Double Wood offers 120 vegan caps of 500 mg extract at a strong price, third-party tested and made in the USA. The catch is on the label: it's standardized to 3% salidrosides / 1% rosavins — the inverse of the 3% rosavins / 1% salidroside SHR-5 extract most human fatigue trials used. If you want the studied profile, this isn't it, and the label is easy to misread.
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Read the complete Rhodiola Rosea guide →Standardized to 3% salidrosides / 1% rosavins — the inverse of the SHR-5 profile the fatigue trials used. It carries both compounds, but in the wrong proportion for the studied effect, which is the central problem.
Third-party tested, gluten-free, made in the USA. Reasonable transparency for a value brand, though not at the practitioner-brand level.
500 mg total extract overshoots the 200-400 mg window, and the inverted ratio makes the effective rosavin dose lower than the milligram count suggests.
Generally well tolerated; the higher relative salidroside may feel more stimulating for some. Start low and take early in the day.
120 vegan caps at ~$18 is a genuinely good per-cap price and a long supply — value is the main thing going for it.
“Double Wood delivers the studied rhodiola profile”
Its 3% salidroside / 1% rosavin standardization is the inverse of the SHR-5 extract (3% rosavins / 1% salidroside) used in the classic fatigue trials (Darbinyan 2000, PMID 11081987; Spasov 2000, PMID 10839209).
“It's third-party tested and made in the USA”
Double Wood states third-party testing, gluten-free formulation and US manufacturing — reasonable QC basics for a value brand.
'3% salidrosides / 1% rosavins' reads almost identically to the studied '3% rosavins / 1% salidroside' at a glance — but the compounds are swapped. Buyers who don't parse it carefully will think they're getting the trial extract when they aren't.
At ~$0.15/cap this is cheap, and the testing is fine. But on a list where standardization to the studied profile is the axis, an inverted ratio caps how high it can rank regardless of price.
Double Wood is a fine value product with real testing, but the inverted 3% salidroside / 1% rosavin standardization is the wrong chemistry for the stress-fatigue evidence. Choose a rosavins-forward 3%/1% cap like Life Extension or NOW if you want what the trials actually used.
Check Double Wood on AmazonCorrect min 3% rosavins / 1% salidroside at similar value from a more auditable brand — the same price tier done right.
See it on the list →The rosavins-forward profile at the trial dose, cheaply — the studied-effect pick over an inverted ratio.
See it on the list →Benefit was tied to the rosavins-forward SHR-5 extract, not an inverted salidroside-dominant ratio.
The fatigue benefit came from a 3% rosavins / 1% salidroside extract — the opposite of Double Wood's ratio.
