Life Extension Bone Strength Collagen Formula, Calcium Collagen chelate, Calcium fructoborate, Vitamin D3, Magnesium Citrate, Silicon, Boron, Gluten-Free, Non-GMO, 120 Capsules
$33.75
Last updated on 19/07/2026 11:32 pm Details
- Collagen and calcium – When it comes to your bones, calcium and collagen are intimately connected. KoAct is a special combo of chelated calcium and hydrolyzed collagen peptides. Together, they support optimal bone density and strength.
- Bone cell support – There are polyphenol compounds in dried plum that support the activity of osteoblasts, the special cells that actually rebuild bone. This formula also has vitamin D3—an essential nutrient for bone health.
- Bone health minerals – Magnesium, silicon and boron are all part of bone mineralization (the process your body uses to make your bones stronger). Our boron is made with a calcium/carbohydrate complex that’s similar to what is found in fruits and veggies.
- Ingredients matter – We use only the finest raw ingredients with the quality and purity you deserve. The majority of our products are non-GMO, gluten-free and manufactured in the USA—and a Certificate of Analysis is available for every one.
- Live your healthiest life – We believe the answers to a healthier life are within reach, and that scientific research is the key to getting us there. That’s why so many of our formulas feature specific ingredients and amounts based on scientific studies.
| Brand | Life Extension |
|---|---|
| Flavor | Unflavored |
| Primary Supplement Type | Boron, Calcium, Magnesium, Vitamin D3 (as cholecalciferol) |
| Unit Count | 120 Count |
| Item Form | Capsule |
| Item Weight | 0.4 Pounds |
| Item dimensions L x W x H | 2.58 x 2.58 x 5.13 inches |
| Special Ingredients | Boron, Calcium, Magnesium, Silicon, Vitamin D3 (as cholecalciferol) |
| Diet Type | Gluten Free |
| Product Benefits | Enhances bone health, Helps maintain healthy bone mineral density, Optimizes bone strength & flexibility See more |
Donna –
This is the only calcium supplement that contains KoPac, a special collagen substance developed and tested in Japan which has one of the highest rates of osteoporosis in the world. According to my dexa scan results I have had a 17% increase in bone density over 2 years. I believe adding this product to my supplements has contributed to this amazing increase in bone density.
Trudy C. –
Osteoporosis is a complex thing, so I do all I can to build bone. On the nutrition side of things, I researched what needs to go into that task from the point of view of vitamins and minerals. This product reflects the mineral side of that research very well.
I can’t report on whatever increased bone density might have taken place from whatever positive habits I’ve developed, because three years ago, I stopped taking bone density tests. Since I have no plans to change anything I’m doing as a result of those tests, and since they only provoke my docs to insist on heavy bisphosphenate drugs, it makes no sense to do the tests. SO: I can’t substantiate that my density has increased. But I can say that my fingernails are doing better. Ever since menopause, for some inexplicable reason, the nails on my ring and middle fingers on both hands have been the worst. the others were weakened too, but not nearly as much. Now, after two years of taking supplements and eating very well, the healthier six fingernails are back to “normal,” and the “problem nails” are better, with far fewer of those awful splits that cause bleeding and bandaging once in a while. I can’t attribute that to all the weight and impact exercise that I do as my other major effort to build bone the way nature intended (mostly ballet and irish dance but also weight vests and belts), so I’m guessing it is the nutrition, including supplements. This product is the main thing I take on a daily basis, plus I take Vitamin K and all the others at the front of the alphabet.
I should also mention that these capsules don’t choke me! I will never again try to take any calcium tabs! I literally had to have my son do the Heimlich maneuver on me after attempting to swallow one of those. Never again!
Iuliana Halagian –
Maintaining bone density by using this product
bets29 –
just purchased my 2nd bottle. With the 1st I could definitely tell the differences in the fingernails. And if they are strong I know the rest of my body is receiving the benefits of these capsules.
Las tres Americas –
First of all, I have not been asked to write a review at all. This is an honest review: this product works miracles on my fingernails, about 2-months ago, one of my fingernails tried to grow with no succes, as a deep crack on its edge would prevent from growing more. This had happened for nine years, I tried every single nail product, buffing my nails, and different types of calcium including Strontium. I had given up on that fingernail clipping it as soon as it’s edge ruptured. My other fingernails had lost the first layer causing an aggravating dryness. I also tried lotions, etc, until I started taking this Koact product: I take one X 300mg, an hour or more than that, another 300mg, and later one Caltrate Calcium X 600mg, total 600mg of Calcium from Koact + 600mg calcium= there goes my daily dosage of 1200mg Calcium. I pray that Life Extension will continue this product because thanks to it, my nails are strong, again, the dryness is gone, and the annoying cracked edge of that nail is a thing of the past.
Thank you, Life Extension for making Bone Strength with Koact Collagen, I will continue being loyal to you!
Carol DeMarco –
LIFE EXTENSION PODUCTS LIVE UP TO QUALITY AND THEY HAVE WELNESS PEOPLE THAT CAN HELP YOU WHEN YOU CALL. BEEN USING THEM FOR YEARS NOW AND AM ALWAYS SATISFIED. NOW I ORDER THROUGH AMAZON BECAUSE I DON’T HAVE A CREDIT CARD.
marcieileen –
I wanted a product like this mainly for the cal-mag formula. Wasn’t really looking for nail-strengthening in particular, but wow, it really helped! I don’t care for all the fillers & excipients which Life Extension uses in all their excellent products, so I switched to something else, but did not get the same result… so I’ve switched back. This formula just plain “works” for me!
Lynn –
I have been diagnosed with osteopenia. It was highly recommended for me to take collagen to rebuild my bones and this product after much research is what I am using. My doctor has approved.
I will be anxious for my next bone scan to see the results.