At Lidtke we recognize the danger presented by allergens like gluten, yeast, wheat, dairy, eggs, and artificial colors and flavors. All of our ingredients are certified by the manufacturer to be free of these common offenders.
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The Tryptophan Wars - The truth about contaminated Tryptophan on the market, the FDA ban, and making the highest quality Tryptophan on Earth.
Interview - Dr. Jarowski discusses his years of research into blood sugar.
The Secret World of Supplements - Ron Sturtz
Townsend Letter, September 2003 - Doctors Discuss Superb Benefits of L-Tryptophan
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The Lidtke Letter - Our Free Newsletter
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Lidtke is a leading supplier of premium L-Tryptophan and specialty supplements for occasional sleeplessness, stress, a relaxed mood, maintenance of healthy blood sugar, liver cleansing, and more.
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At LIDTKE we literally search the world for premium raw materials that even surpass pharmaceutical standards. Such attention to detail is seldom available through mass production; hence, we are a specialty manufacturer, and we are happy to take time with our customers.

We always are looking for new ways to improve and respond to our customers’ needs, so if you have suggestions,

please give us a call on our toll-free number: 800-404-8185,
or send an email to:

When we answer the phone, we are inviting friends and strangers, alike, into our home. We do not rush you out the door... so please feel at home to ask about our products and how we make them. We are proud of what we do, and we are here 7am to 5pm from Monday through Friday to help in any way we can.

Dr. Charles Jarowski amino acid dietary supplement for blood sugar
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Brain Inflammation and Memory
by Dr. Laura Lambert
A few of my students recently have been discussing memory and focus, causes of poor recall/focus and their relationship to conditions like Alzheimer’s diseas...
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by Dr. Laura Lambert
By now we have all [hopefully] heard of antioxidants, how we NEED antioxidants for health, and maybe even how the protect us from things like the sun or even...
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The Skinny on Sleep
by Dr. Laura Lambert
Are you sleeping enough to keep thin? It is an interesting concept as most Americans do NOT get adequate sleep and we happen to be a country full of obesity....
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Gluten Free by Choice
by Dr. Laura Lambert
All of my friends/family are aware that I don’t eat gluten. Many of them also find it tedious and annoying. I have learned to embrace their playful jabs of c...
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Why Don't Your Supplements Work?
“Why don’t amino acids always work the way they claim?” It’s a good question that has confused nutritionists for decades, and it can apply to all amino acids...
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L-Tryptophan AND 5-HTP, a Comparison
L-Tryptophan is the essential amino acid from which your body produces 5-HTP, Serotonin and Melatonin and a wide array of structural proteins, enzymes, and o...
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A Great Scientist's Message
Dr. Charles Jarowski, Ph.D. was the first Director of Research and Development at Pfizer Inc. and became renowned over the next twenty years as he authored a...
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Nuclear Countdown for Japan
The computer image below of the Pacific Ocean produced by a team of oceanographers at the GEOMAR Centre in Germany, shows the estimated spread of radioactive...
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Townsend Letter Benefits of Tryptophan
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At Lidtke, we manufacture nutritional supplements that are kind to your body and your soul – using only the richest, cleanest natural ingredients that we test ourselves for impurities.

In everything we do, we strive to restore life and health, and we value and honor those who share our philosophy.

Our mission is to educate, enlighten, and share our knowledge base with everyone in our community, and we encourage all of our customers to do the same.

Many dream about making the planet a better place – only a determined few dedicate their lives to actually making it happen.

When it comes to nutritional supplements, there are hundreds of details that must be controlled to attain the highest quality, and as a manufacturer you truly have to believe in your work to spend decades refining the procedures and identifying the best suppliers needed to achieve such high goals.

We, at Lidtke, are a specialty manufacturer and in order to live up to our philosophy, we take the time to understand each ingredient so that we can discern small but important differences in quality.

As worldwide levels of radioactive nuclides, heavy metals, solvents, pesticides, herbicides and GMO ingredients continue to increase, the challenge to live a healthy life, we believe, becomes a worthwhile priority.

Be well in mind, body, and spirit!

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We Thought You'd Like To Know...

At Lidtke, we are concerned about contaminants, the kind of organic and inorganic chemical contaminants, including solvents, fumigants, and heavy metals, that you may find in foods or supplements.

A few of the chemicals identified include acetone, toluene, hexane, ether, 1,2-dichloroethane, ethyl acetate, isopropyl alcohol, and ethylene oxide. These chemicals may, unknown to the bottler or consumer, be used in manufacturing processes.

Generally, nutritional ingredients are tested only for a few contaminants, and the other, untested toxic solvents, fumigants, pesticides and herbicides can be hundreds of times higher than safety standards.

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The average consumer, in fact, would be surprised how often such solvents and other chemicals are used in the manufacture of “natural” products. Toxic residues such as these are more commonly found in low-cost nutrients because manufacturers can dramatically reduce their expenses by leaving out critical purification steps. Sorry to say, such residues seldom can be detected by consumers, and their illnesses, years in the future, may never be diagnosed.

These are the reasons why we believe it is important to work with respected suppliers of ingredients and raw materials – those who share our commitment to purity and safety. Please feel free to mail us your suggestions!

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†As certified by the manufacturer.
*These statements have not been evaluated by the Food and Drug Administration.
These products are not intended to diagnose, treat, cure or prevent any disease.
Disclaimer: This website is intended for educational purposes only and is not intended to replace the diagnosis or recommendations of a health-care professional. The opinions expressed in this website belong to the author only.

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