1
00:00:00,000 --> 00:00:05,083
IGF-1 LR3, also called Long Arg3 IGF-I, is an engineered analogue.

2
00:00:05,083 --> 00:00:10,167
Its sequence differs from natural IGF-1, so the exact molecule matters.

3
00:00:10,167 --> 00:00:16,417
An early study compared these analogues in cell models and examined interactions with IGF-binding

4
00:00:16,417 --> 00:00:21,500
proteins. Those experiments help explain laboratory activity, not clinical muscle gains.

5
00:00:21,500 --> 00:00:27,375
Mecasermin is a different prescription product with FDA-approved uses for specific pediatric growth

6
00:00:27,375 --> 00:00:32,833
disorders. Its approval does not establish an approval or benefit for LR3.

7
00:00:32,833 --> 00:00:36,708
Changing a growth-factor molecule can change its behavior.

8
00:00:36,708 --> 00:00:42,958
Evidence must match the exact compound, outcome and population before laboratory potency becomes a

9
00:00:42,958 --> 00:00:46,458
clinical claim.