Welp, it looks like the Cum Volume / Holy Grail Thread died. This is my attempt at a revival.

My recommendation on the Holy Grail, every day take:

1. Soy Lecithin - 1200 mg x2
Single most important additive for volume increase. If nothing else, take this religiously. You may be able to increase dosage after some time as well.
2. Pygeum - 100 mg x3
This can rapidly and greatly increase precum. Minimally increases cum.
Get it WITHOUT Saw Palmetto, a common additive that has next to no benefit, unrelated to volume improvement, and has some possible negative side effects.
3. Zinc 50 mg x1 or x2
DO NOT take more than the recommended dosage. This supplement is vital to sperm production. Most people get enough zinc with a balanced diet. Taking more zinc than necessary will not equate to more sperm; this supplement just makes sure your body makes as much as it naturally can rather than being short in one key area.

Other drugs / supplements that may or may not be beneficial:

1. Amino acids (L-Arginine, Taurine, Cysteine)
Effects on sexuality are highly indirect. Certainly not going to give you the results of the other supplements.
2. Maca
Frequently expensive, the multiple sub-species/variants have different effects and are hard or impossible to distinguish until you open up the product. Again, results are substantially less than other products.
3. Horny Goat Weed
Likely able to help Erectile Dysfunction, but unrelated to volume.

Whatever you decide to take, you will need to take it diligently for about two weeks straight. You can easily find everything at Amazon.com.

I've had approx. a 25-50% volume and maybe 25% sensitivity or pleasure increase. Any other reports from /d/?