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Rhodiola is one of the most effective in this family, due to containing active compounds like rosoavin that have the ability to help balance the stress hormone, cortisol.This unique herb that is a member of the Rhodiola genera in the Crassulaceae plant family grows at high altitudes in the arctic areas of Asia and Eastern Europe. Rhodiola rosea has been a part of traditional medicine systems practiced across the world, especially in parts of Europe, Asia and Russia, for many centuries.

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1. Can Decrease Stress

Rhodiola has long been known as an adaptogen, a natural substance that increases your body’s resistance to stress in non-specific ways.

Consuming adaptogens during stressful times is thought to help you handle stressful situations better.

One study investigated the effects of rhodiola extract in 101 people with life- and work-related stress. Participants were given 400 mg per day for four weeks.It found significant improvements in symptoms of stress, such as fatigue, exhaustion and anxiety, after just three days. These improvements continued throughout the study.

Rhodiola has also been shown to improve symptoms of burnout, which can occur with chronic stress.

What’s more, in a study in 118 people with stress-related burnout, it improved many associated measures, including stress and depression.

2. Can Fight Fatigue

Stress, anxiety and inadequate sleep are just a few factors that can contribute to fatigue, which can cause feelings of physical and mental tiredness.

Due to its adaptogenic properties, rhodiola is thought to help alleviate fatigue.

One four-week study in 60 people with stress-related fatigue looked at its effects on quality of life and symptoms of fatigue, depression and attention. Participants received either 576 mg of rhodiola or a placebo pill daily.

It found that rhodiola had a positive effect on fatigue levels and attention, compared to the placebo.

In a similar study, 100 people with chronic fatigue symptoms received 400 mg of rhodiola every day for eight weeks. They experienced significant improvements in stress symptoms, fatigue, quality of life, mood and concentration.

These improvements were observed after only one week of treatment and continued to improve through the final week of the study.

3. Could Help Reduce Symptoms of Depression Depression is a common but serious illness that negatively affects how you feel and act.

It’s thought to occur when chemicals in your brain called neurotransmitters become unbalanced. Health professionals commonly prescribe antidepressants to help correct these chemical imbalances.

Rhodiola rosea has also been suggested to have antidepressant properties by balancing the neurotransmitters in your brain.

In one six-week study on the effectiveness of rhodiola on symptoms of depression, 89 people with mild or moderate depression were randomly assigned to receive either 340 mg or 680 mg of rhodiola or a placebo pill daily .

Both rhodiola groups experienced significant improvements in overall depression, insomnia and emotional stability, whereas the placebo group showed no improvements.

Interestingly, only the group receiving the larger dose showed improvements in self-esteem.

Another study compared the effects of rhodiola to the commonly prescribed antidepressant sertraline, which is sold under the name Zoloft. It randomly assigned 57 people diagnosed with depression to receive rhodiola, sertraline or a placebo pill for 12 weeks.

While rhodiola and sertraline both reduced symptoms of depression, sertraline had a greater effect. However, rhodiola produced fewer side effects and was better tolerated.

4. Improves Brain Function

Exercise, proper nutrition and a good night’s sleep are sure ways to keep your brain running strong.

Some supplements may also help, including rhodiola. One study tested its effects on mental fatigue in 56 physicians working night duty. The physicians were randomly assigned to receive either 170 mg of rhodiola or a placebo pill per day for two weeks. Rhodiola reduced mental fatigue and improved performance on work-related tasks by 20%, compared to the placebo. Another study looked at the effects of rhodiola in military cadets performing night duties. The cadets consumed either 370 mg or 555 mg of rhodiola, or one of two placebos daily for five days. Both doses were found to improve the cadets’ capacity for mental work, compared to the placebos.

In another study, students experienced significantly reduced mental fatigue, improved sleep patterns and increased motivation to study after taking rhodiola supplements for 20 days. Their exam scores were also 8% higher than those in the placebo group.

Two review articles also found evidence that rhodiola can ease mental fatigue, but they cautioned that the limited quantity and quality of the research did not allow for solid conclusions to be made.

5. Can Improve Exercise Performance

Rhodiola also shows promise for improving exercise performance. In one study, participants were given 200 mg of rhodiola or a placebo two hours before performing a cycling test.

Those given rhodiola were able to exercise for an average of 24 seconds longer than those given a placebo. While 24 seconds may seem small, the difference between first and second place in a race can be milliseconds .

Another study looked at its effects on endurance exercise performance.

Participants cycled for a six-mile simulated time-trial race. One hour before the race, participants were given rhodiola at a dose of 1.4 mg per pound (3 mg per kg) of body weight or a placebo pill.

Those given rhodiola finished the race significantly faster than the placebo group.

In these studies and others, rhodiola has been shown to improve exercise performance by decreasing perceived exertion, or how hard participants felt their bodies were working.

However, it's unlikely to have any effect on muscle strength or power (23, 27).

6. May Help Control Diabetes Diabetes is a disease that occurs when your body develops a reduced ability to produce or respond to the hormone insulin, resulting in high blood sugar levels (28).

People with diabetes commonly use insulin injections or medications that increase insulin sensitivity to normalize their blood sugar levels.

Interestingly, animal research suggests rhodiola may help improve diabetes control (29).

In fact, it has been shown to lower blood sugar in diabetic rats by increasing the number of glucose transporters in the blood. These transporters lower blood sugar by transporting glucose into the cells (30, 31).

These studies were performed in mice, so their results can’t be generalized to humans. However, they’re a compelling reason to investigate the effects of rhodiola on blood sugar in people.

If you have diabetes and wish to take rhodiola supplements, make sure to speak with your dietitian or doctor first.

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