004, and that address is where the mail actually goes. The name comes from knurling, the crosshatch texture machined into a metal grip so your hand does not slide off it, on tools and torches and the odd kitchen canister. We liked the idea of a label you can actually hold onto, the way you hold onto a knurled grip in the cold.
We make three things. Moat is for immune support, Keel is for digestion, and Spark is 500 mg of NMN. Three bottles, three jobs, which is about as much as one shelf should have to hold. Pick the one that matches what your morning actually needs, or add all three if your shelf has room.
Who writes this
R. Kessler founded Knurle and writes the research notes on this site. That is a pen name, chosen on purpose: the writing should stand on the studies it cites rather than on who typed it, and the person behind it would rather stay out of the frame. What is not a pen name is everything else on this page. The address is real, the mail goes there, and a person answers it.
You will not find a “medically reviewed by” line on any article here, and that is deliberate rather than an oversight. There is no named clinician behind this site, so we do not imply one. When there is, the byline and the credentials go up with the article, and not before. The full method, including what we refuse to claim, is on the editorial policy page.
How it is made and tested
Everything is blended in FDA-registered, GMP-certified facilities in the United States, then packed and posted from Colorado. That is the whole supply chain: made here, tested here, shipped from here. Every batch carries a Certificate of Analysis from a lab that does not work for us, and you can ask for the one on your bottle. The full detail is on the testing page.
How the labels are laid out
Every ingredient amount is printed on the label, on its own line. Milligrams next to the ingredient they belong to, the whole way down the panel, so the number you want is where you would look for it.
How we write what we publish
The articles on this site, the ingredient breakdowns, the "the research" sections and the FAQs all cite the studies they lean on, right next to the claim they support, so you can go and read the original paper yourself. None of it is medical advice and none of it establishes a relationship with a clinician. A supplement, including ours, is not a treatment for any condition. If you are pregnant, nursing, under 18, or managing a medical condition, or you take prescription medicine, talk to your doctor before adding anything new to your shelf, us included.
Reach us
Questions about an order, an ingredient, or anything on this page? Contact us. A person answers, usually the same business day, from the same Colorado address above. If we do not know the answer, we will say so instead of guessing at you.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.