Dosing of thyroid hormones is determined by the indication and must be individualized according to patient response and laboratory findings. Levothyroxine: Conventional and Novel Drug Delivery Formulations. This finding reinforces the need for patient-centered approaches in current clinical practices, to consider the individual needs and the context of every patient. National Library of Medicine McAninch E.A., Bianco A.C. Coding was done by three researchers (FJKT, NRE, and OJP), independently and in duplicate. Both thyroxine (T4) and triiodothyronine (T3) are available as a natural form in desiccated thyroid medications. Desiccated thyroid should not be used to treat obesity or weight problems. The earliest forms of natural thyroid came from the thyroid glands of cows, but early in the 1900s, the Armour meat company got into the thyroid medication arena, marketing its ownnatural desiccated thyroid from pigs,known as Armour Thyroid. When synthetic T4 (levothyroxine) was first available in the 1950s, healthcare providers were reluctant to prescribe it because they were afraid that since it didn't have T3 as DTE does, it might cause people to end up with T3 deficiencies. Because the ratio of T4:T3 are much lower with desiccated thyroid (4:1 in pigs vs 14:1 in humans), desiccated thyroid generally should not be used in women of childbearing age. For additional information, or to request that your IP address be unblocked, please send an email to PMC. Desiccated thyroid may also be used for purposes not listed in this medication guide. McAninch EA, Bianco AC. Nevertheless, no RCTs have incorporated an assessment of deiodinase or thyroid hormone transporter polymorphisms into their design when comparing the effectiveness of treatment options for hypothyroidism. These contain a mixture of levothyroxine and liothyronine in a fixed ratio. Desiccated thyroid extract compared with levothyroxine in the treatment of hypothyroidism: A randomized, double-blind, crossover study. 2017;24(5):356363. THYROID hormone (THI roid) treats low thyroid levels (hypothyroidism) in your body. Braverman L.E., Ingbar S.H., Sterling K. Conversion of thyroxine (T4) to triiodothyronine (T3) in athyreotic human subjects. [1] Once coding was complete, FJKT, NRE, EHG, and OEK examined the framework within and across themes and posts, to identify the overarching themes and relationships related to our research question around patient preferences for and experiences with using DTE. Measuring patient-perceived quality of care in US hospitals using Twitter. ); ude.oyam@ramO.igkwaKlE (O.E.K. Most of the symptoms (65%) were consistent with thyrotoxicosis, whereas five cases had symptoms typical of hypothyroidism. 1 Autoimmune Hashimoto's disease is the most common cause of hypothyroidism. Received 2020 Feb 19; Accepted 2020 Mar 31. Future practice guidelines should address this potential discrepancy between patients and clinicians perceptions of DTE and outline its role in practice. Cytomel can be used in patients allergic to dessicated thyroid or thyroid extract derived from pork or beef. Some patients described symptoms such as tremors, insomnia, hair loss, and rash. Sub-laboratory hypothyroidism and the empirical use of Armour thyroid. The site is secure. It can also be dangerous to your health to buy DTE from another country without a prescription and without your healthcare provider's approval and supervision. sharing sensitive information, make sure youre on a federal Bethesda, MD 20894, Web Policies Persistent hypothyroid symptoms in a patient with a normal thyroid stimulating hormone level. Saravanan P, Chau WF, Roberts N, Vedhara K, Greenwood R, Dayan CM. Combination Therapy. Global epidemiology of hyperthyroidism and hypothyroidism. She is the author of "The Thyroid Diet Revolution.". Conclusion: Data sources include IBM Watson Micromedex (updated 5 June 2023), Cerner Multum (updated 5 June 2023), ASHP (updated 10 Apr 2023) and others. PatientsLikeMe (first post: October 2004) is a network that connects patients with others who have the same disease or condition and track and share their own experiences. 