Close Banner Integrative Health Bone Fractures & Vitamin D — Can Supplements Actually Help? Author: Molly Knudsen, M.S., RDN March 05, 2026 Registered Dietitian Nutritionist By Molly Knudsen, M.S., RDN Registered Dietitian Nutritionist Molly Knudsen, M.S., RDN is a Registered Dietician Nutritionist with a bachelor’s degree in nutrition from Texas Christian University and a master’s in nutrition interventions, communication, and behavior change from Tufts University. She lives in Newport Beach, California, and enjoys connecting people to the food they eat and how it influences health and wellbeing. Image by Javier Díez / Stocksy March 05, 2026 Supporting bone health has to be vitamin D’s claim to fame—thanks to its role in aiding calcium absorption. What’s less known is how vitamin D status impacts one's likelihood of experiencing a break (or fracture) in a bone.  Bone fractures are, unfortunately, a common concern as people get older. With age, bone density and quality weaken, and the bones become more fragile and prone to breaking. In fact, up to 50% of women and 22% of men 1 are expected to experience a fracture in their lives.  So, if vitamin D is good for bone health , then increasing vitamin D intake must aid in preventing fractures, right? Well, considering that most people are deficient or insufficient in this vitamin, and getting adequate quantities from the sun or food alone is unlikely, mindbodygreen does believe that pretty much everyone would benefit from a vitamin D supplement.  But we’d be remiss not to mention that research specifically on supplementing with vitamin D and bone fractures hasn’t been super straightforward. So we’re going to do our best to break it down for you. Low vitamin D status is linked to bone fractures vitamin D3 potency+ Optimized vitamin D3 with absorption technology for whole-body health* ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ (199) Shop now Shop now Now, most of the data show that low levels of vitamin D in the blood increase your risk of bone fractures. For reference, vitamin D deficiency is when blood levels are at or below 20 ng/mL 2 , and 30 ng/mL 2 is considered the upper end of insufficiency (or low vitamin D levels).  A large study from 2017 found that a low vitamin D level was linked to a 25% increased risk of total bone fracture 3 and a 48% greater risk of hip fracture.  And researchers of a 2020 meta-analysis of 20 studies including almost 42,000 people over 60 years of age found that people with a more favorable vitamin D status were 11% less likely to have a hip fracture 1 . (The same level of protection wasn’t seen for total fracture risk, though.)  So while poor vitamin levels may be especially connected to hip fractures, it’s standard practice for healthcare professionals to consider low vitamin D status or low vitamin intake as a red flag for risk of bone breaks in general 4 . Taking vitamin D seems to help risk of falls and fractures in the elderly However, studying vitamin D supplementation as it directly relates to bone fractures has been challenging, and there’s debate within the scientific community on the role it plays. That’s because some studies show supplementation is beneficial while others don’t 5 .  This is at least partially due to discrepancies in how studies are set up from the start including how much vitamin D study participants take (800, 1,000, or 4,000 IU?), how often, and for how long.   Studies that do show benefits of vitamin D supplementation have a few things in common. Daily vitamin D intake is superior to intermittent intake (like a large dose once a month) The minimum dose to see a benefit appears to fall between 800 IU to 1,000 IU The people who benefit the most are deficient in vitamin D For example, a 2022 meta-analysis pooled data from 32 studies and found a 13% lower risk of fractures (related to bone loss) and falls with 800 IU of daily vitamin D supplementation and a 22% lower risk when 1,000 IU was taken daily 6 . And supplementation was the most beneficial for those who had a known deficiency before supplementation began.   A review published in 2020 found a similar (minimum) vitamin D dose to be beneficial but emphasized the importance of pairing it with a calcium supplement 7 .  This raises the question: How much vitamin D should you take for bone health? Right now, around 29% of U.S. adults are considered straight-up vitamin D deficient 8 , while 41% are vitamin D insufficient 8 .  So most people need a supplement to first correct that inadequacy in the diet. From there, the purpose of supplementation is to achieve vitamin D sufficiency (levels at 50 ng/mL or more) for life. And that requires a dose of about 5,000 IU a day. We reached the conclusion of 5,000 because research has demonstrated that supplementing with 1,000 IU of vitamin D3 9 raises the average adult's blood levels of vitamin D level by approximately 10 ng/ml, which means it takes 5,000 IU of vitami