How to Find the Best Meal Replacement Shakes for Hypothyroidism

📌 Overview and Key Takeaways

This is a Dietitian’s guide on how to find the best meal replacement shakes for hypothyroidism.

Discover how to safely supplement your diet while managing thyroid issues.

Last Updated
Feb 7, 2026

Author and Medical Reviewer

Written by Kayla Kamen, MS, RD

Kayla Kamen is a Registered Dietitian with a MS in Nutrition.

Medically reviewed by Jennifer Fossett, PA-C

Jennifer Fossett is a Physician Assistant with a BA in Nutritional Sciences.

Meal Replacement Shakes for Hypothyroidism

Are Meal Replacement Shakes Good for Hypothyroidism?

Hypothyroidism occurs when the thyroid, a small gland in your neck, does not produce enough thyroid hormone,

It can be caused by autoimmune disease, thyroid surgery, radiation therapy, thyroiditis (inflammation of the thyroid), and certain medications.

How Many Calories Do People with Hypothyroidism Need?

Hypothyroidism can slow down your metabolism, which can lead to weight gain or difficulty losing weight.

Individuals with hypothyroidism therefore might need fewer calories than someone without the condition to achieve and maintain a healthy body weight.

How Much Protein Do People with Hypothyroidism Need?

Individuals with hypothyroidism, especially those struggling with weight management, might benefit from a high protein diet.

For example, increasing the percentage of your calories that come from protein can help you achieve and maintain a healthy body weight because:

• Protein is the most satiating macronutrient, meaning it can curb cravings and overeating (Am J Clin Nutr, 2008).
• Eating protein increases thermogenesis, or your energy expenditure (J Am Coll Nutr, 2004).
• Eating protein, if you lift weights, helps you build muscle, and individuals with more muscle have faster metabolisms (Nutrients, 2019).

It is important to note, however, that there is no one-size-fits-all answer to this question, so it is best to work with a healthcare professional to determine your individual calorie and protein needs.

What Is the Best Meal Replacement for Hypothyroidism?

Individuals with hypothyroidism might want to consider avoiding dairy and soy-based ingredients, as both have been shown to disrupt hormone levels in some individuals.

That said, the type of protein powder you use does not really matter.

Ingredients do matter, however, and could contribute to thyroid issues like hypothyroidism due to bidirectional relationship between your thyroid and your gut microbiome.

Among the most problematic ingredients are food additives and protein concentrates and isolates.

🚫 Avoid Food Additives

Regularly consuming food additives like emulsifiers, thickeners, and artificial sweeteners can alter the composition of your gut microbiome (North Clin Istanb, 2020).

Over time, this can lead to gut dysbiosis, which has been mechanistically linked to altered hormone levels and endocrine disorders (Int J Mol Sci, 2024).

Dysbiosis can lead to increased intestinal permeability (“leaky gut”), altered immune responses, and changes in the production of metabolites such as short-chain fatty acids (SCFAs), all of which may influence thyroid function.

⚠️ Here is a list of the most common food additives in meal replacements:

• acacia fiber
• acacia gum
• acesulfame potassium
• artificial flavors
• ascorbic acid
• aspartame
• calcium carbonate
• carrageenan
• cellulose gum
• dextrin
• dicalcium phosphate
• dipotassium phosphate
• erythritol
• gellan gum
• guar gum
• gum arabic
• inulin
• locust bean gum
• maltitol
• maltodextrin
• mono- and diglycerides
• ‘natural’ flavors
• rice bran extract
• rice dextrin
• rice hulls
• rosemary extract
• silica
• silicon dioxide
• sodium alginate
• soluble corn fiber
• sorbitol
• soy lecithin
• sucralose
• sunflower lecithin
• tocopherols
• tricalcium phosphate
• xanthan gum
• xylitol
• zinc oxide

As a rule of thumb, if you could not find an ingredient in nature or make it at home, it is a food additive.

🚫 Avoid Protein Concentrates and Isolates

You should also consider avoiding protein concentrates and isolates.

Most meal replacements are made from one or both of these protein sources, which have been mechanically and/or chemically stripped of everything but the protein.

This includes the enzymes, fiber, and other natural digestive aids that help you break them down.

You therefore do not digest them in the same way that you do whole foods, which can affect your gut health.

In fact, studies show that regularly eating protein concentrates and isolates can disrupt your gut microbiome and cause the formation of toxic byproducts in your gut (Nutrients, 2018; Mol Nutr Food Res, 2024).

So instead of ultra-processed protein concentrates or isolates, look for whole food protein sources like egg whites and almonds.

They are easier to digest and absorb.

Order Samples to see for yourself.

Editorial Guidelines

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This article was written by a Registered Dietitian and reviewed by a Physician Assistant. We rely on peer-reviewed research and trusted medical sources, and regularly update our content to ensure accuracy and clarity.

Sources

1. The American Journal of Clinical Nutrition (Am J Clin Nutr). Protein, weight management, and satiety. 2008.
2. Journal of the American College of Nutrition (J Am Coll Nutr). The effects of high protein diets on thermogenesis, satiety and weight loss: a critical review. 2004.
3. Nutrients (Nutrients). Dietary Protein and Muscle Mass: Translating Science to Application and Health Benefit. 2019.
4. Northern Clinics of Istanbul (North Clin Istanb). Food additives and microbiota. 2020.
5. International Journal of Molecular Sciences (Int J Mol Sci). Unveiling the Role of Gut Microbiota and Metabolites in Autoimmune Thyroid Diseases: Emerging Perspectives. 2024.
6. Nutrients (Nutrients). Effect of a Protein Supplement on the Gut Microbiota of Endurance Athletes: A Randomized, Controlled, Double-Blind Pilot Study. 2018.
7. Molecular Nutrition & Food Research (Mol Nutr Food Res). In Vitro Fermentation of Animal and Plant Protein Isolates by the Human Gut Microbiota Under High and Low Carbohydrate Conditions. 2024.