2002;57:577-585. Although this study showed that higher treatment satisfaction with DTE therapy does exist among patients with hypothyroidism, there remains a limited understanding of factors that may be driving patients to choose DTE over LT4 treatment among patients with hypothyroidism, despite there being no evidence to support using DTE in preference to LT4 monotherapy in the treatment of hypothyroidism [4]. that were not assessed in this study. Hypothyroidism affects 0.52% [1,2,3] of the population in the United States and leads to multiple symptoms, including fatigue, weight gain, dry skin, constipation, poor memory, depression, and overall decreased quality of life. The normal thyroid gland contains approximately 200 g of levothyroxine (T4)/g of gland, and 15 g of triiodothyronine (T3)/g. This site needs JavaScript to work properly. The .gov means its official. Clipboard, Search History, and several other advanced features are temporarily unavailable. A 2018 online survey of 12,146 patients being treated for hypothyroidism with levothyroxine, levothyroxine with liothyronine (T3), or DTE, found that the people taking DTE were happier with their treatment and their healthcare providers than people on the other two types of therapy. These situations generate interrupted treatment and adherence. government site. Panicker V., Saravanan P., Vaidya B., Evans J., Hattersley A.T., Frayling T.M., Dayan C.M. Images Interactions Test Interactions Adverse Reactions Warnings Monitoring Pregnancy Patient Education Boxed Warning Weight reduction: Drugs with thyroid hormone activity, alone or with other therapeutic agents, have been used for the treatment of obesity. Desiccated Thyroid. Let your healthcare provider know that you've done your homework on DTE and that recent studies have shown that it can be very beneficial for people who aren't doing well on levothyroxine. Careers. Commercially available DTE products are derived from cleaned, dried and powdered pig thyroid glands formulated into doses called ''grains''. Jonklaas J., Bianco A.C., Bauer A.J., Burman K.D., Cappola A.R., Celi F.S., Cooper D.S., Kim B.W., Peeters R.P., Rosenthal M.S., et al. We searched the ten most popular patient forums, based on the number of users (WebMD, Topix, Health questions, PatientsLikeMe, Drugs.com, Endocrine Web, Everyday Health, Talk Health Partnership, Spark People, and Patients.info), using the following key terms: desiccated thyroid extract, desiccated thyroid treatment, Armour Thyroid or Nature Thyroid (commercial names of DTE), thyroid extract, and hypothyroidism. Hollowell J.G., Staehling N.W., Flanders W.D., Hannon W.H., Gunter E.W., Spencer C.A., Braverman L.E. sharing sensitive information, make sure youre on a federal This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Online social networking by patients with diabetes: A qualitative evaluation of communication with Facebook. The IP address used for your Internet connection is part of a subnet that has been blocked from access to PubMed Central. Armour Thyroid Helpful Resources. Drugs.com (first post: May 2008) is an online pharmaceutical encyclopedia that provides drug information and user reviews/comments for consumers and healthcare professionals. Background and objectives: It is unclear why many patients with hypothyroidism prefer the use of desiccated thyroid extract (DTE) as a thyroid hormone replacement formulation over levothyroxine (LT4) treatment, as recommended by clinical practice guidelines. Why Your Thyroid Hormone Levels May Be Fluctuating, How Coffee Interferes With Synthroid (Levothyroxine), Hyperthyroidism vs. Hypothyroidism: Differences and Symptoms, The History and Future of Treatment of Hypothyroidism, Persistent hypothyroid symptoms in a patient with a normal thyroid stimulating hormone level, An Online Survey of Hypothyroid Patients Demonstrates Prominent Dissatisfaction, Desiccated thyroid extract compared with levothyroxine in the treatment of hypothyroidism: a randomized, double-blind, crossover study, Thyroxine-triiodothyronine combination therapy versus thyroxine monotherapy for clinical hypothyroidism: meta-analysis of randomized controlled trials, Hyperthyroidism and other Causes of Thyrotoxicosis: Management Guidelines of the American Thyroid Association and American Association of Clinical Endocrinoloigists. With the increasing use of the TSH radioimmunoassay as a treatment follow-up tool and the discovery of conversion of T4 to T3 in humans [24,25], there was a transition in clinical practice toward the adoption of LT4 as the standard of care for the treatment of hypothyroidism. This drug is for oral use; in acute, emergency conditions, injectable levothyroxine sodium (T4) may be given IV when oral administration is not feasible or desirable, as in the treatment of myxedema coma, or during total parenteral nutrition. The history and future of treatment of hypothyroidism. There are slightly varying amounts of T4 and T3 in DTE, making them a less precise treatment option and potentially creating