Rhodiola rosea est une plante ayant une longue histoire d’utilisation pour aider le corps à s’adapter aux facteurs de stress de la vie. La rhodiola est inscrite dans les pharmacopées nationales de France, de Suède, du Danemark et de Russie en tant qu’adaptogène et « tonique cérébral » global. Les adaptogènes soutiennent la capacité de l’organisme à gérer le stress en équilibrant les niveaux d’hormones et de neurotransmetteurs normalement associés à la réaction au stress. Rhodiola est unique parmi les adaptogènes en ce qu’il a été cliniquement démontré qu’il augmente les réserves énergétiques et réduit les niveaux de l’hormone du stress, le cortisol. Il a été démontré que la rhodiola améliore la performance mentale pendant le travail de nuit, ce qui aide à la réduction de la fatigue chez les travailleurs de nuit ainsi que chez la personne moyenne souffrant de fatigue générale.

Rhodiola est le produit à base de plantes idéal pour les personnes qui subissent fréquemment le stress, et est particulièrement utile pour les travailleurs de nuit ou personnes ayant un style de vie très stressant.

Avantage AOR

Rhodiola d’AOR est standardisée en rosavine et en salidroside pour la conformité aux extraits utilisés dans les meilleures études cliniques, offrant une efficacité supérieure à celle des produits uniquement standardisés pour l’un ou l’autre de ces composés.

Anti-Fatigue EffectsOnce clinical trial found that in burn-out patients suffering from fatigue, Rhodiola reduced their cortisol (the stress hormone) levels upon awakening and improved their mental concentration, a capacity that is affected during burn-out.Anti-tumourRat studies have also found that Rhodiola rosea could block the growth of tumors, decrease metastasis, and extend survival times. It also enhanced the effects of the antitumor drug cyclophosphamide.Physical EnduranceSoviet scientists discovered a generation ago that Rhodiola allows experimental animals to use their body’s glycogen energy reserves more sparingly under forced exercise, and to replenish those reserves (and reserves of the crucial high-energy compound creatine phosphate) more quickly afterwards. These properties doubtless contribute to Rhodiola’s ability to extend animals’ endurance during forced swimming or clinging to a rod to avoid falling. To make sure that Rhodiola’s effects on physical performance was an adaptogenic effect, and not caused by flooding the body with steroids, scientists looked for the kind of hyper-masculinization you see in steroid freaks at the gym: no such signs were found.ResilienceAccordingly, Rhodiola extracts improve the organism’s capacity to stand up against a wide variety of stressors, including heat shock, heavy metal exposure, free radical assault, high altitude, liver-damaging chemicals, and exhaustive exercise. When eggs from freshwater snails were incubated with Rhodiola rosea, they had a survival rate of 90% when exposed to heat shock, compared to only 9% for eggs that were not exposed to Rhodiola.Heart StressAnother example is Rhodiola’s ability to protect the heart from stress. When lab animals are subjected to extreme cold or to massive doses of the stress hormone adrenaline, the regular, controlled beating of their hearts is disrupted and the oxygen supply is temporarily cut off. But Rhodiola supplements prevent arrhythmia, reduce the damage to the muscle cells of the heart, and balance the overflow of stress neurotransmitters normally associated with these stressors.Cognitive StressStudies suggest that Rhodiola can help prevent symptoms associated with intense physical or mental strain such as a decline in work performance, sleep difficulties, poor appetite, irritability, hypertension, headaches and fatigue. In rats, Rhodiola rosea was found to benefit learning and memory. In a human clinical trial, a Rhodiola rosea extract along with a combination of vitamins and minerals was given to 120 adults with physical and cognitive deficiencies in a 12 week drug monitoring study. There was a significant improvement in these deficiencies, with observed improvements in symptoms such as exhaustion, decreased motivation, daytime sleepiness, sleep disturbances, concentration deficiencies, forgetfulness, susceptibility to stress and irritability. This is likely due to Rhodiola’s ability to influence the levels of several neurotransmitters in the brain.Neurotransmitter ModulationAnimal studies have given us some clues to the neurochemical basis of these effects: Rhodiola has well-documented effects on the metabolism of a variety of neurotransmitters. For instance, Rhodiola enhances the transport of the serotonin precursors tryptophan and 5-hydroxytryptophan (5-HTP) across the blood-brain barrier, and decreases the action of the serotonin-degrading catechol-O-methyltransferase (COMT) enzyme. It also boosts brain levels of dopamine, acetylcholine, and norepinephrine, all of which are key neurotransmitters targeted by major classes of antidepressant drugs. Rhodiola also appears to influence the synthesis, levels, and/or activity of endorphins and enkephalins, since blocking the receptors for some of these “feel-good” peptides negates some of Rhodiola’s effects.The Importance of Full StandardizationEarlier research identified salidroside (and its free form, p-tyrosol) as a key active ingredient in Rhodiola, and many clinical trials still use salidroside as the sole active for standardization of their Rhodiola botanicals. More recently, studies have focused on the effects of rosavin. Some Rhodiola species found in China and elsewhere contain salidroside but not rosavin, the most characteristic active ingredient of true Rhodiola rosea. On the other hand, many products fail to standardize for the salidroside content, despite the extensive documentation of its adaptogenic effects. A properly-standardized Rhodiola extract will contain at least 3% rosavins and 1% salidroside; p-tyrosol will also be present in small amounts.