Rhodiola rosea extract is easy to handle and hard to buy well. Most formulation problems with it come from the specification, not the process. If the rosavins are missing, the material may not be Rhodiola rosea at all. Start there, then the format.
Specify Both Markers
Panossian, Wikman and Sarris (Phytomedicine, 2010) reviews the chemistry of rosenroot. Rosavins (rosavin, rosarin and rosin) are characteristic of Rhodiola rosea. Salidroside also occurs in other Rhodiola species.
An extract specified on salidroside alone can therefore come from a cheaper species. Specify rosavins and salidroside together, both by HPLC. The common clinical profile is 3% rosavins and 1% salidroside, roughly 3:1. See rosea vs crenulata.
Capsules and Tablets
The extract is a brown powder that encapsulates well. Doses in products are usually a few hundred milligrams of extract per serving, which fits a size 0 or 1 capsule on its own. Root extracts can pick up moisture, so keep drums sealed and check flow on humid days.
In tablets the extract compresses with standard excipients. A film coat improves appearance and protects against moisture.
Combination Products
Rhodiola often sits in blends with other botanicals, B vitamins or caffeine. Two points matter:
- Declare the rhodiola extract weight and its rosavin and salidroside content separately, so the profile survives dilution in the blend.
- Ask your laboratory whether it can quantify rosavins in the finished blend. Other ingredients can interfere with the HPLC peaks.
Drinks and Powders
Salidroside is water-soluble; rosavins are less so. A standard extract gives a brown, slightly bitter and astringent drink with some sediment. Test taste and clarity in the full recipe, and measure both markers after processing.
Choosing the Grade
| Grade | Typical use |
|---|---|
| 3% rosavins / 1% salidroside (HPLC) | Formulas matched to the common clinical profile |
| 5% rosavins / 1.8% salidroside (HPLC) | Higher-potency products |
| Salidroside 1% (rosavins on request) | Salidroside-led labels |
| Custom ratio or organic (on request) | Brand-specific profiles, organic lines |
Grades are on the Rhodiola rosea extract page. Check the status in your market first in the rhodiola regulatory guide.
Rhodiola rosea with both markers by HPLC
Tell us the profile, the format and the quantity. We send the specification and a reference certificate.