[decimon]

SeMet is methionine (an amino acid) with the sulfur replaced by a selenium. MeSeCys is cystine (another amino acid) with the sulfur replaced by a selenium.

Thanks.

Just to be certain, neither occurs naturally, right?

[sima_yi]

The selenium versions may occur in trace amounts. The way selenium poisoning works is the sulfur in the body’s proteins (which contain methionine and cystine) gets replaced with selenium, and no longer function properly.

[dila813]

Reading another article, it says that MeSeCys can be fortified into normal plants by doping the soil or using a hydroponic system.

I couldn’t find MeSeCys in any natural occurring plants you can buy at the grocery store.

Maybe someone will pipe up that I am wrong.

I thought Kale has it, but couldn’t verify if my memory is correct using google.

[PeaceBeWithYou]

The Cystine is the naturally occuring form. Grape seed extract is the easiest way to supplement it.