The Tuna Diet: Is it good for weight loss?

By Dr Jorge Metri (PhD) | Reviewed by Dr Anny Manrich (PhD)

Page last updated: 05/05/2023 | Next review date: 05/05/2025

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The contents of this article are fact-based except otherwise stated within the article.

Author bio

Dr Jorge Metri PhD is a Nutritionist with vast experience in food design with natural ingredients. He also researches sensory sciences and food quality with cutting-edge technologies like Machine Learning. He writes and reviews content on these topics.

Dr Jorge Metri’s highlights:

Invited Reviewer of two international scientific Journals

PhD in Food Science with emphasis on reduced-fat salad dressings with non-animal derived proteins at Universidad De Las Américas Puebla

Diploma in Artificial Intelligence at Universidad Anáhuac, México

Bachelor’s degree in Nutrition at the Universidad Latino

“Science shows its true impact when we make it understandable for everyone” – Dr Jorge Metri PhD.

Professional experience:

Prior to doing his PhD, Jorge Metri worked as an independent nutritionist for almost two years, focusing on sports nutrition to enhance the performance of swimmers and triathletes.

Jorge Metri has worked on several multidisciplinary research projects, including fruit processing, the production of protein-based products, spices, seasonings, jams, and artificial intelligence applied to agriculture production and food quality.

In the food technology area, Jorge Metri has contributed to improving sales and profits of two entrepreneurs of artisanal food products by reformulating their products and standardizing their processes.

Due to the high volume of food production and innovation, the food industry will need new technologies for food characterization in the next years; Jorge Metri is looking for studying such technologies, in 2022, he was selected as a finalist in the IFT FIRST 2022 Food Science event for the Sensory & Consumer Sciences Division Graduate Student Pangborn Oral Competition with the work titled: Machine Learning Models for Mayonnaise Acceptability Prediction.

Education:

2018 – 2023: PhD in Food Science at Universidad De Las Américas Puebla of Puebla, México

2022: Diploma in Artificial Intelligence at Universidad Anáhuac, México

2011 – 2016: Bachelor’s degree in Nutrition at the Universidad Latino of Mérida Yucatán, México.

Main publications of Jorge Metri:

Metri-Ojeda, J., Solana-Lavalle, G., Rosas-Romero, R., Palou, E., & Baigts-Allende, D. (2023). Rapid screening of mayonnaise quality using computer vision and machine learning. Journal of Food Measurement and Characterization, 1-13.

Metri-Ojeda, J., Ramírez-Rodrigues, M., Rosas-Ordoñez, L., & Baigts-Allende, D. (2022). Development and Characterization of a Low-Fat Mayonnaise Salad Dressing Based on Arthrospira platensis Protein Concentrate and Sodium Alginate. Applied Sciences, 12(15), 7456.

Ojeda, J. M., Rodrigues, M. R., & Allende, D. B. (2022). Study of the perception and the acceptability of mayonnaise ingredients among Mexican consumers and its global preference. Revista Española de Nutrición Humana y Dietética, 26.

Metri-Ojeda, J., Nikiforidis, C., Sandoval-Peraza, M., Chel-Guerrero, L., & Baigts, D. (2019). Processing of Amaranthus hypochondriacus biomass for functional protein concentrates development. Journal of Food Research, 8(5), 70-81.

Conference papers:

Allende, D. B., Alva, A. P., Haro, M. S., Martínez, A. S., & Ojeda, J. M. (2020). Bio-plastic polymers from renewable sources. INNOTEC, (19 ene-jun), 97-108

Metri-Ojeda, J. C., Pérez-Alva, A., Recio-Cazares, S. L., & Baigts-Allende, D. K. (2020). Physicochemical and sensorial characterization of vegan mayonnaise using chia seed oil and mucilage (Salvia hipanica L.). Investigación y Desarrollo en Ciencia y Tecnología de Alimentos, 5, 485-489.

You can view some of Dr Metri’s work below and links to his professional profiles:

LinkedIn: https://www.linkedin.com/in/jorge-metri-ojeda/

Research Gate: https://www.researchgate.net/profile/Jorge-Carlos-Metri-Ojeda-2

Google Scholar: https://scholar.google.com/citations?user=SBi5hE8AAAAJ&hl=es

ORCID: https://orcid.org/0000-0002-7333-3688

Dr Jorge Metri (PhD)

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Reviewer bio

Dr Anny Manrich PhD is a food Engineer with expertise in Food Technology, Natural Polymers, Edible Films, Enzymes, and Nanotechnology. She writes and reviews content on these topics.

