The colostrum that I acquired from Goodhealth Naturally NZ
in New Zealand did not improve my condition. But I had a lengthy email conversation with a naturopath that represented the company and was told that colostrum may not be whole and likely has had some important components removed from it for resale as a different product. They promote the main IgG component which should be good for pathogen reduction. She would not say that they may have extracted components however she did mention that they sold a concentrated product containing proline rich polypeptides (PRP's) which are derived from colostrum and so I think it is safe to assume that their colostrum is not whole if they get both from the same supplier/manufacturer.
Here's an excerpt from my converstaion with the naturopath
Our New Zealand colostrum in the 100 percent Colostrum powder adheres to the following. There are very strict standards in the New Zealand Dairy industry; the governing body for this is the Ministry of Primary Industries (MPI). New Zealand colostrum is collected only from pasture-fed cows which are free from antibiotics and growth hormones. The quality and consistency in the manufacture and supply of our colostrum is assured. The colostrum is collected and stored in refrigerated vats and then it is flash pasteurized. Low heating processing retains the biological activity (poor practises of colostrum collecting may freeze the colostrum and then pasteurize with high heat, which can damage the protein molecules and may inhibit the integrity of the active components of the colostrum).
Being "100%" does not mean it's the whole product. "100%" may mean that there are no additives.
It likely was the PRP's that were extracted to be used in an allergy spray. The PRP's are immunomodulating which are supposed to help with balancing the innate and adaptive immune system thus reducing autoimmunity and autoinflammation.
We did used to do a concentrated product of PRPs from colostrum called Immunonlox but no longer manufacture it sadly due to the balance of manufacture and customer demand, But was a great product regarding auto immunity support and we had good feedback.
The same is probably true regarding the growth factors (CAGF or CBGF). There are many other components such as lactoferrin, lysozyme and lactoperoxidase. They do list the amount of lactoferrin that is in their product (0.1%) but it is ten times less than what a competitor states. So I would presume that it was also mostly extracted for medical profit purposes.
It is possible that the amount of some components is not stated because of the cost of analysis. But considering how much they probably can make on a single batch then I would imagine that the cost won't hurt profits too much.
It is a New Zealand brand and a colostrum producer, Doug Wyatt, that now resides and manufactures his brand in USA tells his story
about why he manufactures it and how as the NZ government took over the company he formed the quality went down. So he moved himself and his business (Sovereign Labs) from NZ to USA.
Sovereign Labs does much testing which includes looking for pathogens, before and after pasteurization. On one batch they stated that the growth factors -- IGF1, EFG, TGF-Beta1&2, VEGF -- averaged 1.8%. I have seen it vary from batch to batch; but they do tests and state its presence which just makes me think that competitors won't state the composition because the components have been removed.
If I try colostrum again then I would use Doug Wyatt's Sovereign Labs brand
On a related note I was at a supermarket and wanted to buy "sea salt." I picked up a package and read the list of ingredients. There were additives such as table sugar, a chemical as an anti-caking agent, and one or two more. These days it is hard to get a whole product that hasn't either had junk added or the good stuff removed!!
If you have tried colostrum and had results please add to this thread.
I hope this helps.