Here is the design of a clinical trial:

Official Title: Actions of Dietary Tocotrienols on Obesity

Included conditions:
- Obesity
- Postmenopausal Women

Study Armgroups:
- {'label': 'Control', 'type': 'PLACEBO_COMPARATOR', 'description': 'One 430 mg olive oil softgel daily for 24 weeks. Each placebo softgel of 430 mg olive oil will contain no tocotrienol or tocopherols at detectable levels.', 'interventionNames': ['Drug: placebo softgel']}
- {'label': 'Intervention', 'type': 'ACTIVE_COMPARATOR', 'description': 'One 430 mg tocotrienol softgel daily for 24 weeks. Each tocotrienol softgel (DeltaGold® Tocotrienol 70%) contains 430 mg tocotrienol (90% δ-tocotrienol+10% γ-tocotrienol) with a 70% purity, representing 300 mg tocotrienol.', 'interventionNames': ['Drug: DeltaGold® Tocotrienol 70%']}

Interventions:
- {'type': 'DRUG', 'name': 'placebo softgel', 'description': 'Each placebo softgel of 430 mg olive oil will contain no TT or tocopherols at detectable levels.', 'armGroupLabels': ['Control'], 'otherNames': ['olive oil']}
- {'type': 'DRUG', 'name': 'DeltaGold® Tocotrienol 70%', 'description': 'DeltaGold® Tocotrienol 70% contains 430 mg tocotrienol (90% δ-tocotrienol + 10% γ-tocotrienol) with a 70% purity, representing 300 mg tocotrienol.', 'armGroupLabels': ['Intervention'], 'otherNames': ['tocotrienols']}

Primary Outcomes:
- {'measure': 'Fat mass', 'description': 'total and regional fat mass by DXA', 'timeFrame': '24 weeks'}
- {'measure': 'visceral adipose tissue', 'description': 'VAT by BIA', 'timeFrame': '24 weeks'}

Please estimate the sample size based on the assumption: 
The study assumes 0.20 correlations among repeated measures, 80% power, a significance level of 5%, and a high attrition rate of 20%. Missing data will be addressed via multiple imputation.
Sample size
        Sample size is determined to provide adequate power for the study. Data from previous studies suggest that the TT intervention would yield moderate to large changes (median f=0.31) in total fat mass and body weight. The power analysis for the present study is considered to observe similar changes in other previous studies20 37â39 and assumed 0.20 correlations among repeated measures. The analysis results revealed that the sample size of n=46âwill produce 80% power while controlling type I error under 5%. Conservatively assuming a high attrition rate of 20%, therefore, we plan to recruit 60 participants (30 in each group) at baselineâthat is, anticipated final nâ¥46 (power â¥80%) at the end of the study with up to 20% attrition. Missing data, either attrition or non-response, will be fully recovered via multiple imputation as described later, which will remove or minimise (if present) confounding effects of missingness on our statistical power.