OVERVIEW OF CHROMIUM IN RELATION
TO ATHLETICS
KRUPALI SHAH
SPORTS NUTRITIONIST, WEIGHT MANAGEMENT
COUNSELOR AND HEALTH BLO...
INTRODUCTION
Chromium is a metal. It is called
an “essential trace element”
because very small amounts of
chromium are ne...
Naturally
Occurring
Sources

http://www.sportsnutritionist.seotogrow.in
Supplemental
Sources

http://www.sportsnutritionist.seotogrow.in
FUNCTIONS OF CHROMIUM
 The biological function of chromium is not fully known yet. It is postulated that
chromium interac...
METABOLISM OF CHROMIUM
Food rich in
chromium

Blood

Cr6+ is rapidly taken up
by erythrocytes and
reduced to Cr3+ by
gluta...
Metabolism of Chromium in the Body.
 The principal route by which trivalent chromium enters the body is the
digestive sys...
RESEARCH STUDIES ON
CHROMIUM IN SPORTS

http://www.sportsnutritionist.seotogrow.in
Chromium supplementation and resistance training: effects on body composition,
strength, and trace element status of men.
...
Effect of Chromium Supplementation and Exercise on Body
Composition, Resting Metabolic Rate and selected
biochemical param...
CHROMIUM DEFICIENCY
Some evidence suggests that chromium deficiency may
be relatively common. However, this has not been
p...
What affects chromium levels in the body?
Absorption of chromium from the intestinal tract is low, ranging from less than
...
Interactions between chromium and medications
Medications

Nature of interaction

•Antacids
•Corticosteroids
•H2 blockers ...
THANK YOU !!

http://www.sportsnutritionist.seotogrow.in
Overview of Chromium in relation to Athletics
Prochain SlideShare
Chargement dans…5
×

Overview of Chromium in relation to Athletics

5 869 vues

Publié le

Chromium was discovered by Louis-Nicholas Vauquelin at 1797 in France. Origin of name: from the Greek word "chroma" meaning "colour", named for the many coloured compounds known for chromium.Chromium is an essential trace element for humans because it helps us to use glucose. We take in about 1 milligram a day; foods such as brewer’s yeast, wheat germ and kidney are rich in chromium. However it is poisonous in excess.

The biological function of chromium is not fully known yet. It is postulated that chromium interacts with the thyroid metabolism in humans.
Binding of Cr (III) with nucleic acids has been found to stimulate the DNA-dependant RNA synthesis .
The third inter-action of Cr (III) is with the hormone insulin and its receptors. This suggests that Cr (III) acts with insulin on the first step in the metabolism of sugar entry into the cell, and facilitates the interaction of insulin with its receptor on the cell surface.

Metabolism
The principal route by which trivalent chromium enters the body is the digestive system. Chromium in foods is present both in the inorganic form and as organic complexes. Intestinal absorption of chromium is low (0.5-2%), and the mechanism has not yet been fully elucidated.
Absorbed chromium circulates as free Cr3+, as Cr3+ bound to transferrin or other plasma proteins, or as complexes, such as glucose tolerance factor (GTF)-Cr.
Circulating trivalent chromium can be taken up by tissues, and its distribution in the body depends on the species, age, and chemical form. It is excreted primarily in the urine by glomerular filtration or bound to a low-mol-wt organic transporter. Chromium metabolism is still imperfectly understood.

0 commentaire
2 j’aime
Statistiques
Remarques
  • Soyez le premier à commenter

Aucun téléchargement
Vues
Nombre de vues
5 869
Sur SlideShare
0
Issues des intégrations
0
Intégrations
4
Actions
Partages
0
Téléchargements
34
Commentaires
0
J’aime
2
Intégrations 0
Aucune incorporation

