Self Health Resource Center (SHRC) was established in 1993 by Dr. Clark’s family, we are therefore the 1st manufacturer to follow her protocols when manufacturing.  However you may find other brands carrying her name, this is because she was of generous spirit and gave others permission (without charge) to use her name.  SHRC products are made available online at this website.

Our Difference?
It is commitment to PURITY that creates results that matter and contributes to your success. It’s our passion for POTENCY that makes enduring and positive impact on you.  It’s our ability to consistently and systematically focus on QUALITY and good CUSTOMER SERVICE. Our difference? It’s people that succeed in their health goals because they have the best tools needed.

Read about our customer's success here, and about our story here.

Don't settle for second best. Purchase your supplements from those TRAINED by Dr. Hulda Clark to make the products the way she wanted them made. Without compromising. 

• SHRC is the only manufacturer that received direct involvement from both Geoff Clark and Dr. Hulda Clark. The company was established by Dr. Clark’s son and is the first manufacturing facility to manufacture 100% according to Dr. Clark’s protocols. Below please find below 19 quality and purity protocols that we follow.
• Nineteen years later, as of Sept 2012, SHRC is the only company that offers all of our Dr. Clark labeled products (100%) without any magnesium stearate, food colors, etc.  Dr. Clark was strictly against using magnesium stearate and that is why Geoff Clark, the founder, invested in expensive specialized equipment.
• SHRC is the only company that guarantees that Dr. Clark’s favorite product, Black Walnut Hull Tincture – From Green Hulls, is green in color. We offer this guarantee because this is how Dr. Clark wanted the tincture prepared and we also know that when the tincture is green it contains up to 10 times the amount of Juglone, which is the essential ingredient in the tincture.
• SHRC is also the only company that Dr. Hulda Clark entrusted to build the Whole House Filter.
• We at Dr. Clark Store back up our Quality Guarantee with investments in our in-house lab that features the best scientific equipment to test for Heavy Metals, Identity and Microbiology. We use both Dr. Clark’s and cGMP test methods.
• We buy all of our materials from reputable vendors here in the U.S., never from foreign countries. This ensures maximum quality and potency for all of our products.

Nineteen Quality and Purity Protocols

  NSF Certified GMP Compliant
No Flow Agents
Solvent Free
No Ingredients You Can't Pronounce
Chemically Pure

Identity Analyzed
Heavy Metal Tested
Batch Metal Tested
Tested for Microbes
Frozen for Sanitation
Auxiliary Biofeedback Test
No Hidden Ingredients
Compounded Responsibly
Wild Crafted, Organic
Whole Herb
No Tablets
Only Pure Capsules
Made in USA and Sourced in USA
Hand Crafted

NSF Certified GMP Compliant
All supplements under the brand names “Dr. Clark Store”, “Dr. Clark Purity” and “Vitamins Without” are manufactured in our own factory, which we have direct control over. Our very own Dr. Clark Store/Self Health Resource Center factory, known under the legal name Nutritional Supplement Manufactures, Inc. (, is certified by the National Sanitation Foundation (NSF).

In addition to all of the Dr. Clark manufacturing procedures, our processes are meticulous, detail oriented and geared to hinder mistakes. We have comprehensive SOPs, MBRs and MPRs. This ensures meticulous record keeping and quality assurance.

  1. SOP – Standard Operating Procedures
  2. MPR – Master Production Records
  3. BPR – Batch Production Records

No Flow Agents
Magnesium Stearate, a common flow agent, has increasingly been criticized for hindering absorption. Some research has been done on this and of course refuted by industry. We never use Magnesium Stearate in Dr. Clark’s supplements. Purity and Potency Go Hand in Hand.

For three reasons superior potency cannot be achieved without attention to supreme purity.  First, if you use flow agents the body has to work extra hard to break it down before enjoying the benefits of the nutrients delivered in the supplement. Second, micro toxins that are often found in highly processed excipients are poison to the body and makes the immune system, again, work extra hard. Both the above are devastating for a person with depleted immune system.  Finally nutrients should have no restriction to breaking down in the stomach for maximum absorption in the colon.

magnesiumstearate.jpg Take a look at this picture. The yellow part in the middle is the nutritional element; it has jagged edges and obviously will not flow very well.  This is why it has been coated with a flow agent, indicated in blue. This makes the particle flow fast without caking up in the encapsulation machine. This increases profits for the manufacturer because now he can run his equipment faster, but it is bad for you.

