Benefits
Traditional bitter for digestion and appetite
The ESCOP monograph on angelica root lists it for indigestion with mild cramping, sluggish digestion and gas, and for poor appetite. The same monograph states that no clinical data exist for preparations of angelica root alone. The European Medicines Agency has not issued an EU herbal monograph for this root; its inventory lists only a European Pharmacopoeia quality standard.
One of nine herbs in the digestive blend STW 5
Angelica root is one of nine extracts in the liquid blend STW 5 (Iberogast), led by bitter candytuft. In placebo-controlled trials in adults with functional digestive complaints the whole blend improved symptom scores, by about 1 point more than placebo in the largest trial. A six-herb version without angelica, milk thistle or celandine also beat placebo, so no effect can be credited to angelica.
Leaf extract and daytime bathroom trips (leaf, not root)
In a 6-week placebo-controlled pilot trial in Spanish adults with bladder urgency (143 randomized, 110 analyzed), 200 mg a day of a garden angelica leaf extract improved self-rated daytime voiding and quality of life more than placebo. Voiding diaries showed no group difference in daytime or nighttime voids, and urgency did not differ. This tested the leaf, a different plant part from the root.
Leaf extract and nighttime bathroom trips in older men
In an 8-week placebo-controlled trial in 69 Icelandic men aged 45 or older who woke at least twice a night to urinate, nightly voids fell by about 30% with both a garden angelica leaf product and placebo, with no difference between groups. Gains appeared only in subgroups chosen after the fact, and three authors worked for the maker. This tested the leaf, not the root.
Root extract combined with ferulic acid in memory studies
A supplement pairing 40 mg of angelica root extract with 200 mg of ferulic acid was tested in older Japanese adults with mild memory decline. In a 48-week placebo-controlled trial the main memory score did not differ in the intention-to-treat analysis, though a secondary screening score favored the supplement; a smaller open-label study found no differences. Ferulic acid made up most of the dose.
Stomach lining and behavior effects in rodent studies
In rats, an angelica extract from the STW 5 formula reduced stomach damage caused by the painkiller indomethacin, with lower acid output and more protective mucus. In another rat study, a methanol extract of the root increased open-arm exploration in an anxiety maze test. These are animal results only and have not been tested in people.
Mechanism of action
Furanocoumarins that react with UV light
Angelica preparations contain linear furanocoumarins such as xanthotoxin (8-methoxypsoralen) and bergapten (5-methoxypsoralen) and the angular furanocoumarin angelicin. Activated by UVA light, these compounds bind DNA; linear forms cause skin reactions and are photogenotoxic, while angelicin appears weaker. This is the same chemistry used in PUVA skin therapy.
Acid, mucus and prostaglandin effects in the rat stomach
In rats given indomethacin, single plant extracts from the STW 5 formula, including angelica, lowered acid output, raised mucin secretion and prostaglandin E2 release and lowered leukotrienes, in a dose-dependent way. These are animal findings.
Bitter and aromatic fractions with uncertain absorption
Angelica root contains coumarins, an essential oil with more than 200 compounds, bitters and tannins, and the content varies with origin, age and extraction. The EMA notes that many of these glycosides are broken down before absorption and the aglycones are heavily metabolized, so how much reaches the bloodstream in people is not well known.
Clinical trials
Randomized, triple-blind, placebo-controlled pilot trial (1.75:1 allocation) of SagaPro, 200 mg/day of Angelica archangelica leaf extract, for 6 weeks in adults with overactive bladder symptoms (urgency, nocturia and frequent urination on the IPSS); registered as NCT04357223; funded through an EU grant with the maker, analysis reported as independent. (López-Seoane et al. 2025, Food Sci Nutr)
143 Spanish adults aged 18 to 75 randomized; 110 analyzed per protocol (65 extract, 45 placebo) after 33 were lost to follow-up.
Versus placebo, the leaf extract group improved more on IPSS daytime voids (p = 0.004), the IPSS storage subscore (p = 0.025) and quality of life (p < 0.001). Questionnaire nighttime voiding (p = 0.069) and urgency did not differ, and the 3-day voiding diaries showed no group difference in daytime voids (p = 0.745), nighttime voids (p = 0.363) or urgency (p = 0.122). Daytime void scores were higher in the extract group at baseline. Leaf, not root.
Parallel, randomized, double-blind, placebo-controlled trial of SagaPro, a product made from Angelica archangelica leaf, two tablets each evening for 8 weeks in men with nocturia; three authors were employees of the maker, SagaMedica. (Sigurdsson et al. 2013, Scand J Urol)
69 Icelandic men aged 45 or older with at least two nightly voids; 66 completed.
Actual nightly voids fell by 29.5% with SagaPro and 29.6% with placebo (p = 0.946), with no overall difference. Post hoc subgroup analyses in men with low nocturnal bladder capacity, some excluding men with sleep disorders, favored SagaPro. Adverse event reports were similar (21 SagaPro, 24 placebo). Leaf, not root.
Multicenter, randomized, double-blind, placebo-controlled trial of Feru-guard 100M (200 mg ferulic acid plus 40 mg Angelica archangelica root extract daily) in mild cognitive impairment; planned for 200 people over 2 years but stopped early; supplement and grants from the maker, Glovia. (Kudoh et al. 2020, J Alzheimers Dis Rep)
56 Japanese adults aged 65 to 85 enrolled; 47 in the intention-to-treat analysis (24 active, 23 placebo) and 40 per protocol.
The primary outcome, ADAS-Jcog, did not differ between groups in the intention-to-treat analysis; the secondary MMSE score was better with the supplement at 24 weeks (p = 0.041). Per protocol, ADAS-Jcog favored the supplement at 24 and 48 weeks. Angelica was a small share of a ferulic acid product, so no effect can be credited to it.
Open-label, interventional controlled study of Feru-guard 100M, a supplement of ferulic acid and Angelica archangelica extract, taken daily for 48 weeks versus no supplement, in mild cognitive impairment, with PiB PET amyloid imaging. (Matsuyama et al. 2020, Psychogeriatrics)
17 Japanese adults with mild cognitive impairment (10 supplement, 7 no-supplement controls).
There were no significant differences between groups in amyloid deposition in seven brain regions, in four measures of brain atrophy, or in five cognitive tests. The study was small, unblinded and had no placebo.
Animal study, not a human trial: nine plant extracts from STW 5, including Angelica archangelica, tested singly and as the STW 5 and STW 5-II blends against indomethacin-induced stomach ulcers in rats, with acid, mucin, prostaglandin and leukotriene measures. (Khayyal et al. 2001, Arzneimittelforschung)
Rats; no human participants.
All single extracts, angelica included, reduced ulcer formation in a dose-dependent way, with lower acid output and higher mucin and prostaglandin E2. The combined blends worked best. STW 5-II, which leaves out angelica, milk thistle and celandine, was among the most effective. Rodent data only.
Animal study, not a human trial: methanol extracts of Angelica archangelica root, stem, leaf, fruit and whole plant compared with diazepam in the elevated plus maze. (Kumar and Bhat 2012, J Tradit Complement Med)
Rats; no human participants.
All extracts increased entries into and time on the open arms of the maze, a sign of reduced anxiety-like behavior in rodents. The abstract ranks the root first in one passage and intermediate in another. Rodent behavior tests do not show a calming effect in people.