Vitamin D3
Foundational immune and mood support
Vitamin D3 deficiency is common in adults, especially for people who work indoors or live in northern climates. This high-potency 5,000 IU formula helps replenish D3 levels so your body's daily systems can perform at their best.
What is inside the bottle.
A low-friction daily essential for long-term wellness routines.
Take 1 capsule daily with a meal containing fat, as Vitamin D3 is fat-soluble and absorbs best with dietary fat.
Anyone living in northern climates, working indoors, using sunscreen regularly, or who has been told by their doctor they have low Vitamin D levels.
Vitamin D3 (Cholecalciferol)
5,000 IUThe bioavailable form of Vitamin D, identical to what skin produces from sunlight.
From inconsistent to ritualized.
Low sunlight, inconsistent baseline support
A simple daily foundation for immune, mood, and bone health
Premium wellness design, medical-grade restraint.
Affinity Direct formulas are backed by the same clinical team that serves 10,000+ patients across four Midwest locations — not a fulfillment operation with a wellness logo.
| Feature | Affinity Direct | DTC Brand | Drugstore |
|---|---|---|---|
| Licensed provider oversight | |||
| No proprietary blends | Varies | Varies | |
| Subscription savings | 22% off | 10–15% | None |
| Supply per bottle | 140 days | 30–60 days | 30–90 days |
| LegitScript certified | N/A | ||
| Free 2-day shipping (UPS) | Varies | In-store only |
Your daily formula was developed under medical supervision.
Dr. Koehler is a board-certified emergency medicine physician who completed his residency at Carolinas Medical Center in Charlotte, North Carolina, where he served as Chief Resident. He subsequently completed the Morgentaler Method™ Fellowship Program under Dr. Abraham Morgentaler of Harvard Medical School — one of the most advanced hormonal medicine training programs available to practicing clinicians.
He also completed the "Hormone Therapy for Early Adopters" course led by Dr. Rachel Rubin, a board-certified urologist and fellowship-trained sexual medicine specialist, and holds a Certificate in Peptide Therapy. He is a member of the American Academy of Anti-Aging Medicine. Dr. Koehler serves as Affinity's Medical Director, overseeing clinical protocols across all four Midwest locations and the online supplement formulas.
“These formulas reflect the same clinical standards we apply daily across four Affinity Whole Health clinics — transparent dosing, no proprietary blends, and a protocol I'd recommend to my own patients.”
— Dr. Michael Koehler, MD — Medical Director, Affinity Whole Health
A real clinic backing your daily routine.
Affinity Whole Health was founded in 2012. Four Midwest clinic locations, 10,000+ patients treated, and a 4.9/5 rating built over a decade of real care. Our supplements carry that same clinical standard to your door.
4 Midwest Clinics
Valley View · Columbus · Cleveland · Indianapolis. Actual brick-and-mortar locations with licensed providers on staff.
10,000+ Patients
Over a decade of real clinical care — not a startup with a wellness logo. The same team reviews your protocol.
Patient Care Coordinator
Every patient gets a dedicated PCC handling medications, scheduling, billing, and ongoing support.
Hybrid Care Model
In-clinic visits, telehealth, remote labs, and body composition testing — supplements are part of the same protocol.
Est. 2012 · 14-year track record. LegitScript certified, HIPAA compliant, 2024 Crain’s Fast 50 (138% growth), 2024 Best Employers in Ohio. Supplements backed by the same providers serving patients in-clinic every day.
Real routines, not supplement hype.
The 140-day supply is a game changer
“The 140-day bottle makes it easy to stay consistent. I like that the label is straightforward and not dressed up as a proprietary blend. My D levels are back in range after six months.”
Doctor-trusted, actually affordable
“My PCP had mentioned D3 for years. Finding a clinic-branded one at this price made the decision easy. No fluff, just 5,000 IU and a clean label.”
Pair Vitamin D3 with another formula.
These formulas pair well with Vitamin D3 based on shared protocols in our clinical catalog.
Questions about Vitamin D3.
Everything you need to know about this formula — usage, sourcing, subscriptions, and clinical context.
Yes. The formulas are part of the Affinity Whole Health brand and are packaged as daily-use supplements for direct shipping.
Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Affinity Direct supplements are not intended to diagnose, treat, cure, or prevent any disease. Consult your licensed healthcare provider before beginning any supplement regimen, especially if you are pregnant, nursing, taking medications, or have a medical condition. LegitScript certified. HIPAA compliant. Affinity Whole Health, LLC.