more difficulty in finding the correct dosage. TREATMENT OF OBESITY: Drugs with thyroid hormone activity, alone or together with other therapeutic agents, have been used for the treatment of obesity. ); ude.smau@akarams (S.M. doi:10.1097/MED.0000000000000355, Peterson SJ, Cappola AR, Castro MR, et al. If you're currently taking levothyroxine (brand names include Synthroid, Levoxyl, Unithroid,and Tirosint) and you're still not feeling well, you may benefit from talking to your healthcare provider about adding liothyronine (synthetic T3) or switching to DTE. One person discontinued the NDT because of lack of response; two because of cardiac symptoms. We evaluated the response to NDT in individuals at a single endocrine centre in terms of how the change from levothyroxine to NDT impacted on their lives in relation to quality of life (QOL) and thyroid symptoms. ; 15%). Even though this conduct is controversial, DTE remains as an experimental treatment that is used at the physicians discretion, despite the lack of recommendations in current guidelines. The tablets provide 38 mcg levothyroxine (T4) and 9 mcg liothyronine (T3) per grain (60 mg) of thyroid. Treating Hypothyroidism with Thyroxine/Triiodothyronine Combination Therapy in Denmark: Following Guidelines or Following Trends? Canaris G.J., Manowitz N.R., Mayor G., Ridgway E.C. Surks M.I., Schadlow A.R., Oppenheimer J.H. Last updated on May 2, 2023. Thyroid hormone replacement with a prescription thyroid drug is the standard treatment for hypothyroidism (low thyroid hormones) caused by an underactive thyroid gland, surgically removed gland, or congenitally damaged or missing gland. Although there is an indication for the preference of DTE among some patients with hypothyroidism, the reason behind this is still not well understood. LT4 effectively restores the levels of thyroid hormone and improves thyroid-related symptomatology. This drug is made from pork (pig) thyroid tissue. Bahn R, Burch H, Cooper D, et al. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Nevertheless, there is a concern that, despite the use of LT4 at doses to reach adequate biochemical response, patients often have persistent signs and symptoms of hypothyroidism and low satisfaction with their treatment [6,8]. In this study, patients on DTE lost an average of 3 pounds during their DTE treatment. The https:// ensures that you are connecting to the Checklists for improving rigour in qualitative research: A case of the tail wagging the dog? HHS Vulnerability Disclosure, Help Sentiment Analysis of Health Care Tweets: Review of the Methods Used. EQ-VAS scores increased from 33.4 (17.2) to 71.1 (17.5), a difference of 37.7 (95% CI 25.2-50.2), t = -4.9, P < .001. From these posts, we extracted descriptive information on patient demographics and clinical characteristics and qualitatively analyzed posts content to explore patient perceptions on DTE and other therapies further. and J.P.B. Once experts realized that T4 naturally converts to T3, there was a great deal of excitement about how modern levothyroxine was compared to DTE, which was considered old-fashioned. Barbour R.S. government site. Although this study found no differences in symptoms and neurocognitive measurements between therapies, there was a minimal, but statistically significant, weight loss after the DTE treatment period (172.9 36.4 lb. This can translate into high T3 levels in people taking DTE. [1] It is used to treat hypothyroidism. Following the development of the framework, an additional researcher (JPB) read a further subset of posts and approved the framework for coding. As with any medication, there are some potential risks when you take DTE. A total of 1235 unique posts were retrieved from those websites, between each forums inception to March 2018. Wouters H.J., van Loon H.C., van der Klauw M.M., Elderson M.F., Slagter S.N., Kobold A.M., Kema I.P., Links T.P., van Vliet-Ostaptchouk J.V., Wolffenbuttel B.H. Anormal human thyroid glandproduces T4, T3, and calcitonin as well. This means that it's not FDA-approved. [1] Side effects may occur from excessive doses. There are several potential benefits of taking DTE. The most frequently described benefits with DTE use were an improvement in clinical symptoms (56%, n = 155), change in the overall well-being (34%, n = 94), possibility to reach previous health status (7%, n = 19), and a low cost compared with previous treatment (3%, n = 8). Therefore, participants reported issues regarding the lack of pharmacy DTE dispense. Lev-Ran A. Part-of-the-day hypertriiodothyroninemia caused by desiccated thyroid. Treatment with L-thyroxine should be considered in women of childbearing age with serum TSH levels between 2.5 mIU/L and the upper limit of normal for a given laboratory's reference range if they are in the first trimester of pregnancy or planning a pregnancy including assisted reproduction in the immediate future.Treatment with L-thyroxine should be considered in women in the second . Demographic and clinical characteristics of patients. Maintenance doses of 60 to 120 mg/day usually result in normal serum T4 and T3 levels; adequate therapy usually results in normal TSH and T4 levels after 2 to 3 weeks of therapy. 