Optimum Calcium K2 + D3
The companion to your bone routine. 210 mg of calcium at a load your body takes up a high share of, 5,000 IU of vitamin D3 to let it in, and 100 mcg of vitamin K2 as MK-7, the form and the amount the dose-finding trial landed on. All of it in 1 capsule, taken alongside your tablets.
Women already on the tablets, who added this.
Getting calcium in is the easy part.
Getting it where it belongs is not.
Calcium does not steer itself. Two other nutrients decide whether what you swallow is absorbed at all, and where it ends up once it is. Most calcium supplements carry 1 of the 2. This one carries both.
D3 opens the door
Vitamin D is what allows calcium to cross out of your gut and into your bloodstream in the first place. Heaney's review of the interaction describes vitamin D status and calcium intake working on absorption together, not separately. Without enough D, a good share of what you swallow simply passes through.
K2 does the directing
Osteocalcin is the protein that binds calcium into bone, and it sits inert until vitamin K2 switches it on, a step called carboxylation. Matrix Gla protein is its counterpart out in your soft tissue. Both of them wait on K2. This is the step a plain calcium tablet leaves out entirely.
The dose size decides the share
Calcium absorption is not a straight line. The larger the single dose, the smaller the fraction your body actually takes up. 210 mg sits well inside the range where that fraction stays high, which is the same reason the standard advice is to keep any single calcium dose at or below 500 mg.
This is not the thing that rebuilds your bones.
We publish the research showing that calcium and vitamin D on their own do not lower fracture risk. The largest analysis of it pooled 33 randomized trials and more than 51,000 adults over 50 and found nothing, at any dose. We are not going to pretend otherwise on our own product page.
What that analysis never tested was calcium and D with K2 alongside them. Directing calcium is the one job the old stack has no mechanism for, and it is the job this capsule is built around. So treat this as the companion to your bone routine, not the engine of it. The engine is your Optimum Shilajit.
Why 210 mg and not 600.
A bigger number on the label is not a bigger number in your bloodstream. In 1990 Robert Heaney fed healthy women calcium loads from 15 mg up to 500 mg with a meal and measured what was actually absorbed. The share went down as the dose went up, every time.
The small loads won, and it was not close.
At the smallest loads Heaney tested, absorption averaged 64.0% of the dose. At a 500 mg load it averaged 28.6%. Fractional absorption tracked inversely with the size of the load at P less than 0.001. That is the reason a 600 mg tablet does not deliver 3 times what a 210 mg capsule does, and it is why we did not chase a bigger number.
Absorption figures: Heaney RP, Weaver CM, Fitzsimmons ML. Influence of calcium load on absorption fraction. Journal of Bone and Mineral Research 1990;5(11):1135-8. pubmed.ncbi.nlm.nih.gov/2270776. The 100 mcg MK-7 amount follows the dose-finding trial of Inaba N, Sato T, Yamashita T, Journal of Nutritional Science and Vitaminology 2015;61(6):471-80, which tested 0, 50, 100 and 200 mcg daily in postmenopausal women and concluded that a daily intake at or above 100 mcg improves osteocalcin carboxylation. pubmed.ncbi.nlm.nih.gov/26875489. That trial measured osteocalcin carboxylation, a blood marker, not bone density and not fractures.
4 things in it. That is the whole list.
Calcium, vitamin D3, vitamin K2 as MK-7, and a little BioPerine black pepper extract. No fillers you have to look up. Packaged and lab-checked in our FDA-registered, cGMP facility in the USA.
The bottle that replaced 3 others.
1 capsule a day, with a meal.
Take 1 capsule with food, ideally the same meal you take your Optimum tablets with.
Food is not a nicety here. The absorption research this capsule is dosed against was measured under meal conditions, so taking it with something is part of the point. 60 capsules in the bottle, which at 1 a day is a 60 day supply.What is inside every bottle
Supplement Facts
† Daily Value not established.
Other Ingredients: Microcrystalline Cellulose, Hypromellose (vegetable capsule).
Suggested Use: Take 1 capsule daily with a meal, or as directed by your healthcare professional.
Caution: Do not exceed the recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.
Packaged and lab-checked in our FDA-registered, cGMP facility in the USA.
60 days to decide it earned its place.
We are a family-owned company out of Florida and we put our name on every bottle. If it does not fit your routine, write to Susan and we will refund you. No forms, no runaround.
Day money-back guarantee
Of every sale goes to charity
Capsule a day, nothing to rearrange
The questions women ask us most.
You say calcium supplements do not prevent fractures. So why do you sell one? +
Because both things are true and we would rather say so plainly. The evidence we cite in our own material is real. A 2017 analysis in JAMA pooled 33 randomized trials and more than 51,000 adults over 50 and found no significant reduction in hip, spine, or total fractures from calcium, from vitamin D, or from the 2 taken together.
What none of those trials tested was calcium and D with vitamin K2 alongside them. K2 is what activates the proteins that decide where calcium goes once it is in you, and that is the step the old stack has no mechanism for. We sell this as the companion piece to a bone routine, not as the routine itself, and we are not going to claim a fracture benefit we do not have evidence for.
Can I take this with my Optimum Shilajit tablets? +
Yes, and that is exactly what it is designed for. Most women who take this one take it with the same meal as their tablets. The shilajit is the part of the routine doing the heavy lifting. This is the part making sure the calcium in your diet and in this capsule has both the vitamin that lets it in and the vitamin that tells it where to go.
My old bottle said 600 mg. Why is this only 210? +
Because the share your body absorbs falls as the single dose climbs. Heaney measured this directly in healthy women in 1990: the smallest loads averaged 64.0% absorbed and a 500 mg load averaged 28.6%. A bigger label number does not translate into proportionally more calcium reaching you, and it is the reason the standard advice has long been to keep any one calcium dose at or below 500 mg. You also still eat calcium every day. This is meant to sit on top of your diet, not replace it.
What is MK-7 and why does the form matter? +
MK-7 is the long-chain form of vitamin K2, and it is the form used in the human research because it stays in circulation far longer than the short-chain forms. The amount matters as much as the form. A dose-finding trial in postmenopausal women tested 0, 50, 100 and 200 mcg a day and found that 50 mcg was not enough, while 100 mcg was. That is where our 100 mcg comes from. To be precise about what that trial measured: it measured osteocalcin carboxylation in the blood, which is the mechanism, not bone density and not fractures.
Is it 1 capsule or 2? +
1 capsule a day, with a meal. The serving size on the Supplement Facts panel is 1 capsule, and the bottle holds 60 of them, so a bottle is a 60 day supply. If you have an older bottle at home whose label reads differently, go with 1.
Does it upset your stomach or repeat on you? +
It is a small vegetable capsule rather than a large chalky tablet, and it has no taste or smell to come back on you. That is the single thing customers mention most. As with anything, taking it with food rather than on an empty stomach makes it easier still.
What if I do not want it? +
Then you pay nothing. You have a full 60 days. Write to susan@liveoptimum.co and we will refund you. If you are on the subscription, skipping a month or cancelling outright each take 1 click in your account, and we will never make you call anyone to do it.