The following was posted by Dr. Elmer Cranton on the Rejuvenation newsgroup, which is for persons taking human growth hormone (HGH) by sub-cutaneous injection, or persons interested in following the discussion. I copy these posts here with Dr. Cranton's permission, because of their value for others to read. - Ellis Toussier From Elmer Cranton, M.D.
Re: IGF-1 interpretation
The following must be considered when relying on IGF-1 reports:
1. I have found that laboratories are not always accurate in
testing IGF-1 (sometimes called somatomedin-C). Different methods are used by different labs and the results are not always
comparable. It is a mistake to believe that clinical laboratory
reports are always reliable. IGF-1 is a very specialized test. Unless a lab is large enough to have a substantial volume for that special test, calibration and standardization may not be
accurate. I have found that Smith Kline Lab, LabCorp Lab, and
King James OmegaTech Lab are the most reliable. That doesn't mean
that others may not also be good. But be suspicious of reports if
they don't make sense clinically.
2. IGF-1 is not HGH It is a metabolic breakdown product made
from HGH by the liver. IGF-1 has some hormone activity by itself
but HGH in its pure form has much broader activity. Because HGH
remains in the blood for only a few minutes before attaching to
cell receptors, IGF-1 is used as an easily obtained but partial
indicator. IGF-1 stays in the blood for a day or more. IGF-1
seems to be reliable as a guideline for internal pituitary
production, which is pulsitile over many hours. But people differ
widely in the amount of IGF-1 produced from HGH by injection. I
have seen patients with only mild increases in IGF-1 from
injected HGH respond quite dramatically, out of proportion to
IGF-1 figures.
3. The fact is that1 unit of HGH equals the total daily
pituitary production for a healthy young adult. Therefore one unit of HGH daily is a total replacement dose in old age, regardless of the IGF-1 followup. It is possible that more of the HGH taken by injection (once or at most twice daily) attaches to cells receptors in the body, perhaps more effective ones, and that less goes to the liver to be broken down to IGF-1.
4. I do not do routine follow-up IGF-1 blood tests in my patients for the above reasons. Those measurements have not correlated with replacement doses and vary widely from person to person. There is a wide variation in how much IGF-1 increases from person to person. This seems to have no significance to long-term benefit seen in my clinical practice.
THE DEGREE OF INCREASE IN IGF-1 DOES NOT SEEM TO CORRELATE WITH CLINICAL
BENEFIT. BUT THE LEVEL OF BASELINE IGF-1, BEFORE INJECTIONS BEGIN, AS A PRODUCT
OF SLOW AND CONTINUOUS PITUITARY RELEASE, DOES SEEM TO BE A RELIABLE INDICATOR OF HOW DEFICIENT A PERSON IS TO BEGIN WITH.
5. I know that for myself personally, each unit of HGH by injection raises my IGF-1 by 100 nanograms/milliliter (ng/ml). That is my own consistent measurement if the HGH is real and not counterfeit. Someone else may have a different reading, more or less, with no significance to benefit. I am 67 years old and my baseline IGF-1 without replacement is approximately 100. Every time I get a new lot number of HGH for my patients I take one unit daily for one week and test my IGF-1. It should be about 200. I then take 2 units daily for several days and test again. It should be about 300.
That is the only way I can be sure of getting the real thing. Over the past 2 years I have twice received counterfeit HGH, properly labeled and otherwise indistinguishable from the real thing. When I tested my IGF-1, it remained at baseline.
I now use Lilly Humatrope in my practice. It has a foreign label but is made in France in the same factory as the USA product. It has consistently been the best in my own testing. IGF-1 measurements will also vary by 10% to 20% from day to day normally. And if a single blood specimen is split into two test tubes and sent to the same laboratory, the results may differ by 20%. The test method is only that accurate. Variations between different labs may be even greater. That fact must be considered in interpretation.
6. HGH replacement therapy means replacement therapy for deficiency with aging. Young people produce plenty of their own and young adults also respond much more briskly to precursors (various amino acids). When reading claims for precursors of any type, it is necessary to know if IGF-1 was deficient to begin with. I would ask to see results for a series of 10 patients over 70 years old (whose IGF-1 will be around 100, plus or minus) and then get before and after readings. They must be 10 sequential patients, not the best 10 responders out of 100, as may be deceptively done. On the average I have only seen about 25% increase of IGF-1 with amino acids in such patients. And to get that increase it is necessary to have an empty stomach, no food for several hours before and 2 hours after taking that product. Food competes with the amino acids for absorption. It is necessary for amino acids to go in fast without interference from other foods to boost HGH release. Young people who do not need HGH and who will not benefit from more will increase much more with the amino acids than old people who really need it.