solventfree.jpg Solvent Free
We only use NSF “food grade” iodine, ammonia and grain alcohol to sanitize our equipment and table surfaces. It is common for other manufacturers to use industrial solvents such as laundry chlorinating bleach to clean their equipment. This is about the worst thing you can do. Laundry bleach contains heavy metals meant to get stains out of clothes. Another solvent commonly used in manufacturing facilities is Propyl Alcohol or Isopropyl Alcohol. Isopropanol is found in OTC rubbing alcohol (70% Isopropanol).  It is inexpensive and effective to clean with.  In fact, Propyl alcohol is used in many industrial grade and household cleaning supplies and even creams and lotions.
noingredpronc.jpg No Ingredients You Can't Pronounce
When looking under Other Ingredients on supplement labels you will find many hard to understand names of chemicals. For this reason, it is a good idea to read the label backwards. It is common to see tablets shine in bright colors. This is good for sales, and it may give you some pleasure when taking the supplement, but again it misses the main reason why you would take a supplement.
chempure.jpg Chemically Pure
Our supplements are not enhanced for flow, color, stabilization, and flavor. Think about it; if you take a supplement that is packaged with all kinds of chemicals, your body has to break down those chemicals. This takes energy away from your immune system. Run away when you see: Magnesium Stearate, Corn Starch, Hydroxypro­pyl Methylcell­ulose, Cellulose, Silicon Dioxide!
identity.jpg Identity Analyzed
The Identity and quality of our raw materials are verified by us in accordance with our cGMP SOP using both Syncrometer, organoleptic methods and lab equipment like FTIR, LOD and HPLC.

Heavy Metal Tested
All our incoming materials are tested for on an ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) for total heavy metals (metallic + plant based). Each product passes NSF, USP and the strict CA Proposition 65 standards when taken according to the label. Heavy metals are found naturally in plants in two forms, plant based and metallic. Dr. Clark was only concerned with metallic versions of heavy metals which she identified using Syncrometer® Testing, We of course continue Dr. Clark’s tradition with the able help of Syncrometer® testers she personally trained.

Lead Passed
Arsenic Passed
Cadmium Passed
Mercury Passed

Batch Metal Tested
In addition to testing our raw materials for Heavy Metals we metal detect every single capsule and every single grain of herb at the end stage of manufacturing. We use a metal detector from Safeline that swiftly reject ferrous, non-ferrous and stainless-steel contaminants in our products.


Tested for Microbes
We meticulously test all herbs for microbiological growth using our top of the line automated BioLumix and other systems. Our suppliers know better than to send us contaminated herbs, we only get the best available herbs because our vendors know we return all herbs that don’t test pure.  We also test our equipment and table surfaces. We guarantee that the product we manufacture meet the following criteria in accordance to USP or NSF standards:

Total Aerobic Count Passed
E. coli Passed
Salmonella Absent
Yeast and mold count Absent

Many herbs come from root vegetables.  Roots grow in the ground of course, and what else is in the ground?  Bugs galore!  Lots of them! One gram of natural soil, about enough to cover a nickel, contains up to a billion organisms. You are better off with our supplements, because you don’t have to waste your precious immune power on battling microbes hiding in your herbs.

frozensanit.jpg Frozen for Sanitation
All our herbs are frozen in special commercial freezers – in accordance to Dr. Hulda Clark’s requests and specific directions – in order to kill potential microbes found on herbs. Dr. Clark emphasized the freezing because as she explained, and I paraphrase - herbs are consumed raw and unwashed because the consumer can’t wash them as they would for example a potato, this is why they rely on the manufacturer to supply them exceptionally pure herbs.  This extra attention to microbiology on herbs is especially important to those with challenged immune systems.

Auxiliary Biofeedback Test
We use Dr. Hulda Clark's Syncrometer® testing method to help us secure raw materials that meet the Dr. Clark protocols. We test if the items are “negative” for the following contaminants:

Laundry Bleach Benzene Isopropyl Alcohol 17 types of Dyes
50 “Metallic” Heavy Metals PO and U Oleic Acid 3 types of Molds

This method of testing is a bio-feedback test - not approved by FDA. We do this test for educational and research purposes only.  The Syncrometer® test is based on a biofeedback between the tester and item tested.*


No Hidden Ingredients
It is a common misnomer that if you take a certain mg amount of a supplement that it does not matter in what form it is, how it is packaged and with what it’s packaged. Take Vitamin C for example. You can get it in many forms and some are more absorbent than others. Even if you see “Ascorbic Acid” on the label of two different products, the ingredients can vary. One manufacturer may use 90% Ascorbic Acid with 10% Corn Starch and Lactose (for better handling in manufacturing).  Of course a manufacturer that focuses on purity will use 100% Pure Ascorbic Acid.  Unfortunately, this is true for lots of ingredients, including the following:

