"Are Onions Beneficial for Testosterone, Osteoporosis, Allergies, and Cancer?"
Onions are potentially a good source of antioxidants,
though interestingly, the antioxidants are concentrated
in the outer layers immediately under the papery peel.
Unfortunately, most consumers discard these most nutrient-rich
outermost layers, thus losing a valuable part.
Here are some numbers. Look at that!
More than 10 times more antioxidants in the
outer layer of white onions, compared to the core.
You’ll also note that yellow onions in general
have more antioxidants than white.
And red onions beat them both, based on three
different antioxidant testing methods.
That’s why I always try to buy red.
Though red onions are indeed slightly better, yellow
or white onions are no slouches, containing
considerable levels of antioxidant activity.
So, nutritious, sure, but are there any particular
clinical benefits to onion consumption?
There are grammatically challenged titles like this
in the medical literature purporting
all sorts of miraculous benefits.
But what do they base these claims on?
For example, here’s a review purporting to have evidence
that testosterone in males are enhanced by onion,
but the researchers were talking about studies like this on
the effects of onion juice on testicular torsion . . . in rats.
Who cares what happens after a rat testicle is rotated
720 degrees counterclockwise? (Except, of course, the rat.)
You don’t know what happens in people until you put
human testes to the test and . . .
onion extracts don’t appear to work.
Okay, what about bone health?
Evidently, older white women who consumed onions at least
once a day had an overall bone density that was 5% greater than
individuals who consumed onions no more than once a month (P < 0.03).
Now 5% might not sound like a lot, but that improvement in
bone density could potentially translate into decreasing
their risk of hip fracture by more than 20%
if indeed, it was cause and effect.
Daily administration of onion did cause a big bump in bone density.
This opens the possibility for a low-cost, safe, and effective
nutritional approach to osteoporosis and—
you guessed it...in the rat. Another rodent study.
Rats!
But finally, here we go.
Tremendous strides have been made
in treating osteoporosis with drugs, but they have the potential
for serious adverse side effects, so scientists have drawn
their attention to natural remedies.
So, let’s randomize people to drink... onion juice
or placebo onion juice.
I don’t know what sounds worse: sugary onion juice
or fake sugary onion juice.
And as if drinking onion juice wasn’t bad enough,
it was all for nothing. It didn’t even work.
What about the antiallergy activities of shallots
and any therapeutic effects on helping allergic runny noses?
Sixteen such patients were randomized equally into
an antihistamine group or a group that got antihistamines
plus some capsules containing dried shallot powder.
And it looked like the shallot group did better,
but there was actually no statistically significant difference
in total symptoms between the two groups;
so, another #OnionFail.
There has to be something onions can do.
What about testing the effects of fresh yellow onion consumption
on breast cancer patients to try to decrease the toxic effects
of a chemotherapy drug called doxorubicin?
Unfortunately, no significant benefit was found on decreasing
damage to the liver or heart.
But here we go . . . finally, a clinical benefit to onions.
The consumption of fresh yellow onion ameliorates
the high blood sugars and insulin resistance in breast cancer
patients during doxorubicin- based chemotherapy.
Doxorubicin isn’t just toxic to the liver and heart,
but it may also contribute to insulin resistance.
So, let’s do a randomized, triple-blind, controlled clinical trial
randomizing patients to like a whole onion a day
or a third of an onion a day. What happened?
The high onion group experienced a significant decrease
in blood sugars and insulin resistance
compared to the low onion group.
They went up in the low onion group but down in the high onion group.
So, make onions your friend.
What’s the worst that can happen— a little onion breath and BO?
Probably the least of your worries if you have cancer on chemotherapy.