Prohormone & Supplement Ingredients:

19-norandrost-4-ene-3,17-dione

Some confusion here, as I also see this compound referred to as:

19-norandrost-4-ene-3,17-diol
19-norandrostenedione
4-estrene-3,17-dione

These compounds are analogous to the andro products androst-4-ene-3,17-dione and 19-norandrost-4-ene-3,17-diol, except that they convert to nor-testosterone instead of testosterone.

Since nor-testosterone is less androgenic than testosterone, the anabolic/androgenic ratio for the nor products is higher than for the andro products.

As you can tell from above I don't think much of androstenedione. It's nor analogue, 19-norandrot-4-ene-3,17-dione (19-Nor, NorAndro, many other names), may be a better product.

The anecdotal evidence (take that for what it is) suggests that 19-Norandro may be useful. Again, with any of the "-diones", it is a good idea to avoid large dosages.

Curiously 19-norandrost-4-ene-3,17-diol has not caught on as much as it might have. The cost (vs. 4-AD) may be the reason. "Nordoil" is often taken in combination with androdiol (androst-4-ene-3,17-diol). This combination has become quite popular.

A precursor of the anabolic steroid nandrolone. Until 2005 19-Norandrostenedione was available without prescription in United States, where it was marketed as a prohormone, but it is now classified as a Schedule III drug.

19-Norandrostenedione is readily metabolized to nandrolone after oral administration, but its potency to transactivate the androgen receptor dependent reporter gene expression is 10 times lower as compared to dihydrotestosterone (DHT).

Scientific studies have shown that oral administration of 19-norandrostenedione is "a very ineffective strategy for stimulating skeletal muscle mass increases but may be associated with side effects".
Supplements with this ingredient:
None (for now)

Links to additional information on 19-norandrost-4-ene-3,17-dione
19-Norandrostenedione (Added on 5/18/2012)
An Overview of 19-Norandrostenedione (Added on 5/18/2012)
19-Nor Prohormones (Added on 5/18/2012)

only members can suggest new info links