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Important Note About Shipping:
We provide same day shipping for all internet orders placed before 4:00 P.M. Central Time. We ship using U.S.P.S. Priority Mail so your order will arrive as quickly as possible (usually within 2 - 3 days).*
*Certain exceptions may apply.

"Three Ship Free"
When you order any 3 Master Supplements, Inc. products, shipping is free!

Problems ordering online? 
Please call us at:
(800) 926-2961

Consumer sales, call
(800) 926-2961 Ext 1 or 3.

Store sales, call
(800) 926-2961 Ext 2.

Professional Sales call
(800) 926-2961 Ext 3

All shipping discounts and FREE shipping are for USA customers only.

European Customers:
Click Here for Theralac
Click Here for TruFlora
Click Here for TruFiber
Click Here for Enzalase

For Canadian Orders, Please Call:

Theralac - The Best Probiotic

Theralac - The Best Probiotic

Theralac - The Best Probiotic

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Gas can be caused by a change in the bacteria in your GI Tract from stress, antibiotics, diet, steroids, alcohol, tobacco, etc. Get back to your normal self more quickly by taking a high quality probiotic like Theralac.

If you have a coupon code, enter it on the check out page after placing your order.

Why is Theralac® an excellent probiotic supplement?
  • Helps restore regularity
  • Clinically proven probiotic strains protected by 4 US patents
  • Patented acid-proof delivery which guarantees delivery to your intestinal tract
  • Protected during shipping with TIP® packaging
  • 30 billion CFU guaranteed through expiration
  • Five probiotic strains that colonize the entire G.I.tract
  • Safe for infants over 6 months
  • Patented probiotic stimulation with our prebiotic Lactostim® and sodium alginate
  • Third Party Independent analysis published online by lot number

30 capsules lasts 10 week on standard dose program!

There are 12 bottles included in every case (i.e. if you wish to order 6 cases, input 72 in the quantity field).

Order 3 or more bottles of Theralac and get Free Shipping!

*Does not apply to international orders.

For more information about Theralac visit

In Stock: Yes
Price: $47.95 

( Hover here to see volume discounts! )


TruFlora - Bio-cleansing Probiotic
Enzalase - Master Enzyme Supplement
Enzalase - Master Enzyme Supplement
TruFiber - Prebiotic Soluble Fiber
TruFiber - Prebiotic Soluble Fiber
Theralac - The Best Probiotic Travel Pack
Theralac - The Best Probiotic Travel Pack

Product Rating: (5.00)   # of Ratings: 6   (Only registered customers can rate)

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Showing comments 1-5 of 5
1. Alexander on 2/4/2013, said:

Thanks for great products! Alex
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2. ANN on 5/10/2010, said:

I've used many probiotic prodcuts in the past. None have worked for me. This product has greatly relieved the intestinal distress I've had for a very long time. I'm so grateful to have found this excellent product. Ann
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3. Jeff on 8/22/2009, said:

We just received this letter from a couple in NH. "I am writing to express genuine appreciation for your product Theralac. It is no stretch to say that it has been a God-send in my life. You see, in May 2006 upon retirement, my body developed an infection related to the use of antibiotics to treat a sinus condition. Before all was said and done, the infection cycled into C'difficile, a not easy to treat sickness in the colon. FInally, after losing 17 pounds and much of my zest for life, I slowly recovered my health. It was in this time that I was introduced to Theralac. I spoke with my physician about taking it. He didn't speak for it or against it SO with a what-can-I-lose-attitude, I started with your crash course, the tow week one tablet per day regimen until reducing the dose, as suggested to two tablets per week. The results have been most pleasing with stabilization of the intestinal functions, digestive comfort, and an overall sense of wellness. The sest is back!" SIncerely David and Evelyn Newmarket, NH
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4. Meg on 5/29/2009, said:

Recommended by my physician after 2 years of recurrent vaginal infections. Since I started Theralac Probiotics about a year ago, have not had a single recurrence of these infections, nor have I been "sick" at all. Incredible product!
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5. Sarah on 4/22/2009, said:

Best probiotic I've used - works great. Almost all of my symptoms have disappeared.
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Showing comments 1-5 of 5