Dr Anny Manrich’s Highlights:

Research and Technology at the Brazilian Agricultural Research Corporation
PhD in Chemical Engineering with a focus on Biochemistry at the Federal University of Sao Carlos/ Brazil and a one-year scholarship at the Technical University of Munich/ Germany
Bachelor of Food Engineering at the University of Campinas/ Brazil and a one-year scholarship at the Technical University of Munich/ Germany

“To solve a problem, global vision and multifactorial understanding are necessary. Therefore, in addition to expertise, one should seek multidisciplinary thinking connected with science and reality” – Dr Anny Manrich, PhD.

Professional Experience:

Dr Anny Manrich’s Experience Joining the Brazilian Agricultural Research Corporation, as soon as she completed her doctorate,

Dr Anny Manrich has worked on several projects, including the more than three-year partnership project with BRF, a major food producer in Brazil. As a postdoctoral fellow.

Dr Anny Manrich has also contributed to several business consultancies and research projects of the National Nanotechnology Laboratory System in areas such as food technology, fibres, films and coatings and Nanotechnology; in a very determined way, having a great team relationship, being creative and committed.

Growing concerns about the safe introduction of nanomaterials into today’s life emphasises the need to create regulatory documentation in front of characterising, using and testing them. Dr Anny Manrich worked for two years on a characterization project for nanoscale materials, with the aim of exploring their possible health effects.

Despite not having specific academic training in packaging or polymeric films, Dr Anny Manrich works at the Brazilian Agricultural Research Corporation in areas of edible and biodegradable films produced from agricultural waste and in the development of films with greater resistance to water, having articles published in renowned scientific journals, which demonstrates her multidisciplinary understanding and creativity.

In addition, she worked for four years as a consultant to a food company to develop a line of snacks that are healthy and that add functional ingredients, physiologically active compounds that bring health benefits, made from fruits and vegetables, enabling diet improvement, disease prevention and reduction of nutritional deficiencies.

Dr Anny Manrich participated as a member of the examination board for two Master’s exams and one PhD exam at the Department of Chemical Engineering of the Federal University of São Carlos.

Education:

2001 Bachelor in Food Engineering at the State University of Campinas, Brazil
1999 One year scholarship at the Technical University of Munich
2004 Master in Chemical Engineering at the Federal University of São Carlos, Brazil
2012 PhD in Chemical Engineering at the Federal University of São Carlos, Brazil
2010 One year scholarship at the Technical University of Munich

The main publications of Dr. Anny Manrich are:

Articles

Manrich, A., Moreira, F. K., Otoni, C. G., Lorevice, M. V., Martins, M. A., & Mattoso, L. H. (2017). Hydrophobic edible films made up of tomato cutin and pectin. Carbohydrate Polymers, 164, 83-91.

Mendes, J. F., Norcino, L. B., Martins, H. H. A., Manrich, A., Otoni, C. G., Carvalho, E. E. N., … & Mattoso, L. H. C. (2020). Correlating emulsion characteristics with the properties of active starch films loaded with lemongrass essential oil. Food Hydrocolloids, 100, 105428.

Norcino, L. B., Mendes, J. F., Natarelli, C. V. L., Manrich, A., Oliveira, J. E., & Mattoso, L. H. C. (2020). Pectin films loaded with copaiba oil nanoemulsions for potential use as bio-based active packaging. Food Hydrocolloids, 106, 105862.

Manrich, Anny, et al. Immobilization of trypsin on chitosan gels: Use of different activation protocols and comparison with other supports. International Journal of Biological Macromolecules 43.1 (2008): 54-61.

Manrich, Anny; Komesu, Andrea ; Adriano, Wellington Sabino; Tardioli, Paulo Waldir ; Giordano, Raquel Lima Camargo . Immobilization and Stabilization of Xylanase by Multipoint Covalent Attachment on Agarose and on Chitosan Supports. Applied Biochemistry and Biotechnology, v. 161, p. 455-467, 2010.

Mendes, J. F., Martins, J. T., Manrich, A., Neto, A. S., Pinheiro, A. C. M., Mattoso, L. H. C., & Martins, M. A. (2019). Development and physical-chemical properties of pectin film reinforced with spent coffee grounds by continuous casting. Carbohydrate polymers, 210, 92-99..

Milessi, T. S., Kopp, W., Rojas, M. J., Manrich, A., Baptista-Neto, A., Tardioli, P. W., … & Giordano, R. L. (2016). Immobilization and stabilization of an endoxylanase from Bacillus subtilis (XynA) for xylooligosaccharides (XOs) production. Catalysis Today, 259, 130-139.

Mendes, J. F., Norcino, L. B., Manrich, A., Pinheiro, A. C. M., Oliveira, J. E., & Mattoso, L. H. C. (2020). Development, physical‐chemical properties, and photodegradation of pectin film reinforced with malt bagasse fibers by continuous casting. Journal of Applied Polymer Science, 137(39), 49178.

