No need to split the igf doseage in two. Once a day is sufficient. The reason that gh is typically split in two is due to its very short halflife. Igf has a much longer halflife. I've seen it said that you can run about 12.5 mcg's of t3 without suppressing your natural thyroid production for longer periods of time, so you could probably get away with stretching the 6 week time frame.