ChicagoMusician saidI'm looking for an effective supplement to compliment my solid nutrition and workout program.
Any stand out recommendations?
You are nearly underweight now. I'd stay where you are, or higher.
Low fat is fine, but, you sure don't want to be getting any lighter. If you do so, you'll stop looking like a guy, and look anorexic.
Understand sub teen body fat percentages can be hard to hold for long lengths of time. Being less than about 6% for any length of time really starts to become unhealthy because you need some fat to maintain your organs in your core, and to help your cognitive function.
When you consume too few calories, without chemical warfare with your body (AAS, T3, ECA, Clen, etc.), your metabolism slows to a crawl: first, the protein goes (muscle loss), then, the fat, and finally your organs are consumed, and you die. You need to fuel the furnace to be able to perform properly in both physical and mental tasks.
If you want to get your fat very low for extended lengths of time, you need to get into chemical warfare with your body, and while you'll maintain muscle mass and be very lean, your lipid profile will look terrible. YOU NEED FAT in your diet, particularly monos and polys. Understand if you want to look like that guy on the cover of a magazine, you really can't go there without some chemistry which is not this board.
To be honest, I think most folks would say you could stand to GAIN some weight. You're very skinny now. A few pounds, in my view, would make you look a lot more like a guy.
Those guys on the front of the various magazines are almost always fully engaged in the chemical warfare that I speak of, and they keep that look for days, or weeks, at a time, but, some keep it on an ongoing basis, but, it can't be done without adding the extra stuff (in most cases).