what is a normal igf1 blood level count? 50?
The ranges in Blood Testing for IGF-1 depends on your age group since pubertal and young teens can have very high levels compared to a 40 year old.
Common ranges I have seen around the web:
Age.............Female...........Male
12-15 years 187-676 ng/mL 108-558 ng/mL
16-17 years 143-603 ng/mL 182-532 ng/mL
18-24 years 128-488 ng/mL 158-497 ng/mL
25-29 years 89-397 ng/mL 112-402 ng/mL
30-34 years 71-352 ng/mL 89-350 ng/mL
35-39 years 63-330 ng/mL 77-323 ng/mL
40-44 years 58-318 ng/mL 70-307 ng/mL
45-49 years 54-307 ng/mL 66-296 ng/mL
50-54 years 49-292 ng/mL 61-285 ng/mL
55-59 years 42-272 ng/mL 56-271 ng/mL
60-64 years 35-248 ng/mL 50-255 ng/mL
65-69 years
70-74 years 22-204 ng/mL 38-223 ng/mL
75 years + 21-199 ng/mL 35-213 ng/mL
A note on IGF-1LR3 being "seen" in a blood test. IGF-1LR3 has the same binding affinity for receptors as human IGF-1, thus it is reasonable to beleive that the reactive reagent used for the Blood Test would have the same affinity for both types of IGF-1 as well... Just my thought on it.