How to Take
Bio-Avail D3/K2
Everything you need to get the most from your liquid vitamin D3 and K2 formula—dosing, timing, and what to expect as your body restores optimal levels.
1–5 drops daily (flexible dosing)
Bio-Avail D3/K2 is a liquid formula delivering 1,000 IU of vitamin D3 and 120 mcg of vitamin K2 (both MK-4 and MK-7 forms) per drop, suspended in MCT oil for optimal absorption. With 600 servings per bottle, it's less than 6 cents per serving.
Your Flexible Dose
Place drops directly on your tongue or add to food. Most adults benefit from 2–5 drops daily (2,000–5,000 IU of D3), depending on current vitamin D levels, sun exposure, and body weight. Consult your healthcare provider or get your levels tested to dial in your ideal dose.
Where you are on the way there
Vitamin D and K2 do most of their work behind the scenes, so the sequence below is as much about what's being built as what you'll feel. The timing varies from person to person and depends a lot on where your levels started. Here's how it unfolds.
As vitamin D levels start to rise, people who came in deficient often notice steadier mood and energy in the first few weeks, and sometimes better sleep. If your levels were already decent, this stage is subtler or passes unnoticed—and that's not a sign anything is wrong. Either way, the K2 has been at work from the first drop, directing calcium where it belongs.
Vitamin D stores take a while to fill, and most people see them reach a healthy range over one to three months. The benefits at this stage tend to show up as absences: catching fewer of the bugs going around, bouncing back faster when one gets through. A follow-up blood test is the clearest way to see this stage, since it often isn't something you feel.
This is the part that matters most and shows least. Over months and years, the D3/K2 pairing supports bone density and keeps calcium in your bones rather than your arteries, and stable vitamin D levels smooth out the seasonal dips many people feel each winter. The drops you take when nothing seems different are the ones doing this work.
Build the habit
A few drops a day is as simple as it gets. Here's how to never forget.
Add drops to your morning meal
Drop your dose directly onto food—eggs, yogurt, oatmeal—or place on your tongue before eating. The MCT oil is tasteless and clean.
Keep the bottle on the table
It's small enough to sit on your breakfast table or kitchen counter permanently. If you see it every morning, you'll take it.
Set a reminder
Our free Adapt Naturals Daily app (iOS, Android coming soon) sends a reminder at your first meal and tracks your streak. Details just below.
Don't aim for perfection
Missing a day won't undo your progress. Vitamin D is stored in your fat tissue, so levels don't drop overnight. Continue the next day as normal.
Never miss a dose
Vitamin D stores fill over months, and a supplement you can't feel working is the easiest one to forget. We built a free app to make the daily part effortless. Set your reminder once and let it do the remembering.
- A daily reminder at the time you actually take it
- Track your streak and watch your consistency build
- All your Adapt Naturals products in one place
Your questions, answered
Most adults benefit from 2–5 drops daily (2,000–5,000 IU of D3). The ideal dose depends on your current vitamin D levels, sun exposure, body weight, and health goals. We recommend getting your vitamin D levels tested to dial in your optimal dose.
Liquid allows for flexible, precise dosing—you can easily adjust by 1,000 IU increments. It's also suspended in MCT oil, which enhances absorption of these fat-soluble vitamins. And at 600 servings per bottle, it's extremely cost-effective.
Vitamins D3 and K2 work synergistically. D3 helps your body absorb calcium, while K2 directs that calcium to your bones and teeth—and away from your arteries, where it can cause problems. Taking D3 without K2 means calcium may end up in the wrong places.
Bio-Avail Multi contains 3,000 IU of D3 and a vitamin K blend. If your vitamin D levels are already optimal, the Multi may be sufficient. If you're deficient or want to fine-tune your dose, D3/K2 gives you flexible, precise control on top of what the Multi provides.
Mood and energy improvements may appear within 2–4 weeks, especially if you were significantly deficient. Immune, bone, and cardiovascular benefits build over 1–6 months as vitamin D stores fully optimize.
Refrigeration is not required. Store in a cool, dry place away from direct sunlight. The bottle is designed to keep the formula stable throughout its shelf life.
No need to worry. Vitamin D is stored in your fat tissue, so levels don't drop from one missed day. Continue your normal dose the next day—no need to double up.
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