I'm currently experimenting with Leptin so I'll shed some light on this...
- Its VERY expensive.
Real leptin from a legitimate supplier will cost you the equivalent of $200-300 for a 200mcg vial.
Now consider the fact that the studies dosed leptin at 10-30mcg/kg and you will see just how expensive this is going to be.
For example, at the moment if I was to use leptin daily it would end up costing me $600 PER DAY.
- There is NO set dosing protocol.
Although the 10-30mcg/kg dosing is what has been used in general, these studies included obese individuals - so your going to have to do a lot of experimenting with the dose.
Your also going to have to spend a lot of money on bloodwork to see where your leptin levels are (since they need to be above a specific point to reap the benefits) and make dosing adjustments accordingly.
- Its only useful for already dieted down individuals.
If your simply looking for another compound to help lose weight, then your wasting a lot of money if Leptin is the route you opt to go for.
Considering all of this, for most people Leptin simply isn't a viable option