The hormone you make from daylight — with the escort that tells its calcium where to go.
A level of 22 ng/mL is genuinely low — this dose exists to fix that number, not to follow a trend.
A meal with a little fat in it is the whole trick — it absorbs about twice as well.
Retest in a season; as your level comes up, the dose comes down.
“For someone whose level is genuinely low, vitamin D is one of the surest bets in this aisle — and once you're replete, more does nothing, which is why your dose steps down. The K2 rides along to point the calcium at bone.”
Want the depth? It's all here — tap what you're curious about. Nothing below changes the three things above.
Vitamin D is less a vitamin than a hormone precursor: your skin makes it from sunlight, and nearly every tissue carries receptors for it — bone, muscle, immune cells. Indoors-heavy lives, northern winters, darker skin, and age all pull levels down, and a 25-OH-D blood test reads the result directly.
K2 (as MK-7) rides along for one job: it activates the proteins that direct absorbed calcium into bone rather than soft tissue. D without K is a delivery with no address on it.
This is exactly why Liana doses to your measured level and steps down as it recovers — not to a trend.
How we weigh a study: we read it for you — including who paid for it. A study funded by the company selling the result is flagged and never load-bearing on its own. No supplement brand pays Liana — nobody's thumb is on this scale.
2,000–5,000 IU corrects a low level; 1,000–2,000 IU holds a good one. Your formula sets the number from your 25-OH-D and steps it down at your next draw.
D is fat-soluble; absorption roughly doubles alongside dietary fat.
The long-acting menaquinone form with the best human data.
Your 25-OH-D holds at 30–50 ng/mL across a retest — or summer, daylight, and fortified foods start doing the work — and the dose steps down, sometimes to zero. D is usually a correction with a maintenance tail, not a life sentence.
In an unregulated aisle, the brand is half the decision — so we made it for you.
D3 with 100 mcg K2 as MK-7 — the pairing the formula intends, without a second bottle.
Batch testing for label accuracy and contaminants, published by the brand.
Softgel carries its own fat (MCT), so absorption doesn't depend on what you ate.
A year of D3+K2 costs about what two lattes do.
Your own formula names the right bottle for your case. No brand pays to be here.