Our Story · D3X · Why we built a company around one nutrient
low on Vitamin D
Nobody's talking about it. We are.
D3X is a single-product supplement brand, founded in 2026 in New Jersey. We make one thing: a liquid Vitamin D3 + K2 in an organic olive oil base, in a glass bottle, made in the USA in a cGMP facility and third-party tested. One product, because most Americans are low on Vitamin D and almost none of them know it.
The founder story
"I found out I was low from a routine blood test. I had no idea. Then I found out most of the country is in the same spot."
I came from pharma, the finance side. You learn quickly where the industry's money goes, and where it doesn't. Roughly 3% of US healthcare spending goes toward keeping people healthy in the first place.2 The rest is built around treating them once they are already sick.
My own blood test was the part that made it personal. Low Vitamin D, no symptoms I would have connected to it, and no doctor had ever mentioned it. Once I started reading, the number got bigger than me: about 70% of Americans are low too.1 Vitamin D behaves more like a hormone than a vitamin.3 It is also almost never on a standard blood panel, so most people never find out.
Then I went looking for something to take. Plastic bottles. Seed oil bases. Fillers and proprietary blends. Everything on that shelf was built like Vitamin D was a side project.
So we built the opposite. One product, made properly, with a company around it whose only job is getting people to take it every day.
Why the gap exists
Five reasons
this happens
Most people are low for more than one of these at once.
01
Indoors most of the day4
Desks, screens, cars. Your skin only makes Vitamin D when UVB actually lands on it, and in a normal week that barely happens.
Why modern life lowers your D →
02
Food barely contains it3
Fatty fish and egg yolks have some. Almost nothing else does. You would need them daily to get close.
How much you actually need →
03
Sunscreen blocks it4
Even SPF 15 blocks most of the UVB your skin needs. Wearing it daily is still the right call for your skin. It just means the Vitamin D has to come from somewhere else.
Can you get enough from the sun? →
04
Skin tone changes the math3
More melanin means less Vitamin D produced from the same amount of sun. Rates of low status are highest in people with darker skin living far from the equator.
Why 70% of Americans are low →
05
Winter turns it off4
Above roughly 37° latitude the winter sun sits too low for UVB to get through the atmosphere at all. That covers most of the US, including New England, the Midwest, the Pacific Northwest and much of California.
Signs you might be low →
What we made
One bottle.
Three ingredients.
Liquid, because a dropper in your coffee is easier to keep up than a pill you forget. Olive oil, because Vitamin D needs fat to absorb and seed oil was never the only option. Glass, because plastic isn't. D3 with K2 as MK-7, made in the USA, tested batch by batch.
That is the whole product. There is no second SKU coming, no line extension, no greens powder. If we get this one thing right, that is the company.
Vitamin D isn't a cure for anything and we'll never tell you it is. It's a baseline most people sit under, it costs pennies to fix, and nobody advertises it because nobody can patent it. That's the gap we work in.
Questions about us
Who makes D3X?
D3X LLC, founded in 2026 and based in New Jersey. Founded by Tim Goldschmidt, who came from the finance side of pharma, with co-founders Golan Cohen and Maxime Murat. One product, three people.
Where is D3X made?
In the United States, in a cGMP-registered facility, bottled in amber glass with a 1 mL dropper. Every batch is third-party tested for potency and heavy metals before it ships.
Is D3X third-party tested?
Yes, and the certificate of analysis for the current batch is published on the Quality and Results page. D3 and K2 potency, plus heavy metals screening. You shouldn't have to take our word for what's in the bottle.
Why only one product?
Because roughly 70% of American adults are low on Vitamin D1 and most never find out. One product means every decision we make, from the carrier oil to the subscription timing, gets made around that one problem. More on why D3X.
Sources
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1
Vitamin D deficiency and insufficiency among US adults: prevalence, predictors and clinical implicationsView study →
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2
What do we know about spending related to public health in the U.S. and comparable countries?View source →
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3
Vitamin D DeficiencyView study →
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4
Sunlight and Vitamin D: A global perspective for healthView study →
Time to get
serious about
your D.
Three ingredients. One daily habit. A bottle and a fold-out guide, shipped free.
Shop D3X