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Toxicité suppléments etrangers

Questions précises et discussions sur la diététique sportive

Toxicité suppléments etrangers

Messagepar audiomaniac le 31/08 19h58

Peux t'on encore acheter des suppléments en provenance de l'étranger ?


Les suppléments Coréens plein de cortisone

Monitoring of 35 illegally added steroid compounds in foods and dietary supplements
Food Additives & Contaminants: Part A Volume 31, Issue 9, 2014 pages 1470-1475 So-Hyun Choa

The adulteration of foods and dietary supplements with steroids has been well attested and has the potential to be dangerous owing to various possible side-effects. Therefore, detecting the presence of steroids in various health food products has become increasingly important. The purpose of this study was to monitor illegally adulterated health food products by applying multiple reaction monitoring techniques to tandem liquid chromatography-mass spectrometry (LC-MS/MS).

Various food and supplement samples advertised for the treatment of arthritis, bone ache and joint pain were collected over a 4-year period (2010–13) from local and online Korean sources. The method was validated based on limits of quantification of 0.5–15.0 ng g−1 and recoveries in spiked solid samples of 81–119%. Approximately 30% of the tested samples were identified as having been illicitly adulterated. Six compounds were observed overall, including dexamethasone (45.1%), cotrisone-21-aceteate and prednisone-21-acetate (16.2%), and betamethasone (14.4%), and found in some samples in high concentrations.

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Pleins d’estrogènes dans les suppléments?

Estrogenic endocrine disruptors present in sports supplements. A risk assessment for human health
Food Chemistry Volume 159, 15 September 2014, Pages 157–165 Monika Plotan

• Estrogenic activity is quantified in sports supplements and an exposure and risk assessment performed.
• 17β-Estradiol equivalent activity levels were higher than the ADI in 26% of exposure assessment samples.
• 17β-Estradiol equivalent activity levels were higher in 66% of exposure assessment samples than levels present in the typical diet.
• The predicted hormonal impact of greatest concern is for young boys and postmenopausal women.
• Consumers of sport supplements may be exposed to high levels of estrogenic endocrine disruptors.

Sports supplements are becoming a regular dietary addition for consumers who view such products as a means of improving their health and performance. Previously estrogenic endocrine disruptors (EDs) were detected in 80% of 116 sports supplements investigated by biological in vitro reporter gene assays (RGAs). The aim of this study was to quantify the hormonal activity in 50 of these sports supplement samples using a validated estrogen RGA and perform an exposure and risk assessment for human health.

Results showed that 17β-estradiol equivalent levels were higher than those reported as being present in the typical human omnivore diet in 33 of the sports supplements and higher than the acceptable daily intake (ADI) in 13 of these products. The highest activity samples presented a potential to influence the human daily exposure to 17β-estradiol like activity in various risk groups with a predicted hormonal impact of greatest concern in young boys and postmenopausal women.

In conclusion, consumers of sports supplements may be exposed to high levels of estrogenic EDs.

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audiomaniac
 
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Toxicité suppléments etrangers

Messagepar audiomaniac le 31/08 20h00

Tu conseilles des acides aminées Julien dans ton livre, mais pour certains ils sont uniquement disponible à l'étranger, quid de la sécurité ? Peut on faire confiance à des marques comme now foods par exemple ?
audiomaniac
 
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Toxicité suppléments etrangers

Messagepar audiomaniac le 03/09 19h05

Une réflexion Julien ?

Pour ma part j'ai du mal a faire confiance a MP, en effet tous les sacs ont la même apparence il y a donc un risque de recevoir un autre produit que celui commandé, non ?
audiomaniac
 
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Toxicité suppléments etrangers

Messagepar Julien V. le 03/09 20h13

audiomaniac a écrit:Une réflexion Julien ?

Pour ma part j'ai du mal a faire confiance a MP, en effet tous les sacs ont la même apparence il y a donc un risque de recevoir un autre produit que celui commandé, non ?


Si on en croit certains messages postés sur les forums, c'est déjà arrivé à certains.
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Julien V.
 
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Toxicité suppléments etrangers

Messagepar Marty McFlan le 04/09 15h18

Effectivement, un type avait posté un message sur le mur FB de MP pour se plaindre.

Il avait commandé de la Glutamine en poudre avec laquelle il s'etait preparé un shaker pré sommeil avec 5g de ce qu'il pensait etre de la Glutamine mais qui s'est avéré etre.... de la caféine.

Personnellement je commande chez MP uniquement les complements en capsules (o3, Thé Vert, Vits...), et plus recemment du Guarana en poudre. Sinon les proteines et autre c'est chez NM, une de mes grandes révélations de l'année 2014.
"If it does not challenge you, it will not change you"

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Full Clean: 3*3 @72,5 // PR @80
Front squat raw (below parralel): 3@100 // PR @120
Deadlift raw: 3*3 @150 // PR @160
Bench Press: 4*3 @120 // 2 @125
Rack pulls: 4*3 @210
Bent over rows: 8 @100
Presse inclinée: 1 @430 // 31 @200
Muscle ups: 3*5
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