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VitalFactors
Drop two tablets in water on weekday mornings for a fizzy NAD+ ritual with resveratrol and EGCG.
Fitness Tabs for Men
One multivitamin split into AM and PM tablets, timed to how men absorb nutrients.
Fitness Tabs for Women
One multivitamin split into AM and PM tablets, timed to how women absorb nutrients.
Stress Defense
One tablet that turns food into steady energy on the days that ask the most of you.
From the people who take MDR.
“Fitness and nutrition go hand in hand — that’s why I take VitalFactors as my favorite natural energizer.”
Chris CuomoNewsNation primetime anchor“VitalFactors is part of my training routine. 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 active.”
“I’ve been taking VitalFactors and other MDR vitamins for over 20 years. I topped the charts before Elvis, and I’m still active and strong today — it’s been part of my routine the whole way.”
Pat BooneAmerican singer-songwriter and actor“I use the MDR Fitness Tablets in conjunction with the MDR Stress Release Tabs and have taken them for over 25 years. Excellent products.”
…and two hundred more, published word for word since 2012.
“This is a great formula….i love that the capsule is so small and goes down easily with no after taste. I do feel more flexible and my last physical with the doctor shows i am in great sha…”
“I have been taking these MDR vitamins for years! I feel so good all the time...these are worth the money for sure.”
“Stress Defense is the best. I’m not sure if they reduce the stress in my life but they certainly give me the energy to deal with everything!”
“Referred to these by my 85-year-old mother. Always had problems with oily skin. Within a week, my skin cleared up and my energy level was off the charts. Excellent product.”
“I was taking Vision Formula for a few years and noticed my vision was clearer and better. I quit taking it and tried a cheaper supplement and noticed my eyesight was getting blurry and no…”
“Have tried others but always come back to MDR”
“I’m enjoying the vitamins and see the benefit of them”
“THIS PRODUCT IS WAY BETTER THAN ALL MY EXPECTATIONS. IT IS MY FAVORITE SUPPLIMENT. I AM 71. THANK YOU”
“This product makes my brain and body work better. At my annual medical checkup, the numbers from my bloodwork all exceeded required minimums. The doctor and I were both impressed. Happy,…”
“Been using the Fitness tabs and these for 30+ years. Simply the Best”
“Best , will make you feel better and think clearer all day .”
“These are the best vitamins we have ever taken, Have tried others but always come back to these”
“We have more energy and calmness simultaneously. Great bargain and products”
“This is an outstanding supplement. It truly seems to stabilize my heart in these stressful times.”
“I have been taking VitalFactors for several years now and I can say I definitely see and feel the difference! I follow the recommended usage of five days on/two days off and it is working…”
“I believe these to be a very good value. At $1.19 per day for vitamins and stress defense for both men and women. Would be even less per day if both parties would be consistent in taking…”
“Simply the best! I've been taking the Fitness Tabs for more than 10 years and wouldn't consider any other brand.”
“Thanks to MDR!!! Feeling better then ever since taking this wonderful formula!!”
“I will never be without OnGuard. It has kept me well year round for the first time in my life and I travel a great deal. I recommend it to all my friends to keep them healthy. This is an…”
“I'm a loyal Women's Fitness Tabs fan. I've been taking the Fitness Tabs for 20 years. I feel that I'm doing something important for my health by doing so and I have the added benefit of g…”
“I know Pristinium fish oil which has the highest grade ingredients is good for my heart, my brain and my joints. It keeps my skin looking great as well.”
“I have been using these each day for years and will continue !”
“Can't say enough on this high-quality product my energy feels grate taking these tab AM/PM is the best? Thank you MDR”
“Been taking VitalFactors for two months. Love the taste so much that it has become my favorite drink. Hate that I’m supposed to skip 2 days a week but I follow the regimen and am feeling…”
“Huge fan of Fitness Tab for Women. My energy has been through the roof and I have never felt better.”
“I appreciate the fact you removed titanium dioxide from your formula and added Iodine. I came back to this product because you removed titanium dioxide and iodine is a necessary nutrient.…”
“At age 76, I feel my absolute best when I take Vital Factors. It provides me the energy I need and the mental alertness to accomplish my goals on a daily basis. Also helps me accomplish m…”
“Have tried others but always come back to MDR”
“I have been taking these vitamins since I was in my 30's. That's a long time ago (not telling how long). I have always enjoyed great health, and I wouldn't change for anything! Please kee…”
“Taken these’s supplements for years ! Work well for me”
“I'm 62 years old and have taken many vitamins over the years, but this is the only vitamin I have ever taken that actually makes me feel healthier.”
“I've been taking/drinking Vital Factors for at least 20 years and never want to stop. The benefits are amazing! Thank you for making such a great vitamin drink.”
“I have been a competitive runner for four decades, so my need for strong supplements to keep me going is exceptional. At one time, I to try a lower priced product that seemed like it was…”
“Product easy to use, tablet dissolves easier now, and gives me more energy and focus just after a few days of starting it!”
“We have more energy and calmness simultaneously. Great bargain and products”
“I have more energy and my vision is clearer. My body does not feel tired.”
“I believe these to be a very good value. At $1.19 per day for vitamins and stress defense for both men and women. Would be even less per day if both parties would be consistent in taking…”
“I've been taking these supplements for twenty years and they are the best! As MDR provides the latest information with regard to quality ingredients, you can be sure that you're getting j…”
“I have never taken a product like this before and it really works. Feeling great and healthier. Love it!!”
“Onguard does me wonders, especially in the winter time. Having two homes where I eat off one of my property during harvest time and in the winter, I stay fit with my Onguard”
“These were recommended to me by my uncle who looks like he's in his 40s but is well into his 50s. These will wake you up and make you feel great without giving you the jitters. The evenin…”
“They work well for me as I workout almost daily and my energy level is really good and I attribute at least part of the credit to MDR Fitness Tabs.”
“I've been using these for over 40 years and they are great!!!”
“Been taking the MEN'S AM/PM FITNESS TABS for about 30 years. Excellent!!”
Medical Doctors Research, Sunrise, Florida, since 1984.
That is what MDR stands for, and it is where the company still is — forty-two years on, family-owned, formulating and shipping from the same corner of South Florida.
Physicians, scientists and researchers work on the formulas. Most of what MDR sells today it has sold for decades, in the same shapes: a morning tablet and an afternoon one, a fizzy drink you dissolve in water. The catalogue is small on purpose.
More about MDR
Beyond multivitamins, your age defying energy drink.
VitalFactors is MDR’s effervescent NAD+formula. Drop two in a glass of water each morning — energy, focus, and healthy aging in one fizzy ritual.
Your Daily AM + PM Nutrition System.
The original multivitamin, split into a morning and an afternoon tablet — one formula for men, one for women.
Good to know.
What makes MDR different from other supplement brands?
Since 1984, Medical Doctors Research has developed advanced nutrition formulas with input from scientists and nutrition researchers. The focus is ingredient quality, balanced dosing, and formulas built for daily use — not generic, one-size-fits-all supplementation.
Can I take Fitness Tabs and VitalFactors together?
Yes — they're designed to pair. Fitness Tabs are your daily vitamin and mineral foundation; VitalFactors adds effervescent NAD+, antioxidant, and healthy-aging support on top. Many MDR customers take both.
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 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.
Clinical nutrition,
refined since 1984.
Forty-two years. One daily routine, refined every year. That’s the whole offer.
Doctor-formulated · Free US shipping on Subscribe & Save or 3+ items