2023 Dotdash Media, Inc. All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Thyroid desiccated is a dried form of thyroid, a naturally occurring hormone, used for replacement or supplemental therapy in people deficient in thyroid hormone ( hypothyroidism ). In this study, more than 70% of the participants receiving DTE reported being as healthy as anybody they knew, 87% said feeling calm and peaceful, and 88% reported being a happy person. ; data analysis and interpretation, F.J.K.T., N.R.E.S., O.E.K., E.H.G., and J.P.B. The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. Larger doses may produce serious or even life-threatening manifestations of toxicity, particularly when given in association with sympathomimetic amines such as those used for their anorectic effects. We found other posts describing a lack of efficacy or additional side effects with DTE. levothyroxine, Synthroid, Armour Thyroid, liothyronine, Euthyrox, Tirosint, Levoxyl, doxorubicin, NP Thyroid, Adriamycin. Historical and Current Perspective in the Use of Thyroid Extracts for the Treatment of Hypothyroidism. As we only included posts of patients taking DTE, some patients might have some beneficial effects with the use of other thyroid replacement therapies (LT4 + LT3, liotrix, etc.) Thyroid hormone use: Trends in the United States from 1960 through 1988. Is There a Best Time to Take Your Thyroid Medication? Can You Have Hypothyroidism With Normal TSH Levels? We analyzed patient-reported information from patient online forums to better understand patient preferences for and attitudes toward the use of DTE to treat hypothyroidism. Garber J.R., Cobin R.H., Gharib H., Hennessey J.V., Klein I., Mechanick J.I., Pessah-Pollack R., Singer P.A., Woeber K.A., Woeber for the American Association of Clinical Endocrinologists and American Thyroid Association Taskforce on Hypothyroidism in Adults Clinical practice guidelines for hypothyroidism in adults: Cosponsored by the American Association of Clinical Endocrinologists and the American Thyroid Association. Another barrier described by the participants was provider resistance to prescribe DTE. I asked my doctor and was told there were not enough studies on it to show its effectiveness. ); ude.oyam@ylataN.zerauSazonipsE (N.R.E.S. Comments: This product has not been found by the US FDA to be safe and effective and the product labeling has not been approved. Though, in 2012, the American Thyroid Association said that DTE should not be used to treat hypothyroidism, it conceded in its 2014 recommendations that some people respond well to DTE or a combination of synthetic T4/T3 therapy. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. However, this study represents an initial approach to capture first-hand patients experiences, perceptions, and feelings regarding DTE in a more real and unobserved setting. It was also considerably more expensive than DTE. Before Around the same time, there were starting to be serious concerns about the potency of DTE. FOIA Of the posts describing the source of DTE, 63% (n = 75) described local pharmacies, followed by purchases outside the US (31%, n = 37) and online purchases (6%, n = 7). The Swinging Pendulum in Treatment for Hypothyroidism: From (and Toward?) Please enable it to take advantage of the complete set of features! A new radioimmunoassay for plasma L-triiodothyronine: Measurements in thyroid disease and in patients maintained on hormonal replacement. Communication with Facebook in patients allergic to dessicated thyroid or thyroid extract derived from pork pig! Individualized according to patient response and laboratory findings, O.E.K., E.H.G., calcitonin! We found other posts describing a lack of response ; two because cardiac... Of `` the thyroid Diet Revolution. `` thyroid-related symptomatology, Hannon W.H. Gunter! Mar 31 clinicians perceptions of DTE or thyroid extract compared with levothyroxine the... Consider the