Our Raw Materials

Other Manufacturers' Raw Materials

How it's reported in the supplement facts box

Pure Ascorbic Acid

90% Ascorbic Acid, with 10% Corn Starch and Lactos

Vitamin C

Pure Vitamin D

0.1% Vitamin D dilution in a base of Dicalcium Phosphate, Lactose, Acacia, BHT, Sodium Benzoate, and Sorbic Acid

Vitamin D

Pure Riboflavin

33% Riboflavin, with Mono- and Diglycerides of Fatty Acids surrounding each particle for better flow and flavor maskin

Vitamin B2 (as Riboflavin)

Pure Vitamin B12 as Cyanocobalamin

Cyanocobalamin (0.1% B-12 dilution in a base of Corn Starch with Sodium Benzoate and Sorbic Acid)

Vitamin B12 (asCyanocobalamin)

Pure Biotin

1% Biotin diluted on a base of Dicalcium Phosphate, Lactose, Sodium Benzoate, and Sorbic Aci


Pure, Undiluted Pepsin

Pepsin, standardized with Lactose


Pure, Undiluted Pancreatin

Bromelain, standardized with Lactose


Pure, Undiluted Bromelain

Bromelain, standardized with Lactose


Pure, Undiluted Papain

Papain, standardized with Lactose


The worst thing is if you are buying from a “manufacturer” that does not manufacture their own products, he may not know exactly what’s in the supplements. Contract manufacturers typically don’t disclose such information and will even substitute “similar” ingredients into the mix if they run out of a particular raw material – without telling anyone!

formulation.jpg Compounded Responsibly
Dr. Hulda Clark taught us that both herbal and nutraceutical formulations alike should contain efficacious amounts of each compound. Not a “fairy-dust" quantity of many items. This is the opposite of what you see on the marketplace today. Dr. Clark explained that each herb sends a particular signal to your body through bio chemistry – each ingredient has a unique effect on your body.  This is why that if you take a lot of herbs and nutraceuticals at the same time those signals can “confuse” the body and cause specific effects to be lost. 
organic.jpg Wild Crafted, Organic
We always prefer to buy organic or wild crafted herbs.  An herb is Wild Crafted if harvested from “untouched” nature without use of pesticides. In the rare case we don’t secure Organic or Wild Crafted herbs we do what we always do; reject the materials if does not pass our quality control process.  Our suppliers know by now not to send us anything but the best or we will send it back.

Whole Herb
Dr. Clark did not want people with depleted immune systems to use extracts because extracts are often highly processed. Invariably Dr. Clark would find contamination from the extraction process in the herbs.
Dr. Clark explained to us that the more an herb is processed, the greater the likelihood of incorporating pollutants in addition to leaving out wholesome nutrition. That is why we use the whole herb such as wormwood in our herbal supplement products.

“The complex, mulicomponent mixture obtained after using a solvent to dissolve components of the biomass. Extracts may be in dry, liquid, or semi-solid form. Excipients may be added to extracts to adjust the concentration, enhance stability, limit microbial growth, and improve drying, flow, or other manufacturing characteristics" -- Definition of “extracts” from a dietary supplement association.

notablets.jpg No Tablets
We don’t press our nutraceuticals into tablets. Making tablets requires that other ingredients be added, in addition to just the nutrients. Binders, lubricants, coatings, disintegrants, and other excipients are the ingredients most commonly added by tablet manufacturers.

Only Pure Capsules
The more you process something, the more likely you are to contaminate it.  This holds true for veggie caps.  It is much harder to make sturdy capsules out of vegetables than to make it out of animal products.

It is counter intuitive; many people erroneously think that everything vegetarian is healthier, but that is not the case.  I respect people that don’t want to eat animals but it is counterproductive to paint all vegetable based food as healthy.  A good example: highly processed tofu hotdogs.

The same principal applies to the vegetable based capsule.  It came on the market in the 1980’s when gelatin capsules had been on the market for decades. Only after complicated processing involving various solvents and chemical compounds can you make a vegetable capsule.

But aren’t gelatin capsules made with bones that might carry “Mad Cow” prions?  No. Because not all gelatin capsules are made with bones.  We only use bovine gelatin capsules that are certified BSE free. Our gelatin capsules are also Halal and Kosher.

madeinusa.jpg Made in USA and Sourced in USA
We buy all our raw materials within USA from trusted vendors that we know have excellent quality control testing systems in place. We do not import any of our raw materials directly from China.
handcrafted.jpg Hand Crafted
We use slower manufacturing methods than most other companies in the industry. This enables us to provide safer, purer and more potent products than most.