Daily nutrition,
made simple.
- Since 1984
Doctor-formulated nutrition
Forty-one years of refinement, eleven patent updates.
- 35 formulas
Built for daily wellness goals
Energy, focus, immunity, joints, healthy aging.
- AM + PM
Patented two-tablet system
Twice-daily dosage for absorption you can rely on.
- 60-day
Satisfaction guarantee
Try any MDR formula risk-free. Full refund.
Best sellers.
Two tablets,
eight-second dissolve.
VitalFactors is MDR’s effervescent NAD+formula. Drop two in a glass of water each morning — energy, focus, and healthy aging in one daily ritual.
Built around NAD+.
- Cellular energy supportNAD+ is the spark your cells use to make energy. The body makes less of it as we get older — VitalFactors helps put it back, so the morning feels like a morning again.
- B vitamins your body can useWe use the methylated forms of B12 and B6 — already in the active state, so your body absorbs them straight away. Real, daily energy without the conversion step.
- Resveratrol from grapesThe famous antioxidant in red wine, in a clinical dose. We use the same patented resVida® form trusted in published longevity research.
- Nineteen ingredients, one glassVitamins, antioxidants, and amino acids working together in one effervescent tablet. No fistful of pills — just a glass of water in the morning.
One after breakfast.
One after lunch.
Dr. Christakis's patented AM / PM system splits daily nutrition in two — taken after breakfast and after lunch — so your body has the right nutrients all day. Different formulas for men and women, because the math is different.
- Patented AM / PM since 1984
- Doctor formulated
- 60-day satisfaction guarantee
- Free US shipping over $50
Built for men.
Daily nutrient coverage calibrated for what men actually run short on — lower iron, more selenium, more antioxidants.
AM tablet — after breakfast
B-vitamins, vitamin C, D3, zinc, and chromium. Daytime nutrients that fuel cellular metabolism through the morning — energy, focus, and immune defense.
PM tablet — after lunch
Magnesium, vitamin E, selenium, carotenoids, and odorless garlic. Antioxidants that support cardiovascular health and round-the-clock recovery.
What's different vs Women
Lower iron · higher selenium · more PM vitamin A · more total vitamin C · stronger PM garlic.
Why two tablets
AM and PM separate the nutrients that fuel morning energy from the ones that work better later in the day. One bottle, one ritual — taken with food, not at bedtime.
Dietary supplement. Not intended to diagnose, treat, cure, or prevent disease.
Same patented AM / PM system. Different priorities.
Both formulas split nutrients across breakfast and lunch for round-the-clock coverage. What changes is the dose math — adjusted for what men and women each tend to be short on.
- Lower iron
- Higher selenium
- More PM vitamin A
- More total vitamin C
- More AM zinc
- More PM garlic
- Higher iron
- More total calcium
- More B6
- More PM zinc
- Stronger B-vitamin coverage
Built for women.
Higher iron, more calcium, more B6 — the coverage women's daily diets often run short on, designed by physicians for everyday use.
AM tablet — after breakfast
Iron, B-vitamins, vitamin C, D3, and zinc. Iron absorbs best in the morning — paired with vitamin C for max uptake. Energy + immunity in one tablet.
PM tablet — after lunch
Calcium, magnesium, vitamin E, and selenium. Bone-density support women's diets often miss, plus antioxidants for round-the-clock recovery.
What's different vs Men
Higher iron · more total calcium · more B6 · stronger PM zinc · stronger B-vitamin coverage.
Why two tablets
Splitting AM and PM lets us put iron in the morning (with vitamin C) and calcium in the afternoon, when your body absorbs them best.
Dietary supplement. Not intended to diagnose, treat, cure, or prevent disease.
Pick the formula built for you.
Both use the same AM / PM system. The nutrient math is the only thing that changes.
Lower iron, more selenium and garlic. Daily nutrient coverage without piling on what most men don't need.
Shop Men For WomenWomen Fitness TabsHigher iron, more calcium, more B6. The coverage most women's daily routines need.
Shop Women60-day satisfaction guarantee · Free US shipping over $50 · Real phone support.
Find what your body needs.
Pick where to start. Every formula maps to a daily goal.
From the people taking MDR every day.
“Fitness and nutrition unite for a vibrant, healthy lifestyle. That’s why I take VitalFactors as my favorite natural energizer!”
“VitalFactors helps keep my immune system strong. I’ve run the Badwater 135-mile ultramarathon in Death Valley 12 times, and I rely on VitalFactors and other MDR products to stay physically fit and mentally sharp.”
“I’ve been taking VitalFactors and other MDR vitamins for over 20 years. I topped the charts before Elvis, and at 91 I’m still active and strong—that’s why I call VitalFactors my ‘fountain of youth.’”
“I use the MDR Fitness Tablets in conjunction with the MDR Stress Release Tabs and have taken them for over 25 years. Excellent products.”
Before you start.
What makes MDR different from other supplement brands?
For more than 35 years, Medical Doctors Research has developed advanced nutrition formulas with input from physicians, scientists, and nutrition researchers. The focus is ingredient quality, balanced dosing, and formulas built for daily use — not generic, one-size-fits-all supplementation.
How do I know which MDR product is right for me?
Start with your main goal — daily foundation, energy and focus, healthy aging, joint support, immune support, heart health, digestion, vision, or skin support — and choose the formula that matches what you're trying to improve.
What is MDR's return policy?
MDR offers a satisfaction guarantee. Please see our Refund and Returns policy for current details.
Are MDR products doctor developed?
Yes. MDR formulas are developed with input from physicians, scientists, and researchers across nutrition, aging, sports medicine, biochemistry, food science, and public health. The goal is practical, balanced formulas built around real daily health needs.
How does MDR auto-delivery work?
Auto-delivery sends your selected MDR products on a regular schedule so you stay consistent without thinking about it. Manage shipments, change timing, skip a delivery, or cancel anytime from your account.
Forty-one years of
clinical formulation.
Doctor-formulated since 1984. The same daily routine — refined every year for forty-one running. That’s the whole offer.
Doctor-formulated · Made in the USA · Free US shipping over $50