Salvestrols and Diet
Research suggests that Salvestrols are produced by plants in response to fungal infection, and are therefore
most present at the sites where fungi are likely to attack. In fruits, this means on the skin, as the fruit
is ripening. Salvestrol compounds are also present on the surfaces of the roots of many plants, as the roots
are continually under threat from fungi in the soil.
However, it can be difficult to find food that is high in salvestrols. Different salvestrols are found in varying concentrations
and levels of biological activity in fruits like strawberries, oranges, grapes and even cocoa. There are over 550 varieties
of oranges, over 200 varieties of strawberries and grapes, and 450 varieties of cocoa bean! All with different
levels of Salvestrols, and each with different levels of biological activity.
The levels of Salvestrols in a typical "5 portion a day" basket of non-organic fruit and vegetables
from a supermarket have been measured and found to contain only a small fraction of the estimated daily dietary requirement.
So eating adequate amounts of commercially available fruit and vegetables will not provide the essential
nutrients the body needs. Even an organic diet may be inadequate since the varieties of fruit and vegetable
commercially available may be types that are low in Salvestrols.
Examining other likely sources of Salvestrols in the western diet, such as fruit juices, other beverages and processed foods,
Salvestrols were again found to be largely absent. In the case of some fruit juices where they should have been present,
for example in cranberry juice, it was discovered that the Salvestrols were removed during processing in order to make the
product taste sweeter, as most Salvestrols have a sharp or bitter taste. So, again, it is currently very difficult to get
an adequate intake of Salvestrols without taking a supplement.