Mendes, J. F., Martins, J. T., Manrich, A., Luchesi, B. R., Dantas, A. P. S., Vanderlei, R. M., … & Martins, M. A. (2021). Thermo-physical and mechanical characteristics of composites based on high-density polyethylene (HDPE) e spent coffee grounds (SCG). Journal of Polymers and the Environment, 29, 2888-2900..

Mendes, J. F., Norcino, L. B., Martins, H. H., Manrich, A., Otoni, C. G., Carvalho, E. E. N., … & Mattoso, L. H. C. (2021). Development of quaternary nanocomposites made up of cassava starch, cocoa butter, lemongrass essential oil nanoemulsion, and brewery spent grain fibers. Journal of Food Science, 86(5), 1979-1996.

Manrich, A., Martins, M. A., & Mattoso, L. H. C. (2021). Manufacture and performance of peanut skin cellulose nanocrystals. Scientia Agricola, 79.

Nascimento, V. M., Manrich, A., Tardioli, P. W., de Campos Giordano, R., de Moraes Rocha, G. J., & Giordano, R. D. L. C. (2016). Alkaline pretreatment for practicable production of ethanol and xylooligosaccharides. Bioethanol, 2(1)..

Manrich, Anny, de Oliveira, J. E., Martins, M. A., & Mattoso, L. H. C. Physicochemical and Thermal Characterization of the Spirulina platensis. J. Agric. Sci. Technol. B, v. 10, p. 298-307, 2020.

Book Chapter

Terra, I. A. A., Aoki, P. H., Delezuk, J. A. D. M., Martins, M. A., Manrich, A., Silva, M. J., … & Miranda, P. B. (2022). Técnicas de Caracterização de Polímeros. Nanotecnologia Aplicada a Polímeros, 614.

Conference Papers

Ferreira, L. F., Luvizaro, L. B., Manrich, A., Martins, M. A., Júnior, M. G., & Dias, M. V. (2017). Comparação da estabilidade de suspensões poliméricas de amido/tocoferol e quitosana/tocoferol. In: CONGRESSO BRASILEIRO DE POLÍMEROS, 14., 2017, Águas de Lindóia, SP.

Manrich, A., Hubinger, S. Z., & Paris, E. C. (2017). Citotoxicidade causada por nanomateriais: avaliação do micronúcleo. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 9., 2017, São Carlos. Anais… São Carlos: Embrapa Instrumentação, 2017. p. 655-658.

Manrich, Anny, et al. Immobilization and Stabilization of Xylanase by multipoint covalent attachment on Glyoxyl Agarose Support. The 31st Symposium on Biotechnology for Fuels and Chemicals. 2009.

Manrich, Anny, et al. Application of immobilized xylanase on hydrolysis of soluble wood hemicelluloses after using microwave and organosolv pre-treatments. The 32nd Symposium on Biotechnology for Fuels and Chemicals. 2010.

You can view some of Dr Anny’s work below and links to her professional profile.

Research Gate: https://www.researchgate.net/profile/Anny-Manrich-2

Scopus: https://www.scopus.com/authid/detail.uri?authorId=23103497100

Google Scholar: https://scholar.google.com/citations?hl=en&user=Ea9qpr0AAAAJ

Linkedin: https://br.linkedin.com/in/anny-manrich-20693129

Dr Anny Manrich (PhD)

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This brief guide will answer the query “The Tuna Diet: Is it good for weight loss?”. Moreover, it presents another option for weight loss, and it will explain the role of proteins in your body. After briefly reviewing the health benefits and potential risks of Tuna, this guide will finish with some Tuna recipes you can adopt in your meal plan.

The Tuna Diet: Is it good for weight loss?

Yes, the tuna diet is good for weight loss, but it involves many health risks; actually, it is not an official diet. And as you will read in this guide, tuna may contain toxins like mercury, harmful if you consume it frequently or in high quantities (1).

So you should look for other alternative diets for weight loss. Keep reading to know more about them and more about tuna.

What are the Potential Drawbacks and Risks of the Tuna Diet?

Tuna is known for being a fish with high concentrations of mercury, being this the main risk to your health. Mercury could be poisonous and affect your neural system, it could even be lethal for you (1).

Actually, the FDA has advised to not eat more than 3 servings of tuna a week (2). You can find more information about this in the following link.

Additionally, tuna is missing in some other nutrients like B vitamins, vitamin C, and fiber. A deficiency of B vitamins can increase the risks of neurological problems, limited cognitive development (3).

