Health Effect of Canola Oil Consumption in Shift Workers

Poznan University of Life Sciences

Status: Unknown

Conditions: Shift-Work Related Sleep Disturbance; Work-Related Condition; Diet Modification; Metabolic Syndrome

Treatments: Behavioral: Control group; Behavioral: Intervention group

Study type: Interventional

Funder types: Other

Identifiers

NCT03977558

IoHNaD

Details and patient eligibility

About

Shift work is associated with a higher risk of the development of cardiometabolic syndrome (CMtS) than in people working only during the day. One of the factors predisposing to the development of the CMtS in shift workers is an inappropriate composition of their diet. It was observed that the shift workers diet is characterized by a higher intake of saturated fatty acids (SFA) and a lower consumption of unsaturated fatty acids. One potential way to reduce the risk of CMtS in this study group seems to be a modification of their everyday diet by excluding the products of animal origin (e.g. butter) with simultaneously including vegetable oils (i.e. canola oil). The aim of the study is to evaluate the effect of replacement in the everyday diet of saturated fats (butter) with unsaturated fats (canola oil-based spread and canola oil added to main meals) in centrally obese shift workers on changes in body weight and body composition parameters as well as on changes in CMtS markers.

Full description

The study was designed as a randomized clinical trial to investigate the effects of the dietary intervention with moderate in fat content (~35% energy as fat) for 12 weeks on the improvement of cardiometabolic risk factors in centrally obese shift workers. Forty centrally obese shift workers (waist circumference ≥94 cm) were randomized (1:1) to the experimental group (n = 20) or the control group (n = 20). Eligibility criteria included: aged between 30-60 years, working rotating shifts for at least 5 years and working night shifts minimum five times a month. Excluded criteria was described in the point "Eligibility". Written informed consent was obtained from all of the participants, and the local ethic committee approved the study. The dietary intervention was mainly based on the simple rearrangement of shift workers' diets by replacing food items including SFA (e.g. butter) with those being sources of unsaturated fatty acids (UFA), mainly canola oil (given to the diet as spread or this oil was added separately to main meals)

Enrollment: 40 estimated patients

Sex: Male

Ages: 30 to 60 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• centrally obese (≥ 94cm) male
• aged between 30-60 years,
• working rotating shifts for at least 5 years and working night shifts minimum five times a month,

Exclusion criteria

• diabetes, familial hypercholesterolemia, thyroid and parathyroid diseases, non-specific intestinal diseases, celiac disease, phenylketonuria,
• taking medication for lowering blood lipids such as statins,
• weight loss therapy for 3 months before the intervention,
• allergies and intolerances
• consuming high-proof alcoholic beverages (>2 portions/week)

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

40 participants in 2 patient groups

Intervention group

Experimental group

Description:

Isocaloric diet, based on individual energy requirements calculated from indirect calorimetry and physical activity adjustment Participants will be asked to eat daily \~50g canola oil

Treatment:

Behavioral: Intervention group

Control group

Active Comparator group

Description:

Standard dietary advice that is used as current best practice in the treatment of lipid disturbances of European Society of Cardiology and European Atherosclerosis Society (ESC/EAS) Guidelines for the management of dyslipidemias)

Treatment:

Behavioral: Control group