I'd have a bunch of questions to figure out what would be best for you. Are you chasing long term or short term gains? LR3 can be a fantastic tool to help with very short term gains, and from a non-ped perspective it will give you the best short term gains. HGH over a long term or ongoing use is going to help provide body recomposition, some healing, and better sleep.
If you want to focus on the short term gains from LR3, it works best if you stack it with PEG-MGF. The two together maximize the potential short term gains.
For clients that I work with that don't want to do PEDs yet, this is the protocol that I have them run to get short term gains. It's important to note that you want to inject after training and consume with protein and simple carbs to increase saturation in the muscles.
Run IGF-1-LR3 at 50 to 100 mcg every day, and PEG-MGF every 3rd day at 300 to 500 mcg. IGF-1-LR3 has a long half life of 20 to 30 hours however daily dosing is done for receptor signaling, not blood levels. Dosing daily to create a new signaling pulse rather than relying on leftover levels. Daily dosing creates repeated pulses of satellite cell activation, mTOR signaling, and nutrient uptake. By doing this it keeps the muscle in a frequent growth signal environment during the cycle. So 50 to 100 mcg daily. The same concept applies to PEG-MGF, but the reason dosing is less frequent is a little different. Unlike IGF-1 LR3, PEG-MGF’s main job is to trigger satellite cell activation, which happens in a short signaling window after muscle damage (training).Once that signal is triggered, giving more immediately doesn't add much. So frequent dosing isn’t necessary. So 300–500 mcg every 3 to 4 days. PEG-MGF actually works best when IGF-1 is present later, because the satellite cells it activates still need IGF signaling to become new muscle fibers.
Feel free to DM me if you have any questions or need some help.