Tonic
herbs have been used for centuries to help people cope with the stress and
strain of living. This stress, both physical and mental, can weaken our immune
system response. To determine your immune function, ask yourself the following
questions; if you answer “yes” to any of them, your immune system would
probably benefit from the support of a tonic herb:
·
Do you catch cold
easily?
·
Do you get more
than two colds a year?
·
Are you suffering
chronic infection?
·
Do you get frequent
cold sores or have genital herpes?
·
Are your lymph
glands sore and swollen at times?
·
Do you have now or
have you ever had cancer?
·
Are you tired most
of the time?
Recurrent or chronic infections -
even very mild colds - occur only when the immune system is weakened. Under
such circumstances, there is a repetitive cycle that makes it difficult to
overcome the tendency towards infection; a weakened immune system leads to
infection, infection causes damage to the immune system, which further weakens
resistance. Enhancing the immune system by taking tonic herbs like Astragalus
and/or Ginseng will often provide the answer to breaking the cycle.
Previously we’ve looked at Ginseng;
this week we’ll look at Astragalus, a herb which is rapidly gaining fame in the
West as an immune stimulant. To classify it as an immune herb, however, is to
overlook its broader use as a tonic. It strengthens the body systems
(especially the lungs), improves the digestion and builds up the blood. Also,
it increases endurance and body weight in animals.
In the Chinese world-view,
Astragalus acts like the protective shield around the body, not unlike the
shield around the starship Enterprise on the popular TV series, Star Trek. When overall Qi is weakened,
or energy becomes depleted, this protective Qi is weakened, and we become more
susceptible to colds and sweat more easily. A deficiency of protective Qi (or
immune system weakness) is what makes AIDS patients so susceptible to
opportunistic infections; Astragalus has a demonstrated effect in strengthening
AIDS patients. Returning to my Star Trek
analogy, you can think of Astragalus as a bit like Scotty in the Enterprise
engine room, working feverishly to restore power to the shield before the
Klingons can destroy the ship.
Astragalus gained fame in scientific
circles in the 1980s as a possible immune-stimulating and anti-cancer herb. In
one trial with 19 cancer patients, it restored the function of the T-cells in
90% of the patients (T-cells are the main immune cells that attack tumours). In
another trial, Astragalus, along with other tonic herbs, increased the survival
time of cancer patients receiving chemotherapy. Unfortunately, funding for this
promising research in the US was closed because any eventual product could not
be patented, and a drugs company would not be able to recoup its investment.
Astragalus can be combined with
Ginseng if there is a lot of fatigue along with poor immune system functioning.
Astragalus is not used if you have a strong infection; otherwise it has no known toxicity. The Chinese also use this herb along with others to combat allergies like rhinitis and asthma.
Astragalus is not used if you have a strong infection; otherwise it has no known toxicity. The Chinese also use this herb along with others to combat allergies like rhinitis and asthma.
Many people use Echinacea to
strengthen their immune response, whereas Astragalus would be a much better
choice. Echinacea should be left for the inset of a cold, where it is very effective
and able to stop a cold in its tracks.
David
Foley
MRCHM,
MNIMH
Medical
Herbalist