Relation
Farhangi MA, Dehghan P, Tajmiri S, Abbasi MM. The effects of Nigella sativa on thyroid function, serum vascular endothelial growth factor (VEGF)-1, nesfatin-1 and anthropometric characteristics in patients with Hashimoto's thyroiditis: a randomized controlled trial.BMC Complement Aging Med. 2016;16:471.
Draft
Double-blind, placebo-controlled study
Participant
Forty participants aged 22 to 50 years with Hashimoto's thyroiditis; 85% were women. All patients were treated with a stable dose of levothyroxine from 6 weeks before participation until the end of the study. Initially, 47 participants were included in the study; However, 4 in the control group refused to continue the experiment and 3 in theNigellaGroup dropped out due to itching and nausea.
Participants were excluded if they were pregnant or breastfeeding; had other thyroid abnormalities or a history of thyroid surgery; or have taken other nutritional supplements or a specific diet program for 3 months before or during the study.
Study parameters assessed
Participants were randomized into 2 groups; the test group received 1 gram of encapsulated massNigella sativaSeeds and the placebo group received similar pure starch capsules. capsules (possiblyNigellaor placebo) were taken twice daily for 8 weeks.
Primary outcome measures
Anthropometric measurements
Body weight, body mass index (BMI), waist circumference (WC), hip circumference (HC) and waist-to-hip ratio (WHR). Diet records were analyzed at the beginning and end of the study to determine whether calorie and nutrient intakes would change.
Biochemical measures
Serum concentrations of thyroid stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4), antibodies to thyroid peroxidase (TPO), vascular endothelial growth factor (VEGF), nesfatin-1.
Key insights
After 8 weeks of treatment, participants in theNigellagroup saw a significant reduction in all anthropometric values, while no significant change was seen in the placebo group. Calorie or nutrient intake between the start and end of the study did not change significantly in any group.
After 8 weeks of treatment, participants in the Nigella group saw a significant reduction in all anthropometric values.
Participants in the Nigella group also saw an overall reduction in serum TSH (from 6.42 ± 3.86 to 4.13 ± 2.35,P= 0.03) and anti-TPO antibodies (from 294.55 ± 210.05 to 147.99 ± 158.33,P=0.019) and an increase in T3 levels. Concentrations of VEGF also decreased overall and were found to be dependent on changes in WHR. No significant change in nesfatin-1 levels was detected in either group.
Practice implications
As a holistic provider, I often see patients in the office seeking treatments to address the root cause of their autoimmune thyroid disease. As we all know, precipitating factors in autoimmune diseases can be variable and difficult to pinpoint, and the process of identifying and correcting them will be very individual. In addition to thyroid hormone replacement therapy, holistic treatment for autoimmune thyroid problems is often multifactorial and may address nutritional and lifestyle factors and utilize natural therapies to support the thyroid and reduce the inflammatory process. With this in mind, the present study presents a plant medicine that can help reduce the inflammatory process while helping to remove any other obstacles to healing.
Nigella sativais an annual flower in the buttercup family with a number of common names including black cumin, onion seed and black cumin. It has been used as a culinary spice and medicine in Asia and the Middle East for thousands of years. It is mentioned in the Bible, and there is an Islamic belief that it can prevent every disease except death. In the last 2 decades, many studies have been carried out that have shownNigella sativamay positively impact a variety of diseases, although the current study appears to be the first to be investigatedNigellaEffects on Hashimoto's thyroiditis.
The primary active ingredient isolates fromNigella sativais thymoquinone. Thymoquinone has been shown to act as a potent antioxidant and anti-inflammatory in many contexts and conditions, including cancer, diabetes, hyperlipidemia, allergies and other autoimmune diseases.1-9In rat studies, thymoquinone showed a protective effect against induced oxidative damage.10,11Given these effects in the body, it makes sense to consider the therapeutic potential of this plant in autoimmune thyroid diseases.
The antioxidant and anti-inflammatory effects ofNigella sativaappear to have contributed to the positive outcome of this study through some proposed mechanisms. One of these is increased lipolysis and decreased lipogenesis resulting from a decrease in VEGF: several studies have shown that thymoquinone reduces VEGF levels.12,13Elevated VEGF has been found in people with chronic thyroiditis and thyroid cancer, and increased TSH levels increase the production of VEGF.14.15Vascular endothelial growth factor is also associated with metabolic syndrome and obesity because it dilates the vasculature to fatty tissue. The authors of this study postulate that by reducing VEGF, blood supply to the thyroid and adipose tissue also decreases, leading to a reduction in inflammation in the thyroid and a reduction in fat stores.
Thymoquinone has also been shown to increase heme oxygenase, which reduces inflammation, particularly in the vascular endothelium.16,17Increased heme oxygenase is another proposed mechanism in this study for reduced inflammation in the thyroid, leading to reduced anti-TPO antibodies and increased T3 levels.
In general,Nigellahas low toxicity and has been described as well tolerated. However, there are case reports that some people do not digest it well. Also remember that 3 people dropped out of the treatment group (n = 23) because they developed a rash; 13% is a fairly large proportion of subjects showing signs of sensitivity, and there have been other reports of hypersensitivity reactions to topical applicationNigella sativaApplications.18.19When using this plant, it would be advisable to tell patients to watch for signs of hypersensitivity.
clinical,Nigella sativacould be a useful addition to the holistic treatment of Hashimoto's thyroiditis. It reduces inflammation, helps lower TSH and anti-TPO, and increases T3. It also helps reverse some of the weight gain associated with hypothyroidism. It can be used as a powerful element of a holistic approach to restoring the endocrine and immune systems to optimal health.
