Men could be largely infertile by 2060, with exposure to toxic chemicals and unhealthy lifestyles thought to be the main causes. By...
Men could be largely infertile by 2060, with exposure to toxic chemicals and unhealthy lifestyles thought to be the main causes.
By Jules Siedenburg
A friend recently confided in me about his fertility problems. His
physician had told him his sperm were small and malformed, to the point
that he might struggle to get his wife pregnant. In an effort to make
him feel less bad, perhaps, she added that male fertility problems were
currently at “epidemic” levels in the UK.
Recent articles in several major news outlets told this same worrisome tale. For instance, one BBC headline screamed, “sperm count drop ‘could make humans extinct’”. These articles were based on authoritative new research that found a large and continuing fall in sperm count across numerous countries, as also reported in The Conversation.
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Under
current trends, this could lead to human males being largely infertile
by 2060, with exposure to toxic chemicals and unhealthy lifestyles
thought to be the main causes. As if there weren’t already enough
problems in the world, what with geopolitical tensions and issues such
as war, poverty and climate change …
So are we doomed? Well, there may be cause for optimism.
Various natural remedies are touted as ways to increase men’s sperm count by the popular press, fertility websites and blogs. Examples include eating healthy foods, exercising regularly, and limiting time spent at a computer.
I cannot comment on such claims. I can, however, share relevant insights from my own work,
which involves researching algae and its potential to help poor
communities in the global South meet their food needs. While I focus on
algae as a food, it also has various other uses, such as animal feed,
pharmaceutical applications, and energy production. Given the headlines
about infertility, I wanted to report what researchers have learned
about edible algae (notably spirulina) and its linkages to fertility.
What the science says
One
way to assess any new health treatment is human trials, another is to
test it with animals. To date, most research on the significance of
edible algae to fertility has involved animal studies. Firm conclusions
therefore cannot be drawn about the applicability of this work to
humans. These early studies nonetheless flag linkages that could equally
apply to humans.
[post_ads]The available science reveals substantive and
sometimes dramatic improvements in male reproductive function thanks to
spirulina. The following examples show this effect consistently in a
range of different contexts, as reported in peer-reviewed academic
papers by researchers from institutions such as the University of Cairo,
the University of Tasmania and Mexico’s National Polytechnic Institute.
One
group of studies involved different animals of importance to
agriculture. For instance, two studies found enhanced male reproductive
function for boar when spirulina was incorporated into their feed, while a third found this same effect for bulls.
Similarly, studies on fish found higher fertility and larger gonad size among farmed red swordtail, gourami and yellow-tailed cichlid when their diet included spirulina.
A
second set of studies involved laboratory rodents, and found that
spirulina protected their sperm and reproductive organs from various
pathogens. For instance, several studies showed this for key industrial
toxins, such as mercury, arsenic, and the carcinogen benzo-alpha pyrene.
Other studies showed spirulina minimising the adverse effects of chemotherapy on testicular function of both rats and mice, while yet another study showed spirulina protecting the reproductive function of male mice from gamma radiation.
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Several recent reviews of the early research on spirulina are also pertinent. One
covered studies on the potential of spirulina to enhance the health,
growth rates and quality characteristics of different agricultural
animals. Another
covered experiments on the capacity of spirulina to help laboratory
animals cope with diverse pollutants and industrial toxins. A third
covered research on the capacity of spirulina to help protect humans
from different types of pathogens, including microbes, heavy metals, and
cancer. All three review papers were highly positive regarding the
impacts of spirulina, while also noting that further research is needed.
Please
don’t misunderstand: I am not claiming that eating algae can address
humanity’s fertility concerns. The available scientific evidence is
limited, and more research is needed to clarify these linkages.
The
provisional take home message from the early research is nonetheless
clear: various studies give cause for hope that edible algae could
significantly boost reproductive function in men, notably where it is
threatened by industrial toxins. For me at least, such findings offer
one good reason for optimism that a human fertility crisis might be
averted.
Jules Siedenburg, Research fellow in international development, University of East Anglia
This article was originally published on The Conversation. Read the original article.
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