Diet and Lifestyle Approaches Studied in Graves’ Disease: What the Evidence Says

Short answer

There is no diet or lifestyle approach that has been proven to treat Graves’ disease. (Wiersinga, 2019)

Some strategies – such as adequate protein intake, calcium and vitamin D, and avoiding excess iodine – are supported by clinical evidence. Others, including gluten-free or anti-inflammatory diets, have limited or inconsistent evidence.

Diet and lifestyle approaches studied in Graves’ disease (evidence overview)

Important: These approaches come from individual case reports and small studies, not a standardised or proven treatment protocol.

The following sections group commonly discussed approaches by the strength of evidence in Graves’ disease.

Approaches with the strongest evidence

Calcium and vitamin D

Focus on adequate calcium-rich foods (e.g. dairy or fortified plant milks, leafy greens, fortified cereals) and maintaining sufficient vitamin D status.

These nutrients are important for bone protection in hyperthyroidism, where increased bone turnover can lead to bone loss. Ensuring adequate intake helps reduce the risk of reduced bone density and fractures. (Hong & Kang, 2023).

They support overall health during Graves’ disease, but do not treat the underlying autoimmune condition or reduce relapse risk.

Evidence level: Supported by clinical guidelines for bone health in hyperthyroidism; limited evidence for direct effects on Graves’ disease activity.

Protein and calorie adequacy

Hyperthyroidism is associated with increased energy expenditure and a catabolic state, which can lead to loss of muscle mass and strength (Nørrelund et al., 1999).

This provides a strong physiological rationale for ensuring adequate protein and energy intake to support muscle maintenance and reduce the risk of unintended weight or muscle loss (Kalyani et al., 2014; Mechanick et al., 2024).

However, it is important to note that:

• there are no high-quality clinical trials in Graves’ disease showing that higher protein or calorie intake directly improves thyroid-specific outcomes or symptoms
• current guidance is largely based on general clinical nutrition principles and evidence from other catabolic conditions, rather than Graves-specific studies

Evidence level: Mechanistic rationale and indirect evidence (limited Graves-specific clinical data)

Iodine caution

Avoid very high iodine intake (e.g. high-dose supplements, kelp, and iodine-rich products), particularly in individuals with Graves’ disease.

Excess iodine has been associated in some human studies with:

• changes in thyroid autoimmunity (Pedersen et al., 2011)
• altered antibody patterns (including TRAb) (Pedersen et al., 2011)
• and shifts in Graves’ disease incidence at a population level (Teti et al., 2021)

There is also a biological rationale that high iodine exposure may:

• increase thyroid hormone production
• and potentially influence disease activity in susceptible individuals

However:

• the evidence is heterogeneous
• and iodine intake is considered a modifier of disease, not the primary driver

Evidence level: Clinically relevant with mechanistic and population-level support (limited direct causal evidence in Graves-specific trials)

Approaches with moderate evidence

Selenium and antioxidants

Includes selenium-rich foods (e.g. Brazil nuts, fish, eggs) and other antioxidant nutrients (e.g. vitamin C, vitamin E, beta-carotene, zinc).

Selenium has the strongest evidence among antioxidant nutrients in Graves’ disease, particularly in mild Graves’ orbitopathy, where it can improve symptoms, quality of life, and disease activity (Bartalena et al., 2021).

In Graves’ disease overall, selenium may help modulate oxidative stress and immune activity, but effects on thyroid outcomes and relapse are inconsistent and appear to depend on baseline selenium status.

Other antioxidants (e.g. vitamin C, vitamin E, beta-carotene, zinc) may support oxidative stress and inflammation, but evidence is limited and not consistent, and they are not established as standard treatment approaches.

Evidence level: Moderate for mild Graves’ orbitopathy; mixed/limited for Graves’ disease overall and other antioxidants.

Approaches with limited or inconsistent evidence

Anti-inflammatory diet

Emphasises whole foods (e.g. fruits, vegetables, whole grains, healthy fats) and reduction of ultra-processed foods and refined sugars.

There is a biological rationale that dietary patterns influencing inflammation and gut microbiota could interact with immune function.

However:

• there are no high-quality human clinical trials in Graves’ disease showing that an anti-inflammatory diet improves:
  • disease activity
  • thyroid function
  • or TRAb/TSI antibody levels (Kravchenko & Zakharchenko, 2023)
• current evidence is indirect, based on:
  • broader autoimmune disease research
  • mechanistic studies (inflammation, gut–immune pathways)
  • and observational data

As a result, anti-inflammatory diets may support general health, but are not established as a treatment strategy for Graves’ disease outcomes.

Evidence level: Mechanistic and indirect evidence; no direct Graves-specific clinical trial evidence

Gluten elimination

Removes wheat, barley, and rye.

A gluten-free diet is essential for individuals with coeliac disease and may improve overall health in those with confirmed gluten sensitivity.

In Graves’ disease without coeliac disease, current evidence does not show consistent benefits (Philippou & Nikiphorou, 2022). While some small studies report modest reductions in thyroid antibodies, findings are inconsistent and do not reliably translate into improvements in thyroid function, disease activity, or relapse risk.