7. It is well known that HGH releasers (peptides, amino acids, releasing hormone, etc.) lose there effect over time. The pituitary becomes tolerant to them and releases less and less HGH over several months. They work best short term, best in young
people who don't need the benefit and lose their effect with
time.
Elmer M. Cranton, M.D.
> From: "Dale R. & Karen A. Hersh" > Dear Dr. Cranton,
> Thank you so much for you information, but I do have one
question reference point 5: Do you regularly use rHGH and if you don't why? -- And if you do -- do you cycle it?
I regularly take one to two units of rHGH daily, every day. I've done that for 3 years now with good results. I do not cycle it.
Cycling can save money and get more bang for the buck, but has
reduced overall benefit.
E M Cranton, MD
From: "Elmer Cranton, M.D."
Subject: IGF-1 Laboratory Tests
I did a comparison study of IGF-1 test results by sending split specimens to several large, very reputable reference laboratories.
I took a single blood specimen, I split it into two tubes and sent them to two different laboratories. Theoretically the results should have been the same. There was a correlation but also large differences.
The results follow:
The two test results are on the same, identical blood specimens.
The laboratories are large, highly reputable, fully licensed
labs, approved, and regularly inspected by the government. This
cost me some money as each test cost more than $60. But I felt it
was necessary to correctly interpret my patients' results.
When you see IGF-1 figures used in marketing, you should keep the below results in mind. Any such figures mean nothing unless the standard deviation of the method used is known and enough tests are done to get a statistically significant difference. A you can see, differences of 25% to 50% are within the error of the method and can be quite meaningless.
It is also easy for a marketer to select the most favorable numbers and discard those that do not favor a product. How can one be sure this is not done? Unless the research is done independently, by a researcher with nothing to gain or lose form the results, such studies are always suspect in my mind. If a marketing company pays for research, will the researcher bite the hand that feeds him/her???
IGF-1 on same specimen, ng/ml
LAB A
LAB B
140
186
236
301
97
124
124
125
98
131
215
284
250
406
97
124
126
169
67
89
180
331
200
379
66
133
261
143
424
546
103
159
175
215
So I repeated the test with another two labs, to see if it was
just the above two labs or a consistent problem.
LAB C
LAB D
177
174
165
84
255
381
222
208
57
24
132
60
133
31
I am now repeating this test by sending samples of the same blood
to the same lab on different weeks to see the differences in
results using the same lab both times.
So far the results are similar to the above, although the
differences are less.
Elmer M. Cranton, M.D.
Dale comments on the above results:
From: "Dale R. & Karen A. Hersh"
Subject: Re: IGF-1 Laboratory Tests
At first I looked at this as though these results show that testing IGF-1 was probably useless and this bothered me. Then I started looking at them a little closer and saw quite a bit of consistency. Lab B was mostly higher than A and when I put a calculator to the results, 10 of the split samples differ the same ratio .77 +/- .03
4 more had similar ratios, but at .55
Actually, these are pretty consistent results. It seems like it's more a question of calibration (if there is such a thing for IGF) or even who ran the test.
Depending on what days these results were run, there is more consistency than appears to be the case at first glance... A few
were completely off and I can't explain that without more information. So using the same lab may be the answer if one is going to get their IGF tested.
I couldn't see any correlation between C and D.
Correlation of IGF-1 and Prostate Cancer
A good study has shown that a large number of elderly male patients
taking HGH over a long time had no increase in prostate cancer.
That rumor got started when it was reported that elderly men with
the lowest quintile of IGF- (lowest fifth of HGH) had less cancer
than men with the highest 20% (highest fifth). There was no
linear correlation of IGF-1 and prostate cancer in the study.
They only reported less cancer in the most deficient of an
elderly population.
