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Grüns
Grüns is a US gummy supplement brand founded in 2023 by Chad Janis, selling Superfoods Greens Gummies (8-gummy daily packs, 60+ ingredients, 6 g fiber); acquired by Unilever on 1 June 2026.
GS1191-0445 (haemophilia A AAV gene therapy)
GS1191-0445 (GS001) is Gritgen Therapeutics' AAV8 gene therapy delivering B-domain-deleted human factor VIII for hemophilia A; first-in-China HA gene therapy, now in phase 3 (NCT06833983) with CDE Breakthrough Therapy Designation.
GSI study
GSI study (NCT02735824), Genetic Study of Immunodeficiency, is a Swiss observational study led by University Children's Hospital Zurich, enrolling 500 suspected primary immunodeficiency patients plus relatives to find genetic causes, running 2016 to 2027.
GSK plc
GSK plc (GlaxoSmithKline) is a British biopharmaceutical company formed in December 2000 by merging Glaxo Wellcome and SmithKline Beecham. It sells specialty medicines, vaccines, and general medicines, with £32.7bn 2025 turnover, and spun off Haleon in 2022.
GSR-ET study
The GSR-ET study (German Stroke Registry–Endovascular Treatment) is an academic, industry-independent registry evaluating endovascular treatment of acute ischemic stroke in routine care at 25 German stroke centers since 2015.
GSS trial
The GSS trial, or Good Schools Study, was a cluster randomized trial in 42 Ugandan primary schools that found the Good School Toolkit cut staff violence by 42%.
Gua sha (刮痧)
Gua sha (刮痧), also called coining, cao gio, or kerokan, is a traditional East Asian therapy that press-strokes lubricated skin with a smooth-edged tool to raise petechiae lasting 2-5 days; trial evidence for pain relief remains low-certainty.
Guadecitabine
Guadecitabine (SGI-110, S110) is an investigational dinucleotide prodrug of decitabine, resistant to cytidine deaminase, that inhibits DNMT1; its phase 3 ASTRAL-1 AML trial missed its primary endpoint.
Guaiac-based fecal occult blood test
The guaiac-based fecal occult blood test (gFOBT) is a chemical stool test that detects heme from bleeding anywhere in the gastrointestinal tract, used for colorectal cancer screening.
Guaifenesin
Guaifenesin (glyceryl guaiacolate ether), an oral expectorant derived from guaiac resin, thins airway mucus; the only OTC expectorant marketed in the US, sold as Mucinex and Robitussin since the 1989 monograph.
Gualou Guizhi Tang
瓜蒌桂枝汤 (Gualou Guizhi Tang, 栝蒌桂枝汤), a Han-dynasty decoction from the Jingui Yaolüe: Guizhi Tang plus trichosanthes root (tianhuafen), the classic formula for taiyang soft tetany with body stiffness, sweating, and a deep slow pulse; listed in China's second batch of ancient classic famous formulas.
Guanabenz
Guanabenz (Wytensin) is a centrally acting alpha-2 adrenergic agonist antihypertensive, dosed 8–32 mg/day twice daily; discontinued in the US and investigated for ALS and vanishing white matter.
Guanadrel
Guanadrel (Hylorel) is a discontinued oral postganglionic sympathetic inhibitor, a guanidine analog of guanethidine, FDA-approved in 1982 for mild to moderate hypertension.
Guanfacine
Guanfacine (Tenex IR, Intuniv ER) is a selective alpha-2A-adrenergic receptor agonist; a nonstimulant second-line ADHD medication for children and adolescents, also used adjunctively with stimulants and for tics, with somnolence and hypotension as key effects.
Guanfu base A hydrochloride
Guanfu base A hydrochloride (盐酸关附甲素, acehytisine hydrochloride) is a diterpene alkaloid antiarrhythmic from Aconitum coreanum roots; a multi-ion channel blocker with atrial-selective sodium channel inhibition used for supraventricular tachycardia in China.