Mechanistic theories (e.g. gut permeability and immune activation) have been proposed, but these have not been confirmed in well-powered human clinical trials.

As a result, gluten elimination is not recommended as a routine treatment strategy for Graves’ disease in the absence of coeliac disease or clear intolerance.

Evidence level: Limited and inconsistent human evidence; no strong Graves-specific clinical trial support

Dairy elimination

Removes cow’s milk and dairy foods.

Dairy elimination may be appropriate for individuals with lactose intolerance, milk allergy, or personal intolerance.

In Graves’ disease, there is no human clinical evidence that removing dairy improves disease activity, thyroid function, or thyroid antibody levels (e.g. TRAb) (Lane et al., 2020). Research in this area is limited and indirect, and does not support dairy elimination as a treatment strategy.

Importantly, dairy intake has not been shown to worsen Graves’ disease, and most evidence relating to thyroid health focuses on broader nutritional patterns or specific nutrients rather than dairy avoidance.

Evidence level: No direct Graves-specific clinical evidence

Low-glycaemic, whole-food diet

Emphasises whole grains, legumes, vegetables, fibre, and minimally processed foods.

There is currently no direct evidence that this dietary pattern improves Graves’ disease activity, thyroid function, or TRAb levels. It may support general metabolic health, but it is not an established treatment strategy for Graves’ disease.

Evidence level: Indirect and non-specific; no direct Graves-specific clinical trial evidence

Approaches with very limited evidence

Stress reduction

Includes yoga, meditation, breathwork, and similar practices.
May support symptom management and wellbeing.
Evidence level: Low-level evidence

Environmental and toxin reduction

Reducing exposure to chemicals, improving diet quality, and supporting oral health.
Evidence level: Very limited, case-based

Supplements including L-carnitine

May support energy metabolism and symptom management.
Should only be used under medical guidance.
Evidence level: Supportive, not curative

Key takeaways

• Diet and lifestyle should support but not replace medical treatment
• Diet alone cannot treat or reverse Graves’ disease
• Remission can occur with medical treatment (Malboosbaf & Azizi, 2020)
• Strongest evidence supports protein intake, bone health, and iodine management
• Other approaches may help symptoms but have limited evidence

Quick summary

• No diet treats Graves’ disease
• Strongest evidence: protein, calcium, vitamin D, iodine management
• Some diets may help symptoms, but evidence is limited
• Diet should support but not replace treatment

FAQs

References

Hong AR, Kang H (2023). Evaluation and Management of Bone Health in Patients with Thyroid Diseases: A Position Statement of the Korean Thyroid Association. Endocrinol Metab 38(2):175–189. https://doi.org/10.3803/enm.2023.1701

Wiersinga WM (2019). Graves’ Disease: Can It Be Cured? Endocrinology and Metabolism. https://doi.org/10.3803/enm.2019.34.1.29

Malboosbaf R & Azizi F (2020). Long-Term Treatment with Antithyroid Drugs: Efficacy and Safety. International Journal of Endocrinology and Metabolism. https://doi.org/10.5812/ijem.101487

Nørrelund H et al. (1999). Muscle mass and function in thyrotoxic patients before and during medical treatment. Clin Endocrinol 51(6):693–699. https://doi.org/10.1046/j.1365-2265.1999.00861.x

Kalyani RR et al. (2014). Age-related and disease-related muscle loss. Lancet Diabetes Endocrinol 2(10):819–829. https://doi.org/10.1016/S2213-8587(14)70034-8

Mechanick JI et al. (2024). Strategies for minimizing muscle loss during use of incretin-mimetic drugs. Obes Rev. https://doi.org/10.1111/obr.13841

Pedersen IB et al. (2011). A cautious iodization programme bringing iodine intake to a low recommended level is associated with an increase in the prevalence of thyroid autoantibodies in the population. Clin Endocrinol 75(1):120–126. https://doi.org/10.1111/j.1365-2265.2011.04008.x

Teti C et al. (2021). Iodoprophylaxis and thyroid autoimmunity: an update. Immunol Res 69(2):129–138. https://doi.org/10.1007/s12026-021-09192-6

Bartalena L et al. (2021). The 2021 European Group on Graves’ orbitopathy (EUGOGO) clinical practice guidelines for the medical management of Graves’ orbitopathy. Eur J Endocrinol 185(4):G43–G67. https://doi.org/10.1530/EJE-21-0479

Kravchenko V, Zakharchenko T (2023). Thyroid hormones and minerals in immunocorrection of disorders in autoimmune thyroid diseases. Front Endocrinol 14. https://doi.org/10.3389/fendo.2023.1225494

Philippou E, Nikiphorou E (2022). Gluten or no gluten for rheumatic diseases? Joint Bone Spine 89(6):105453. https://doi.org/10.1016/j.jbspin.2022.105453

Lane L et al. (2020). New therapeutic horizons for Graves’ hyperthyroidism. Endocr Rev 41(6):873–884. https://doi.org/10.1210/endrev/bnaa022

Rybka Z et al. (2024). The impact of nutritional and dietary factors on Hashimoto’s thyroiditis: A comprehensive review. Qual Sport 18:53755. https://doi.org/10.12775/qs.2024.18.53755