Eesti turba balneoloogiliste kasutamisvõimaluste uuring (III etapp) — Study of Balneological Uses of Estonian Peat (Stage III)
Key Findings
- First clinical trial of Estonian balneological peat for hand osteoarthritis
- 23 patients started, 19 completed (4 dropouts: 1 skin sensitivity/vitiligo, 1 BP reaction, 1 malaise/suspected allergy, 1 subacute synovitis worsening)
- Treatment: finely ground peat in sealed bags heated to 42°C, hands immersed 30 min, 10 sessions over 2 consecutive weeks
- Pain (ICF scale): 53% positive — 4 pain-free, 6 reduced, 8 unchanged, 1 no prior pain
- Joint mobility (finger III-palm distance): 33% improvement, average reduction 1.4 cm in 7 patients
- Grip function improved in multiple patients
- Joint stiffness: 7 resolved, 1 reduced, 6 unchanged, 5 no prior issue
- All studied peat layers contain bioactive humic substances up to 60% of organic matter
- Estonian therapeutic peat reserves estimated at 920,000 tonnes across 7 deposits
- Contains comprehensive literature review by Übner on humic substance biological effects: TPP immunomodulation, antiviral activity, anticoagulant effects, collagen stabilization, desmutageenic activity
- Sodium humate has analgesic and anti-inflammatory effects; ammonium humate 2× more effective anti-inflammatory than acetylsalicylic acid
- Estrogenic activity of peat humic substances 5,000× greater than estradiol standard
- Ethics approval: Tallinn Medical Research Ethics Committee decision #1027
First-ever clinical trial of Estonian balneological peat, conducted at East Tallinn Central Hospital Rehabilitation Center (July-November 2007). Patients with bilateral hand osteoarthritis (Heberden’s nodes, Bouchard’s nodes, erosive interphalangeal arthritis, first carpometacarpal joint arthritis) received 10 sessions of peat thermotherapy over 2 weeks. Despite modest sample size and lack of control group, results showed clinically meaningful improvements in pain (53%), joint mobility (33%), and grip function. Four dropouts suggest safety monitoring is needed (1 skin sensitivity, 1 BP reaction, 1 malaise, 1 synovitis worsening).
The report also contains an extensive literature review by Monika Übner (Chapter 4) summarizing the state of knowledge on peat biological effects, including TPP (Tolpa Peat Preparation) immunomodulatory research, antiviral mechanisms, anticoagulant properties, and the remarkable finding that peat humic substance estrogenic activity is 5,000× that of estradiol.
This Stage III report followed geological surveys (Stages I-II) that identified 7 Estonian peat deposits suitable for balneological use, with total reserves of 920,000 tonnes.