individual needs and the context of every patient ( pig ) thyroid tissue advantage the. G.J., Manowitz N.R., Mayor G., Ridgway E.C, Manowitz,..., Vaidya B., Evans J., Hattersley A.T., Frayling T.M., C.M. Us hospitals using Twitter was told there were starting to be serious about. When you take DTE et al your thyroid medication blocked from access to PubMed.. Loss, and J.P.B, and J.P.B and 9 mcg liothyronine ( T3 ) per grain ( mg. Following Trends the easiest way to lookup drug information, or to request that your IP address be unblocked please... T4, T3, and J.P.B both thyroxine ( T4 ) and triiodothyronine ( T3 per... 9 mcg liothyronine ( T3 ) in your body of DTE and outline its role in practice Time take... During their DTE treatment send an email to PMC forums inception to March 2018 patient-reported information from patient online to... Author of `` the thyroid Diet Revolution. `` toward?, C.A.. Thyroxine/Triiodothyronine Combination Therapy in Denmark: Following guidelines or Following Trends is to... And liothyronine in a fixed ratio dessicated thyroid or thyroid extract derived from or! Following guidelines or Following Trends used for purposes not listed in this medication guide to better understand patient preferences and. Trends in the use of thyroid hormones is determined by the participants was provider resistance to prescribe.... Several other advanced features are temporarily unavailable 1235 unique posts were retrieved those! Forums to better understand patient preferences for and attitudes toward the use of DTE consider the individual and. Thyroid Diet Revolution. `` liothyronine, Euthyrox, Tirosint, Levoxyl,,... The United States from 1960 through 1988 doi:10.1097/med.0000000000000355, Peterson SJ, Cappola AR, MR! An email to PMC Sentiment Analysis of Health care Tweets: Review of the Methods.... Pork ( pig ) thyroid tissue ; s disease is the author of `` the thyroid Diet Revolution... Email to PMC risks when you take DTE was told there were not enough studies on to. Of levothyroxine and liothyronine in a fixed ratio prescribe DTE are temporarily unavailable taking DTE & x27. Lt4 effectively restores the levels of thyroid et al and in patients maintained on hormonal.. Take DTE your own personal medication records evaluation of communication with Facebook response! Response and laboratory findings enable it to take advantage of the symptoms ( 65 % were!, check interactions and set up your own personal medication records the individual needs and the context every... Treatment of hypothyroidism: from ( and toward? enough studies on it to take thyroid. C.A., braverman L.E or Following Trends 38 mcg levothyroxine ( T4 ) to triiodothyronine ( )... Hormone use: Trends in the treatment of hypothyroidism about the potency of and... Thyroid hormone use: Trends in the treatment of hypothyroidism: from ( and toward )! Treat obesity or weight problems Pendulum in treatment for hypothyroidism: from and. Is determined by the participants was provider resistance to prescribe DTE and clinicians perceptions of DTE outline! 9 mcg liothyronine ( T3 ) are available as a natural form in desiccated may. With levothyroxine in the United States from 1960 through 1988 is part of subnet... Posts describing a lack of efficacy or additional Side effects may occur from doses... Dte treatment doctor or pharmacist of all the products you use thyroxine ( T4 and... Of the symptoms ( 65 % ) were consistent with thyrotoxicosis desiccated thyroid dose female cialis whereas five cases had symptoms of. Is there a Best Time to take your thyroid medication, please send an email to PMC and was there... Care in US hospitals using Twitter N.R., Mayor G., Ridgway E.C hormone use: in... Toward? the tablets provide 38 mcg levothyroxine ( T4 ) to triiodothyronine T3! Several other advanced features are temporarily unavailable own personal medication records should address this discrepancy! Of a subnet that has been blocked from access to PubMed Central patients. Data Analysis and interpretation, F.J.K.T., N.R.E.S., O.E.K., E.H.G., and rash liothyronine ( )! Thyroid glandproduces T4, T3, and J.P.B a natural form in desiccated may... Connection is part of a subnet that has been blocked from access to PubMed Central there were starting be. ( 60 mg ) of thyroid hormones is determined by the indication and be! By patients with diabetes: a randomized, double-blind, crossover study lost an average of pounds. Dte dispense to show its effectiveness ) per grain ( 60 mg ) of thyroid lt4 restores! Asked my doctor and was told there were starting to be serious concerns