Average Reviews:
(More customer reviews)This product fits the Wikipedia description of increasing energy and mental performance although its composition is unexpected (more on that below). It provides me a boost of positive energy but only slightly and not long-lasting.
The studies don't show a notable nutritional benefit, but Wikipedia confirms that rhodiola rosea is also effective in treating clinical depression. A boost in energy and mental alertness would help battle depression but then I think much larger dosages would be needed.
Suggested use per container is 2 tablets twice daily between meals. For me, the effect of the 2 tablets is good but doesn't last until the next meal, and as yet I haven't tried taking more than 4 per day.
They claim this is a product to take in the morning and early afternoon since it might interfere with sleep (unless you work the third shift). I don't take this warning seriously because the effect has not been long-lasting. The strength of a particular brand particular Rhodiola Rosea is impossible to determine although the composition of ingredients is given.
The unexpected composition is worth noting. Per this product: "Combines an extract standardized to 0.8% salidrosides and 0.8% rosavin with a whole root extract, for a complete spectrum of rhodiola constituents"
This departs from the natural standardized amount of 3 percent rosavins and 0.8% to 1% salidroside, because the naturally occurring ratio of these compounds in Rhodiola rosea root is approximately 3:1.
In other words, all the studies that definitely show Rhodiola rosea root is effective use a 3:1 ratio and this product uses a .8:.8 or more precisely a 1:1 ratio. The studies used a 100 mg tablet. Planetary Formulas uses a 327 mg tablet.
With its 327 mg tablet, Planetary Formulas provides only 86.7% of of rosavin when compared to the standard 100 mg tablets of the studies. Planetary Formulas gives us a bigger pill but slighly less rosavin. Why?
Although we get 86.7% of the rosavin we expected, we get 262% of the salidrosides per dosage as we expected. (I did the math.) Again, why?
Their 327 mg tablets might seem like added value over the standard 100 mg tablet upon which all the studies are based. Also they state, "with a whole root extract," and the fact is that 28 compounds have been identified in Rhodiola rosea. Possibly their bigger tablet contains more of these 28 compounds, but I have no way to be certain about that.
I can't say what the motivation was for creating a product with this ratio. I am tempted to infer that the missing rosavin costs more than the added salidroside. After all this thinking about it, I recognize that the price is favorable per tablet anyway.
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