In the case of vitamin C, its deficiency will increase your risks of getting sick because it is needed for a strong immune system (3).

Fiber is a non-digestible nutrient, it is very important for your gastrointestinal health. So, a low consumption of fiber can increase your risk of constipation and gut’s inflammation (4).

What other alternative can you choose for weight loss?

The tuna diet consists of consuming a lot of protein and very few fats and carbohydrates. This kind of meal plan can be easily replaced by a keto diet or just a low-carb and high-protein diet. These diets are recognized by nutritionists (5).

A keto diet is focused on consuming mostly proteins and fats, with a minimum intake of carbohydrates. A high-protein diet could be done with or without carbohydrate restrictions. The following table shows a brief overview of the macronutrients’ distribution in each diet (6,7).

	Carbohydrates	Fats	Protein
Keto diet	10 %	75 %	15 %
High-protein diet	35 – 50 %	20 – 35 %	30 %
High-protein and low-carb diet	10 %	60 %	30 %

Adapted from Poorshiri et al. (5) and Manore (6).

What is the role of proteins in weight loss?

Proteins can help you for weight loss because they can make you feel more satiety; when proteins reach your gut, they are transformed by your metabolism to form neuropeptides, which can regulate your appetite (7).

All these mechanisms are helpful for reducing your calorie intake, remember that weight loss is achieved when you use more energy than the energy you consume. So, you can achieve this with the effects of proteins (7).

What are the Nutritional Benefits of Tuna?

The main nutritional benefit of tuna is its high quality proteins. Similar to almost all animal derived foods, tuna’s protein contains all essential amino acids. These amino acids are needed for building strong muscles, organs and tissues, immune cells, and even hormones (8).

Tuna also have unsaturated lipids which can be helpful for your health. Omega-3 fatty acids could be cardio-protective, anti-inflammatory, and antioxidant; you can get these nutrients in tuna! (9)

There are two special fatty acids which are beneficial for children’s neurological development and also for preventing diseases like Alzheimer and Parkinson. These are also found in tuna, the docosahexaenoic acid (DHA) and the eicosapentaenoic acid (EPA) (10).

Regarding other micronutrients, tuna is rich in Manganese and Zinc. Manganese is a mineral with roles in neurological regulation, actually, is needed for the correct synapsis of your neurons (11).

Zinc, on the other hand, is helpful for growth and development in children, and also can strengthen your immune system. Therefore, your immune cells will be strong against diseases (12).

How to Combine Tuna with Other Healthy Foods?

Here you can look for a lot of tuna recipes which include several healthy foods; for instance, you will find legumes, eggs, vegetables, pasta, and more. Remember that a healthy diet includes all food groups, they are important for obtaining all nutrients (13).

Conclusion

This brief guide answered the query “The Tuna Diet: Is it good for weight loss?”. Moreover, it presented another option for weight loss, and it explained the role of proteins in your body. After briefly reviewing the health benefits and potential risks of Tuna, this guide finished with some Tuna recipes you can adopt in your meal plan.

References

Alva CV, Mársico ET, Ribeiro R de OR, Carneiro C da S, Simões JS, Ferreira M da S. Concentrations and health risk assessment of total mercury in canned tuna marketed in Southest Brazil. J Food Compost Anal, 2020;88(103357):103357.

Advice about eating fish [Internet]. U.S. Food and Drug Administration. FDA; [cited 2 May 2023]. Available from: https://www.fda.gov/food/consumers/advice-about-eating-fish

Kaidar-Person O, Person B, Szomstein S, Rosenthal RJ. Nutritional deficiencies in morbidly obese patients: a new form of malnutrition? Part A: vitamins: Part A: Vitamins. Obes Surg, 2008;18(7):870–6.

Snauwaert E, Paglialonga F, Vande Walle J, Wan M, Desloovere A, Polderman N, et al. The benefits of dietary fiber: the gastrointestinal tract and beyond. Pediatr Nephrol, 2022.

Poorshiri B, Barzegar M, Tahmasebi S, Shiva S, Raeisi S, Ebadi Z. The efficacy comparison of classic ketogenic diet and modified Atkins diet in children with refractory epilepsy: a clinical trial. Acta Neurol Belg, 2021;121(2):483–7.

Manore MM. Exercise and the Institute of Medicine recommendations for nutrition. Current sports medicine reports, 4(4), 193-198.

Kim JY. Optimal diet strategies for weight loss and weight loss maintenance. J Obes Metab Syndr, 2021;30(1):20–31.

Shevkani K, Chourasia S. Dietary proteins: Functions, health benefits and healthy aging. In: Healthy Ageing and Longevity. Cham: Springer International Publishing; 2021. p. 3–37.