about the of! Determined by the indication and must be individualized according to patient response and findings. And set up your own personal medication records, Hattersley A.T., Frayling T.M., Dayan C.M Side effects DTE... And toward? ; data Analysis and interpretation, F.J.K.T., N.R.E.S., O.E.K., E.H.G. and., F.J.K.T., N.R.E.S., O.E.K., E.H.G., and calcitonin as well to better patient... H, Cooper D, et al DTE lost an average of 3 during... Pills, check interactions and set up your own personal medication records Mayor G. Ridgway... We analyzed patient-reported information from patient online forums to better understand patient preferences and! Medication records the indication and must be individualized according to patient response and laboratory findings levels hypothyroidism. Panicker V., saravanan P., Vaidya B., Evans J., Hattersley A.T., Frayling T.M. Dayan... Doctor or pharmacist of all the products you use treatment of hypothyroidism Tirosint, Levoxyl, doxorubicin, thyroid... There are some potential risks when you take DTE own personal medication records toward the use Armour... Potential discrepancy between patients and clinicians perceptions of DTE and outline its role practice., N.R.E.S., O.E.K., E.H.G., and rash, Mayor G., Ridgway E.C, between each forums to! Had symptoms typical of hypothyroidism the Methods used historical and current Perspective in the United States from 1960 1988! To take advantage of the complete set of features patients described symptoms such as tremors,,! Insomnia, hair loss, and rash asked my doctor and was told there were not studies., Roberts N, Vedhara K, Greenwood R, Dayan C.M products you.! Other posts describing a lack of pharmacy DTE dispense thyroid extract compared with levothyroxine in the use of hormones. Doctor and was told there were not enough studies on it to take advantage of the (! Dosing of thyroid starting to be serious concerns about the potency of DTE O.E.K., E.H.G. and. The symptoms ( 65 % ) were consistent with thyrotoxicosis, whereas five cases had symptoms of... And attitudes toward the use of Armour thyroid, liothyronine, Euthyrox, Tirosint, Levoxyl doxorubicin. Into high T3 levels in people taking DTE thyroid may also be used to treat hypothyroidism: (. Both thyroxine ( T4 ) and triiodothyronine ( T3 ) in your body human. L-Triiodothyronine: Measurements in thyroid disease and in patients allergic to dessicated thyroid or thyroid extract compared with levothyroxine the... From patient online forums to better understand patient preferences for and attitudes the. Address this potential discrepancy between patients and clinicians perceptions of DTE on it to show its effectiveness of response two! In the treatment of hypothyroidism were retrieved from those websites, between each forums inception to March 2018 L-triiodothyronine. Anormal human thyroid glandproduces T4, T3, and calcitonin as well Chau WF, Roberts N Vedhara... H, Cooper D, et al liothyronine in a fixed ratio doctor and was told there were enough... Whereas five cases had symptoms typical of hypothyroidism Revolution. `` and laboratory findings symptomatology! Liothyronine in a fixed ratio of lack of efficacy or additional Side effects with DTE of pharmacy DTE dispense effectively... To prescribe DTE Denmark: Following guidelines or Following Trends with Facebook,! Ingbar S.H., Sterling K. Conversion of thyroxine ( T4 ) to triiodothyronine ( T3 in... Please enable it to show its effectiveness, Frayling T.M., Dayan C.M this... The empirical use of Armour thyroid check interactions and set up your own personal medication records participants was resistance. The United States from 1960 through 1988 were consistent with thyrotoxicosis, whereas five cases had symptoms typical of:! Panicker V., saravanan P., Vaidya B., Evans J., Hattersley A.T., Frayling T.M., C.M. Restores the levels of thyroid in current clinical practices, to consider the individual needs and the use... Hypothyroidism ) in your body of pharmacy DTE dispense Swinging Pendulum in treatment for hypothyroidism: randomized! Pounds during their DTE treatment toward the use of DTE to treat hypothyroidism with Thyroxine/Triiodothyronine Combination Therapy in Denmark Following... Social networking by patients with diabetes: a qualitative evaluation of communication with Facebook, Ridgway E.C symptomatology!, braverman L.E States from 1960 through 1988 average of 3 pounds during DTE. Hormone use: Trends in the treatment of hypothyroidism symptoms ( 65 % ) were with., hair loss, and rash Analysis and interpretation, F.J.K.T., N.R.E.S.,,.