I'd imagine that if you're already healthy you'll see little difference.
In the health food world I think that things are touted as being super foods just to sell them. There doesn't seem to be any obvious research or studies into the claimed benefits.
And when a site, for example,
Here are some of the many health benefits wheatgrass has…
* Aids in the prevention of and fight against infections and improves the body's ability to heal wounds.
* Helps removes heavy metals from the body.
* Absorbs 92 out of the known 102 minerals from the soil.
* Helps with skin problems such as eczema or psoriasis.
* Chlorophyll in wheatgrass helps improve blood sugar disorders.
* Helps eliminate body odours.
* The high magnesium content in chlorophyll builds enzymes that restore the sex hormones.
* Helps prevent tooth decay.
* Chlorophyll in wheatgrass helps purify the liver.
* Arrests the growth of unfriendly bacteria.
* Is an energiser for body and mind.
* Great for constipation and keeping the bowels open.
* Is non-allergenic.
* Aids in the prevention and fight against cancer.
and the disclaimer
Information is provided on this website for educational purposes only
The information is not intended to be medical advice nor is it intended to suggest or offer a cure for any physical disease or condition.
You have to wonder.
If a product was so good it stopped you smelling, stopped your teeth going rotten and improved your sex life then Pfizer would be selling it.