The "Power of Three": A Simple 3-Step Strategy to Cut Cancer Risk by 60%
How the "Power of Three" Can Cut Cancer Risk by 61%
When I first heard about the DO-HEALTH trial, I was shocked to learn how simple the interventions were for participants to achieve such a profound reduction in cancer risk. Keep reading to find out what you can start doing today to reap these same benefits.
In the health world, we often look for the "quick fix" or "magic pill," which—to my knowledge—doesn't exist (yet). However, the latest science tells us the real magic isn't in a single supplement or a grueling gym routine—it’s in the synergy of three simple, daily habits.
What is the DO-HEALTH Trial?
A groundbreaking study, known as the DO-HEALTH trial, followed over 2,000 older adults to see how small lifestyle changes impact long-term health. While the study was conducted across several European countries (including Switzerland and Germany), its findings are good news for anyone looking to lower their risk of cancer.
The researchers discovered that combining Vitamin D3 and Omega-3 supplementation with a simple resistance training program reduced the risk of invasive cancer by a staggering 61%. Talk about moving the needle!
Why the "Combination" Matters
Most studies look at one thing at a time. The DO-HEALTH researchers did something different: they looked at how these three "wellness pillars" work together.
While taking Vitamin D alone or doing a bit of exercise showed some benefits, the results were modest. However, when participants did all three, the protective effect was massive. It’s like a tripod—it only stands strong when all three legs are in place.
Breaking Down the "Power of Three" Protocol
You don't need to be an elite biohacker to see these results. The study used manageable lifestyle modifications that fit right into a busy family schedule:
Vitamin D3 (2,000 IU daily): Often called the "sunshine vitamin," D3 helps regulate genes responsible for cell growth. Study participants used 2,000 IU daily—a modest dose often found in high-quality multivitamins.
Omega-3 (1000 mg daily): Found in fish oil, Omega-3s reduce "silent inflammation." Most people don't get enough from diet alone. Participants supplemented with 1000 mg (1 gram) of Omega-3s daily.
Simple Resistance Training (3x per week): This wasn't heavy bodybuilding. The study used a Simple Home Exercise Program (SHEP).
What is "SHEP" Training?
The resistance training required was designed for accessibility (the study participants were age 70+). It involved 30 minutes of basic strength movements like:
Sit-to-Stands: Using a sturdy chair to work the legs.
Wall Push-ups: Building upper body strength without a bench press.
Bicep Curls: Using light weights or household items.
Single-leg Stance: Improving balance and core stability.
More Than Just Cancer Prevention
The benefits of combining Vitamin D3, Omega-3, and resistance training don’t stop at cancer. Follow-up data from 2025 showed that this "triple threat" also slowed biological aging. Participants had "younger" DNA markers than those who didn't follow the protocol.
Other studies, like the VITAL trial, have shown that Vitamin D and Omega-3s work together to reduce autoimmune issues and support heart health, making this protocol beneficial across your entire lifespan.
How to Start Today: Lifestyle Recommendations
At Well North Living, I believe health should be approachable. If there is one thing we learned today, small changes can have big impacts when it comes to our health. Here is how you can translate this study into your daily life routine:
Audit Your Supplements: If you aren't getting at least 2,000 IU of Vitamin D3 or 1000 mg of Omega-3s daily, you may need to switch up your routine.
Vitamin D3: Aim for a daily multivitamin with 2,000 IU included, like O.N.E. Multivitamin from Pure Encapsulations. Note that you may require more (up to 4,000 IU) to reach "optimal" vitamin D blood levels of 40–60 ng/mL. I personally take 4000 IU of Vitamin D3+K2 from Pure Encapsulations. The addition of vitamin K2 ensures proper calcium absorption in the body.
Omega-3: Look for 1,000 mg of EPA/DHA, not just "1,000mg of fish oil." EPA and DHA are the active Omega-3 components responsible for health benefits, while total fish oil grams often include filler fats. My family uses Omegenics 5-in-1 Fish Oil to get 1000 mg EPA/DHA in one capsule.
Quality Matters: Always purchase from suppliers that perform third-party testing for purity. I shop through Fullscript to ensure my family gets practitioner-grade supplements without worrying about whether or not they contain the actual ingredients listed.
Shop my Vitamin D3 & Omega-3 recommendations on Fullscript for a reader discount
Bottom Line: It’s Never Too Late
As a parent, I love high-impact, low-stress ways to keep our family healthy. This study proves we don’t need fancy equipment—we just need consistency.
It is also worth noting that it is never "too late." The DO-HEALTH participants were in their 70s and significantly lowered their risk of cancer! Imagine the compounding impact if you start today. Share this with your friends and family—don't wait to start adding the "Power of Three" to your routine.
References
The DO-HEALTH Trial (Main Study): Bischoff-Ferrari, H. A., et al. (2022). Combined Vitamin D, Omega-3 Fatty Acids, and a Simple Home Exercise Program May Reduce Cancer Risk Among Active Adults Aged 70 and Older. Frontiers in Aging, 3. https://doi.org/10.3389/fragi.2022.852643
The VITAL Trial (Supporting Heart & Immune Health): Manson, J. E., et al. (2020). Principal results of the VITamin D and OmegA-3 TriaL (VITAL). The Journal of Steroid Biochemistry and Molecular Biology, 198, 105522. https://doi.org/10.1016/j.jsbmb.2019.105522
Follow-up on Biological Aging (2025 Findings): Bischoff-Ferrari, H. A., et al. (2025). Effects of vitamin D3, omega-3 fatty acids and a simple home exercise program on physical activity and DNA markers. Frontiers in Aging, 5. https://doi.org/10.3389/fragi.2025.12180030
*A Note From Well North Living: This post is for educational purposes only and isn't a substitute for individualized medical advice — please consult your healthcare provider before starting any new supplement or health protocol. This post may also contain affiliate links, including to my Fullscript dispensary; if you purchase through these links, I may earn a small commission at no extra cost to you. I only share products and brands I personally use and trust. Thanks for being here, and cheers to your health!
