This is a frequently-asked-question at VitaminDWiki.
Here are a few answers. (These numbers assume that you want 10,000 IU of vitamin D daily.)
1) Sublinqual + Mg liquid
Get Vitamin D3 and Vitamin K-2 as a sublingual
Get the next most important cofactor, Magnesium as a liquid
Skip the other cofactors unless you are very concerned about your bones.
The sublingual from Michael's has 5,000 IU of vitamin D + 90 micrograms of Vitamin K-2
The sublinquals take about 2 minutes to dissolve, but are extremely easy to chew then melt in your mouth
Sublinguals are the form my wife prefers. She takes 2 per day
There are many suppliers of Magnesium liquid = Oil or Chloride
2) Cofactors as liquid
Osteodensity and several others provide many of the cofactors as a single liquid
3) Cofactors as a Fizzy powder and add Vitamin D powder
The Fizzy powder has K-2 which the Osteodensity lacks and several other nice vitamins and minerals.
3a) Add vitamin D from cut open capsules to 2) or 3)
Bio-Tech has the lowest-cost vitamin D in capsules – which can be cut open (knife, scissors)
Each Bio-Tech capsule provides 50,000 IU, so you would only need to take the powder once every days.
Example: for the Fizzy powder – which lasts for 60 days:
The Fizzy powder already contains 1,000 IU per day/serving
If you want 10,000 IU/day, then you need to add 60 X 9,000 IU = 540,000 IU
Since there are 50,000 IU in each capsule, you would need to cut open 11 capsules
3b) Add the vitamin D from bulk to 2) or 3)
Bulk vitamin D costs about 1/2 as much (no capsules to fill)
CLICK HERE for more about the bulk form at VitaminDWiki
Bulk = 100,000 IU per gram. They sell 100 grams for $23 + shipping
I measured it, and found that 1 level teaspoon weighs 1.6 grams, so has 160,000 IU of vitamin D3
To fortify the Fizzy above for 60 days you would need 540,000 IU = 3.38 teaspoons.
Reminder: Take with Almonds
It appears that Vitamin D is more bio-available if taken with some fats.
The best type of fat is monounsaturated, which is in Almonds
I take my vitamin D with a few almonds.
Reminder: Not too late at night
For some people, like myself, the vitamin D is similar to coffee, in that is acts as a stimulant.
So you might consider taking your vitamin D at least 3 hours before going to sleep.
Various studies (which did ot investigate monosaturated fats) found a 50% increase in vitamin D uptake when taken with the biggest meal of the day
You could also use the vitamin D powder to fortify your food
Vitamin D home fortification- don't wait 100 years for your govt
Mix it in something you would be taking over say a month - e.g. sugar, salt, jam, mouth wash, . . . .
Get vitamin D to the whole family
This is OK provided you do not get more than about 3,000 or 4,000 IU daily per person
More than that and you should, somehow, add some important cofactors to balance the body
Henry Lahore Feb 2013