Guanidinoacetate methyltransferase deficiency
Guanidinoacetate methyltransferase (GAMT) deficiency is an inherited metabolic disorder in which the body cannot make creatine and guanidinoacetate accumulates, causing epilepsy, intellectual disability, and treatable neurological disease.
Gudapippali
Gudapippali (गुडपिप्पली), also written Guḍapippali, is a classical Ayurvedic multi-ingredient formulation (AFI000244, dose 6–12 g) built on jaggery and long pepper, indicated for splenic and liver diseases, cough, and chronic fever.
Gudicyadi Taila
Guduchyadi Taila (Gudicyadi Taila, Amritottara Taila) is a classical Ayurvedic medicated oil of Tinospora cordifolia, cow milk, and sesame oil, used for Vatarakta (gouty arthritis), scalp itching, and gynecological therapies.
Guduci Lauha
Guduci Lauha (Guduchyadi Lauha, Guducyadi Louha) is an Ayurvedic herbo-mineral iron formulation from Bhaishajya Ratnavali combining Lauha Bhasma with Tinospora cordifolia and digestive herbs, listed in AFI Part II 17:1 and used mainly for gout (Vatarakta).
Guduci Sattva
Guduci Sattva (गुडूची सत्त्व), also called Giloy Sattva, is an Ayurvedic powder extracted from the Tinospora cordifolia stem, prescribed mainly for fever and as a general tonic.
Guducyadi kvatha curna
Guducyadi kvatha curna (Guḍūcyādi gaṇa kvātha cūrṇa, AFI000560) is a classical Ayurvedic coarse-powder decoction of guduchi, coriander, neem, red sandalwood, and padmaka, used as an appetiser and febrifuge; AFI dose 48 g/day.
Guducyadi Modaka
Guḍūcyādi Modaka (गुडूच्यादि मोदक) is a classical Ayurvedic herbal-mineral confection in the Ayurvedic Formulary of India (AFI000047), built on guduchi, dosed 6-12 g, and indicated for urinary disorders, bleeding, and as a rasayana.
Gugulipid (guggulsterone-standardized guggul extract)
Gugulipid, a guggulsterone E/Z-standardized extract of Commiphora mukul oleoresin developed by CDRI Lucknow and approved in India as a lipid-lowering drug; FXR-antagonist mechanism, but a 2003 US trial found LDL-C rose.
GUIDE-IT trial
GUIDE-IT (NCT01685840) was a 2013–2016 randomized trial in 894 high-risk HFrEF patients at 45 US and Canadian sites testing NT-proBNP-guided therapy targeting <1,000 pg/mL versus usual care; it was stopped for futility with no outcome difference.
Guided antiplatelet therapy
Guided antiplatelet therapy is a cardiology treatment strategy that uses platelet function testing or CYP2C19 genotyping to select and dose P2Y12 inhibitors like clopidogrel for individual patients.
Guided implant surgery
Guided implant surgery is a dental technique that transfers a virtual implant plan, built from CBCT scans, to the surgical field using static templates or dynamic navigation.
Guided meditation
Guided meditation is meditation in which an instructor or recording verbally directs a participant's attention, breathing, and imagery, most often to produce relaxation and reduce stress, anxiety, depression, or pain.
Guided tissue regeneration
Guided tissue regeneration (GTR) is a periodontal surgical technique in which a barrier membrane excludes fast-growing tissue so bone, cementum, and periodontal ligament regrow on a cleaned tooth root.
Guideline Adherence
Guideline adherence: conformity of health organizations and professionals to clinical guidelines, protocols, and standards (MeSH D019983, 1998). Distinct from patient compliance; measured via surveys, chart review, and rule-based alignment; rates range 1–100% across studies.
Guillain–Barré syndrome
Guillain–Barré syndrome, or GBS, is a rare autoimmune disorder in which the immune system attacks the peripheral nerves, causing weakness that can progress to paralysis.