Hello, cheers for the information just received. This is the description I found on a website, L-Tryptophan pure powder, free base form, with US Pharmacopeia (USP) Quality. It is pharmaceutical quality grade. There is not any additive or filler inside. Manufacturer assayed as 99.65%. It is fresh enough for use.
However, I feel yours might be better quality, can you explain how so comparing the description above. What do you feel about adding C0q10 to the recipe? Any chemical understanding and information would be greatly appreciated. How much would 1kg of tryptophan cost plus shipping.
Hello Felix, and thank you for your questions.
Here are just a few of our views and the statements that we make about quality.
"It is well-known that European pharmaceutical standards for L-Tryptophan are far higher than U.S. or Japanese standards. The Europeans take safety seriously, as we do at Lidtke. The European standard not only demands testing for known toxins that are ignored in the U.S. and Japan, but European standards have much lower limits on contaminants, overall. Although many products claim to meet pharmaceutical standards, clearly not all pharmaceutical standards are the same - not even close.
From our beginning in 1994, it has been our crusade to meet the highest standards in the world. We question the quality-control documentation we receive, and we look beneath the surface. Contamination of every kind, world-wide, continues to increase, and it takes work to keep up. That is our job: to stand between you, our customer, and the nearly incomprehensible chaos of the world, and to look out for your interests, your health and your safety.
Also, "A point that rarely receives much notice is the cosmetic reworking of amino acids to make them appear "pure". There are milling and whitening procedures that often are applied just to make amino acids sparkle and have that bleached, pure look.
Manufacturers know that consumers often judge by appearance, but what consumers may not know is that reworking a nutrient to improve appearance can actually degrade the quality of that nutrient.
If a crystalline ingredient has never been "flattened" to give it that shine, you will end up with a cleaner, but fluffier material that probably takes up more space in a capsule. In turn, this makes the encapsulation process much slower, more labor-intensive, and more expensive. In the end, though, by taking the extra time, you avoid the mistake of introducing contaminants into your product simply to improve the appearance."
Another factor to keep in mind is the general un-reliability of laboratory results, as presented on a certificate of analysis. As one independent laboratory owner explained, manufacturers shop around for laboratories that will give them high results, so the manufacturer can show impressive results to their customers. All the laboratories know that if they test ingredients and the results are low, the customer often will not come back. So, in order to keep customers, a laboratory may recalibrate their equipment or testing methods to give higher readings.
To give one of many examples, about one year ago we sent three samples of L-Tryptophan - each from a different source - to an independent laboratory in order to compare assays. The results that came back had all three samples above 100%. Now, there always is a margin of error in testing, and for this reason an assay can sometimes be over 100%, but for all three to have an impossibly-high result seemed remarkable. It happens that all three manufacturers were among the very top-quality producers in the world, and they really did not need any "extra help" from the laboratory.
In regard to pricing, I will get back to you soon with a price for one kilogram. We used to have the one-kilogram size on our price sheet, so I will go back in our records to find the pricing.
In regard to CoQ10, CoQ10 tends to be fat soluble, so mixing it with chocolate that has a high fat content - as you suggest in your other email - might actually improve the absorption of the CoQ10.
I hope this information is helpful. Let us know!