Aucune remarque pour cette diapositive

Overview of Chromium in relation to Athletics

  1. 1. OVERVIEW OF CHROMIUM IN RELATION TO ATHLETICS KRUPALI SHAH SPORTS NUTRITIONIST, WEIGHT MANAGEMENT COUNSELOR AND HEALTH BLOGGER http://www.sportsnutritionist.seotogrow.in
  2. 2. INTRODUCTION Chromium is a metal. It is called an “essential trace element” because very small amounts of chromium are necessary for human health. Found in two forms i) Cr3+ and ii) Cr6+ Mechanism of action in body not well defined but known to enhance action of insulin. http://www.sportsnutritionist.seotogrow.in
  3. 3. Naturally Occurring Sources http://www.sportsnutritionist.seotogrow.in
  4. 4. Supplemental Sources http://www.sportsnutritionist.seotogrow.in
  5. 5. FUNCTIONS OF CHROMIUM  The biological function of chromium is not fully known yet. It is postulated that chromium interacts with the thyroid metabolism in humans.  Binding of Cr (III) with nucleic acids has been found to stimulate the DNAdependant RNA synthesis .  The third inter-action of Cr (III) is with the hormone insulin and its receptors. This suggests that Cr (III) acts with insulin on the first step in the metabolism of sugar entry into the cell, and facilitates the interaction of insulin with its receptor on the cell surface. http://www.sportsnutritionist.seotogrow.in
  6. 6. METABOLISM OF CHROMIUM Food rich in chromium Blood Cr6+ is rapidly taken up by erythrocytes and reduced to Cr3+ by glutathione in blood. Cr3+ bound to transferrin/ GTF-Cr Circulating Cr3+ taken up by tissues. http://www.sportsnutritionist.seotogrow.in
  7. 7. Metabolism of Chromium in the Body.  The principal route by which trivalent chromium enters the body is the digestive system. Chromium in foods is present both in the inorganic form and as organic complexes. Intestinal absorption of chromium is low (0.5-2%), and the mechanism has not yet been fully elucidated.  Absorbed chromium circulates as free Cr3+, as Cr3+ bound to transferrin or other plasma proteins, or as complexes, such as glucose tolerance factor (GTF)Cr.  Circulating trivalent chromium can be taken up by tissues, and its distribution in the body depends on the species, age, and chemical form. It is excreted primarily in the urine by glomerular filtration or bound to a low-mol-wt organic transporter. Chromium metabolism is still imperfectly understood. http://www.sportsnutritionist.seotogrow.in
  8. 8. RESEARCH STUDIES ON CHROMIUM IN SPORTS http://www.sportsnutritionist.seotogrow.in
  9. 9. Chromium supplementation and resistance training: effects on body composition, strength, and trace element status of men. (Lukaski HC et al,1996) Study: 36 men were supplemented with either 3.3-3.5 mumol Cr picolinate/ Cr chloride or 0.1 mumol placebo daily for 8 weeks. Double blind study. RESULT Chromium Supplementation 1) serum chromium concentration and urinary chromium excretion. 2) transferrin saturation was more with chromium picolinate supplementation Resistance Training 1) Strength, mesomorphy, fat-free mass, and muscle mass 2) in serum ferritin, total-iron-binding capacity, transferrin saturation, the ratio of enzymatic to immunoreactive ceruloplasmin, and plasma copper. http://www.sportsnutritionist.seotogrow.in
  10. 10. Effect of Chromium Supplementation and Exercise on Body Composition, Resting Metabolic Rate and selected biochemical parameters in moderately obese women following an Exercise Program (Volpe SL et al, 2001) 44 moderately obese women were given either placebo or 400 mcg of chromium per day. All participants were placed on an exercise program. Over a period of 12 weeks, no differences were seen between the two groups in terms of body weight, waist circumference, or percentage body fat. A small double-blind trial of older women undergoing resistance training also failed to find evidence of benefit. Generally negative results have been seen in other small double-blind trials as well. http://www.sportsnutritionist.seotogrow.in
  11. 11. CHROMIUM DEFICIENCY Some evidence suggests that chromium deficiency may be relatively common. However, this has not been proven, and the matter is greatly complicated by the fact that we lack a good test to identify chromium deficiency. http://www.sportsnutritionist.seotogrow.in
  12. 12. What affects chromium levels in the body? Absorption of chromium from the intestinal tract is low, ranging from less than 0.4% to 2.5% of the amount consumed and the remainder is excreted in the faeces Enhancing the mineral's absorption are vitamin C (found in fruits and vegetables and their juices) and the B vitamin niacin (found in meats, poultry, fish, and grain products) Absorbed chromium is stored in the liver, spleen, soft tissue, and bone. The body's chromium content may be reduced under several conditions. Diets high in simple sugars (comprising more than 35% of calories) can increase chromium excretion in the urine. Infection, acute exercise, pregnancy and lactation, and stressful states (such as physical trauma) increase chromium losses and can lead to deficiency, especially if chromium intakes are already low. Thus as a SPORTS NUTRITIONIST, for better absorption of Chromium, athlete meals should be planned in a way which will include foods that are good sources of B Vitamins and Vitamin C. http://www.sportsnutritionist.seotogrow.in
  13. 13. Interactions between chromium and medications Medications Nature of interaction •Antacids •Corticosteroids •H2 blockers (such as cimetidine, famotidine, nizatidine, and rantidine) •Proton-pump inhibitors (such as omeprazole, lansoprazole, rabeprazole, pantoprazole, and esomeprazole) These medications alter stomach acidity and may impair chromium absorption or enhance excretion •Beta-blockers (such as atenolol or propanolol) These medications may have their effects •Corticosteroids enhanced if taken together with chromium or •Insulin they may increase chromium absorption •Nicotinic acid •Non steroidal anti-inflammatory drugs (NSAIDS) •Prostaglandin inhibitors (such as ibuprofen, indomethacin, naproxen, piroxicam, and aspirin) http://www.sportsnutritionist.seotogrow.in
  14. 14. THANK YOU !! http://www.sportsnutritionist.seotogrow.in

×