What that report did not point out was that the lowest fifth were
so deficient that all tissues of the body were inhibited in
growth, healing and maintenance-- healthy as well as cancerous. It
is quite a different thing to state that deficiency of essential
hormones slows the growth of cancer (and everything else
including a healthy body) and, on the other hand, trying to prove
that hormones cause cancer. Life and health cannot progress
without hormones. Cancer cannot progress without a living body to
support its growth. It is quite predictable that if old people
are dying from end stage deficiencies, they might have less
cancer.
If all of the facts were reported, it is my opinion that the most
senile and debilitated of the group would also have been those in
the lowest 20% of IGF-1. But that data was not presented.
If HGH is only replaced to an average level present in the body
for 30 years, from age 20 to age 50, and if it was safe during
that 30 year period, and if it was essential to health during
those 30 years, what is the harm in replacing it after age 50
when it becomes deficient? If it's dangerous, why does it not
cause problems in the earlier 30 years when it is normally
present in the same levels or higher from pituitary production?
(Note: Excessively high doses of hormones can be harmful, I am referring here only to normal replacement doses).
E M CRANTON, MD
For more information on Dr. Elmer Cranton's EDTA Chelation Therapy or growth hormone replacement therapy, go to: www.drcranton.com.
Dr. Cranton's Replies Answers Questions referring to Growth Hormone (rHGH) Replacement Therapy!
About Me: My name is Ellis Toussier Bigio. I am "The Amazing Dirty Old Man WHO DOES NOT GROW OLDER..." with emphasis on "who does not grow older" because that is what is most important. In August, 2007, I am 62 years old and I think I look and feel as if I am about 45... I honestly think I might be the healthiest, sexiest, and youngest 61 year old man in history, because nobody before me has ever done what I have been doing since I was 20 to stay young and healthy... and sexy. The fantastic hormones which I am now using and many of the anti-aging therapies that are so good for my health simply did not exist before 1985.
I live in Mexico City, where I am free to buy and sell and teach others around the world to use legal and good hormones, under the supervision of good doctors. I am not a doctor, but many doctors think I know my topic so well that they pay me to consult with me... Some doctors call me "colleague"... and other doctors call me "The Madman in Mexico..." (I prefer "The Madman in Mexico" because people accept that a madman might think differently than they do...) NOTE: I only use and sell LEGAL medicines. Everything I sell is registered with the F.D.A., or Salubridad in Mexico.
I like to think of myself as "the King of Growth Hormone," "the Father of EPO to prevent senility and age related loss of muscle and mobility" and... "the Father and the Mother of using Insulin for non-diabetics to prevent diabetes and aging."
I hope you will think I am "The King" and not "The Madman in Mexico"... but if you do, that is fine with me... He that laughs last, laughs best, and I have no doubt in my mind that I will have the last laugh.
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"I want to express my feeling of deepest gratitude to you for teaching me about the significance of EPO. I learned about EPO first from you. Initially I did not pay much attention to it.
What happened to me about two years ago when I was 88, was sudden mysterious anemia (hematocrit 35-38%). My doctor did not worry about my anemia... He said it is mild and stable, there is nothing to worry about... but I felt terribly weak... I felt like I was dying.
Reading what you have written about EPO on Rejuvenation, I asked another doctor to write a prescription for EPO. The results are beyond description. A Miracle! Now I feel stronger... much stronger than I was 10 or more years ago. Now I think better than before, and I publish better books and papers than before.
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With kindest regards,
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Professor of Linguistics, Yale University
July, 2006
Hi Ellis,
"You might remember me. I am the 66 year old Phoenix firefighter that has the hyperbaric chamber that I use for mountain bike racing. I also let ill
people use my chamber ( for $5.00 which is the actual cost to operate a high pressure oxygen chamber for an hour) that can't afford to go to a hyperbaric oxygen center. I myself have done over 400 dives in the 3+ yrs that I have had the chamber. I owe it to you Ellis to explain what I know because I learned almost everything I now know (including the benefits of hyperbaric oxygen) and about staying healthy from years of following your advice on Rejuvenation."
- Frank Lively
Phoenix, Arizona
July, 2006
Hi Ellis,
"I've been a student of health and longevity for all my adult life. I used to own a health/herb store and used to teach herbal healing. I'm fairly knowledgeable about both natural healing and some areas in the fields of medical science, having worked as a biomedical engineer for over 12 years.
I've been a member of Rejuvenation for several years, using many of your suggestions like monitoring blood glucose and using HGH, among other things, both of which have made a big difference for me.."
- Scott Brown
Northern California
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