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cutting gel????
- Thread starter diezel
- Start date
Cutting Gel's active ingredient is aminophylline:
Aminophylline is a xanthine derivative, similar to caffeine, which is not a particularly potent fat burner. In rat studies, it has shown good thermogenic properties due to blockade of adenosine receptors (which provide one of the negative feedback mechanisms for catecholamine induced thermogenesis) and inhibition of phosphodiesterase (which degrade cyclic AMP) -- but this is at extremely high doses, which would kill a human, so it is not applicable (1,2). At therapuetic doses, only adenosine blockade occurs, which will act to increase norepinephrine levels (3)-- but norepinephrine stimulates alpha 2 receptors (bad) in addition to beta 2 receptors (good) -- and in stubborn fat, alpha 2's outnumber beta 2's (4).
Like caffeine, it is a good diuretic (5), which would account for the girth loss in the study they reference, which did not measure actual fat loss (6,7). One study did look at fat depth after use of an aminophylline cream, and no difference was found vs. control (8).
As a local diuretic, it seems to be effective, but as a true fat loss agent, it quite likely is not.
There ARE several topicals that attempt to truly increase lipolysis -- this just is not one of them.
ParDeus
www.avantlabs.com
References
1. Arner P, Kriegholm E, et al. Adrenergic regulation of lipolysis in situ at rest and during exercise. J Clinical Invest 1990; 85:893-898.
2. Millet L, Barbe M, Lafontan M, Berlan M, Galitzky J. Catecholamine effects on lipolysis and blood flow in human abdominal and femoral adipose tissue. J Appl Physiol 1998; 85(1):181-188.
3. Goldberg MR Robertson D. Yohimbine: a pharmacological probe for study of the a 2-adrenoceptor. Pharmacol Rev 1983;35:143-180.
4. Berlan M, Galitzky J, Riviere D, et al. Plasma catecholamine levels and lipid mobilization induced by yohimbine in obese and non-obese women. Int J Obesity 1991; 15:305-315.
5. Galitzky J, Taouis M, Berlan M, Riviere D, et al. a 2-Antagonist compounds and lipid mobilization: evidence for a lipid mobilizing effect oral yohimbine in healthy male volunteers. Eur J Clin Invest 1988; 18:587-594.
6. Hodgetts V, Coppack S, Frayn KN, Hockaday TDR. Factors controlling fat mobilization from human subcutaneous adipose tissue during exercise. J Appl Phys 1991; 71:445-451.
7. Ruffolo RR, Bondinell W, Hieble JP. a - and b -Adrenoceptors: From the gene to the clinic. 2. Structure-activity relationships and therapeutic applications. J Med Chem 1995; 38(19):3415-3444.
8.. Ruffolo RR, Bondinell W, Hieble JP. a - and b -Adrenoceptors: From the gene to the clinic. 2. Structure-activity relationships and therapeutic applications. J Med Chem 1995; 38(19):3415-3444.
Aminophylline is a xanthine derivative, similar to caffeine, which is not a particularly potent fat burner. In rat studies, it has shown good thermogenic properties due to blockade of adenosine receptors (which provide one of the negative feedback mechanisms for catecholamine induced thermogenesis) and inhibition of phosphodiesterase (which degrade cyclic AMP) -- but this is at extremely high doses, which would kill a human, so it is not applicable (1,2). At therapuetic doses, only adenosine blockade occurs, which will act to increase norepinephrine levels (3)-- but norepinephrine stimulates alpha 2 receptors (bad) in addition to beta 2 receptors (good) -- and in stubborn fat, alpha 2's outnumber beta 2's (4).
Like caffeine, it is a good diuretic (5), which would account for the girth loss in the study they reference, which did not measure actual fat loss (6,7). One study did look at fat depth after use of an aminophylline cream, and no difference was found vs. control (8).
As a local diuretic, it seems to be effective, but as a true fat loss agent, it quite likely is not.
There ARE several topicals that attempt to truly increase lipolysis -- this just is not one of them.
ParDeus
www.avantlabs.com
References
1. Arner P, Kriegholm E, et al. Adrenergic regulation of lipolysis in situ at rest and during exercise. J Clinical Invest 1990; 85:893-898.
2. Millet L, Barbe M, Lafontan M, Berlan M, Galitzky J. Catecholamine effects on lipolysis and blood flow in human abdominal and femoral adipose tissue. J Appl Physiol 1998; 85(1):181-188.
3. Goldberg MR Robertson D. Yohimbine: a pharmacological probe for study of the a 2-adrenoceptor. Pharmacol Rev 1983;35:143-180.
4. Berlan M, Galitzky J, Riviere D, et al. Plasma catecholamine levels and lipid mobilization induced by yohimbine in obese and non-obese women. Int J Obesity 1991; 15:305-315.
5. Galitzky J, Taouis M, Berlan M, Riviere D, et al. a 2-Antagonist compounds and lipid mobilization: evidence for a lipid mobilizing effect oral yohimbine in healthy male volunteers. Eur J Clin Invest 1988; 18:587-594.
6. Hodgetts V, Coppack S, Frayn KN, Hockaday TDR. Factors controlling fat mobilization from human subcutaneous adipose tissue during exercise. J Appl Phys 1991; 71:445-451.
7. Ruffolo RR, Bondinell W, Hieble JP. a - and b -Adrenoceptors: From the gene to the clinic. 2. Structure-activity relationships and therapeutic applications. J Med Chem 1995; 38(19):3415-3444.
8.. Ruffolo RR, Bondinell W, Hieble JP. a - and b -Adrenoceptors: From the gene to the clinic. 2. Structure-activity relationships and therapeutic applications. J Med Chem 1995; 38(19):3415-3444.
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