It seems Jeremy Piven needs a lesson on moderation. First the star dropped out of his Broadway show due to an alleged case of mercury poisoning, which he blamed on 20 years of eating fish twice a day.

However, the playwright for the show, Speed the Plow, David Mamet expressed doubt in Piven’s diagnosis. “I talked to Jeremy on the phone, and he told me that he discovered that he had a very high level of mercury,” Mamet told the New York Post. “So my understanding is that he is leaving show business to pursue a career as a thermometer.”

Now, Piven is accusing another food of foul play. This time? Soy milk. The nutritionally challenged actor said he had picked up a 12-cup a day habit substituting soy milk in his breakfast cereal.

“I was the guy that dabbled in soy milk, but now I’ve found out soy milk has enough estrogen for me to grow breasts,” Piven told Empire Magazine. “It was a very confusing time.”

However, man boobs, or “moobs” are a real problem among American men. The condition is formally called gynecomastia, and can be caused by genetics, obesity, puberty, some prescription and illegal drugs, and alcohol.  In most cases, man boobs can be dealt with by quitting the medication that caused the condition, strength training or weight loss. Some rare cases may require male breast reduction surgery.

No worries for Entourage fans, though. A rep for the actor says Piven wasn’t serious. “[Piven's comment] was taken from a silly Q&A piece that he did for a U.K. [movie] magazine called EmpireHe said he used to drink soy milk, found out it had too much estrogen, made a funny remark about growing breasts and that was it.”

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Watch Entourage and it’s plain as vanilla: Jeremy Piven appears to have more hair than he really does. Piven’s status-hungry, super-agent Ari Gold shows a fairly full head of hair, though Piven in real life has less. This evidently all comes down to toupees, rather than a cosmetic surgery procedure, such as hair transplants.

Apparently, the real Piven’s hairdo can vary from day-to-day as well. Balding one day; hair-pieced, perhaps, a few days later — online photos prove that Piven likes to mix it up. It could be a matter of his given mood — or, maybe he sees the humor in the erratic appearance. (Others surely do.)

MakeMeHeal.com reported on Piven’s probable dependence on hairpieces, and compared him to John Travolta – another actor who apparently turned to the rug instead of a hair transplant. Like Piven, Travolta showed enough inconsistency in public to make it known that he has not given his thinning hair a permanent solution.

“John Travolta doesn’t look like he has had a hair transplant,” plastic surgeon Paul S. Nassif told MakeMeHeal.com. “It does look like he is wearing some sort of hairpiece. Unfortunately, although it’s likely an expensive system and requires a lot of maintenance, it’s not doing its job if the world can still see it as a piece and not hair.”

High-maintenance hairpieces seem to be the culprit for both actors, and that’s no crime. Piven could sell his work on Entourage with a shaved head. As for Travolta, as long as he spares us the sequel to Battlefield Earth, he can do whatever he wants with his hair.