L-Carnitine
Overview:
L-Carnitine is made in the body from the amino acids lysine and methionine.
It increases the use of fat as an energy source by transporting fatty
acids into the mitochondria, where they are 'burned' to release energy
for body functions. The L-carnitine form may cause adverse side effects
however. It is available in several different forms including propionyl-L-carnitine
and acetyl-L-carnitine. Propionyl-L-carnitine, through its enhancement
of metabolism has been proven to prevent ischemia-induced heart dysfunction,
and acetyl-L-carnitine has been suggested to delay the progression
of Alzheimer's disease. L-carnitine is found naturally in avocados,
breast milk, dairy products, red meats (namely lamb and beef), and
tempeh (fermented soybean product). A deficiency of L-Carnitine can
cause muscle fatigue, cramps, or low blood-sugar levels.
How This Supplement Works in Your Body:
Promotes normal growth and development
Possible treatment for (and maybe prevention of) some forms of cardiovascular
disease
May protect against muscle disease
May help build muscle
May protect against liver disease
May protect against diabetes
May protect against kidney disease
Potential diet aid
May make low-calorie diets easier to tolerate by reducing feelings
of hunger and weakness
May increase energy and activity in people with congestive heart
disease
Where This Supplement is Found:
Avocados
Breast milk
Dairy products
Red meats (namely lamb and beef)
Tempeh (fermented soybean product)
How to Use:
Take whole with a full glass of liquid. Do not chew or crush. Take
L-carnitine with meals or 1 to 1-1/2 hours after meals unless otherwise
advised by your physician.
Avoid L-carnitine tablets; they may be toxic.
Available as:
Tablets
Acetyl-L-carnitine.
Propionyl-L-carnitine
Cautions:
Don't take if you are:
Allergic to any food protein, like eggs, milk, and wheat
At risk of poor nutrition for any reason
Pregnant, there is a possibility you are pregnant or plan to become
pregnant in the future
Consult your doctor if you:
Experience any liver or kidney problems
Pregnancy:
Do no use unless advised by your doctor. There are no proven problems
in pregnant women taking small or usual amounts, however the chance
of problems do exist.
Breastfeeding:
Do no use unless advised by your doctor. There are no proven problems
in breast-fed infants of lactating mothers taking small or usual
amounts, however the chance of problems do exist.
Infants and Children:
It is hazardous to treat infants and children under 2 with any supplement.
Storage:
Keep in a cool and dry location, but do not freeze.
Keep safely away from children.
Do not keep in bathroom medicine cabinet. Heat and dampness may
alter the action of the supplement.
Safe dosage:
To date, there has been no "safe" dosage established.
Toxicity:
Information on the comparative-toxicity rating cannot be found in
standard references.
Side Effects:
Signs and symptoms : What to do
Muscle weakness : Discontinue use. Consult your doctor.
Symptoms of myasthenia (progressive weakness of certain muscle groups
without evidence of atrophy or wasting) have been reported in kidney
patients being maintained for prolonged periods on hemodialysis
and supplemental L-carnitine : Do not take supplements without doctor's
prescription and supervision.
