Supporting Thyroid Health Naturally With Vitamins

Table of Contents

Several vitamins help keep your thyroid healthy, working both directly and indirectly. Together, these vitamins create a support system that helps the thyroid function properly, reducing symptoms associated with thyroid disorders and promoting overall health.

#1: The B Vitamins

• Vitamin B1: The thyroid helps regulate the conversion from food to fuel in the body, and if you have hyperthyroidism (overactive thyroid), your metabolism is running faster than normal. Having enough vitamin B1 (thiamine) in your system helps your cells keep up with the high-energy demands of your thyroid.
• Vitamin B2: Thyroid function can be suppressed when there is a lack of vitamin B2 (Riboflavin). Low B2 levels have been linked to a low level of thyroxine (T4), indicating less thyroid activity.
• Vitamin B3: Converted into the coenzymes NAD+ (nicotinamide adenine dinucleotide) and NADP+ (nicotinamide adenine dinucleotide phosphate), B3 helps cells in the endocrine glands by ensuring they have enough energy to function.
• Vitamin B6: Vitamin B6 supports neurological signaling, inflammation control, and cellular metabolism, helping regulate the thyroid hormone and how it is used throughout the body. 
• Vitamin B12: As an essential vitamin in the synthesis of thyroid hormones and the metabolism process, vitamin B12 is crucial to thyroid function. Consuming an adequate amount of eggs, dairy, meat, and fish can help you avoid a deficiency. Being low in vitamin B12 can contribute to autoimmune thyroid disease, such as Hashimoto’s thyroiditis.

#2: Vitamin A

Vitamin A has been shown to help regulate thyroid hormone metabolism and behavior, and the release of the thyroid-stimulating hormone (TSH). Vitamin A’s active form, retinoid, interacts with signaling pathways, influencing how thyroid hormones are used within the body. 

Possible symptoms that may occur as a result of an overabundance or lack of vitamin A include:

• Too little vitamin A:
• Dry skin and hair
• Dry eyes
• Poor vision
• Weakened immune system
• Too much vitamin A:
• Nausea
• Dry, peeling skin
• Hair loss
• Bone or joint pain
• Liver damage



By maintaining sufficient Vitamin A levels, those with thyroid disorders may experience reduced symptoms such as fatigue, weight fluctuations, and metabolic instability.

#3: Vitamin C

Vitamin C acts as an antioxidant, helping neutralize reactive oxygen species (ROS) and protect cells from oxidative stress. This is especially important for high-metabolism glands, such as the thyroid, which are more vulnerable to oxidative damage. Vitamin C supports immune function and energy metabolism, helping to reduce symptoms commonly associated with thyroid disorders.

#4: Vitamin D

Vitamin D deficiency is more common in people who have autoimmune and non-autoimmune thyroid disorders, such as: 

• Autoimmune:
• Hashimoto’s Thyroiditis
• Grave’s Diseases

• Non-autoimmune:
• Hyperthyroidism
• Hypothyroidism
• Thyroiditis



Vitamin D is involved in immune regulation and how the body reacts to threats. When vitamin D is lacking, the immune system may become overactive, which can intensify thyroid symptoms by increasing inflammation and autoimmune attacks on the thyroid. On the other hand, ​​individuals with thyroid conditions may experience improved symptoms, better immune balance, and enhanced overall thyroid health.

#5: Vitamin E

Vitamin E, a fat-soluble antioxidant, helps protect cells from oxidative stress by counteracting ROS. Vitamin E plays a vital role in preventing oxidative damage and supporting thyroid function, especially in high metabolic or autoimmune conditions. By strengthening the body’s antioxidant defenses, Vitamin E may also lessen symptoms associated with oxidative stress, including fatigue, brain fog, and tissue inflammation, improving overall well-being.



If you’re unsure of how to start a healthier lifestyle with the vitamins that your body needs, HealthierU is here to help. Dr. Donna Sergi has the experience and knowledge to help those with thyroid disorders by targeting their specific underlying symptoms. With a personalized plan, you can manage or eliminate your symptoms and get back to feeling your healthiest self.

#1: Determine Current Blood Levels

Through bloodwork, your doctor can interpret your results to determine how much of each vitamin you are lacking or have an excess of. By knowing your exact levels, you can avoid oversupplementation, determine the right dosage, and further understand your health.



By having this information, you and your healthcare provider or Nutrition Response Practitioner can make informed, personalized decisions to optimize nutrition, support your thyroid function, and improve overall well-being.

#2: Focus on Diet

Once you understand the vitamins you need to support your thyroid health, you can make sure you are getting the right amounts. Receiving vitamins through diet rather than supplements is the most natural and effective approach.

Nutrients from whole foods often have more bioavailability than supplements. Because the vitamins are obtained alongside co-factors, enzymes, and phytonutrients, the body can absorb and use them more efficiently. By focusing on nutrient-rich whole foods, you give your body the tools it needs to use those nutrients to the best of its ability.

The NHS Eatwell Guide states your daily diet should:

• Be made up of a little over one-third fruits and vegetables
• Consists of over one-third of starchy foods
• Include proteins such as meats, beans, eggs, pulses, fish, etc
• Should have some dairy or alternatives, such as yogurt
• Contain unsaturated oils and spreads in small amounts
• Include at least 6 to 8 glasses of fluid a day



Dr. Donna Sergi at Healthier U is dedicated and experienced in helping people become the healthiest version of themselves. By assessing your hyperthyroid or hypothyroidism symptoms, a tailored nutrition plan can be developed to help you manage or eliminate these symptoms, while supporting your body to function at its best.

Yes, balanced nutrition will help support your overall well-being and counteract some symptoms of thyroid disorders. 

Improved Gut Health

The gut is your body’s main source of nutrient absorption. A healthy gut allows the body to absorb key nutrients that directly support thyroid function. Gut health can be improved through adequate vitamin intake. Vitamins such as vitamin C, B2 (riboflavin), and vitamin D have been shown to influence the composition and activity of gut bacteria.



Thyroid hormones regulate how quickly food moves through your digestive system, so both an overactive and an underactive thyroid can alter gut motility. Supplying your body with the right nutrients may help support digestive function and ease some gut-related symptoms associated with thyroid disorders.

Common GI symptoms that occur in those with thyroid disorders:

• In hypothyroidism:
• Bloating
• Constipation
• Slow digestion
• Nutrient deficiency
• In hyperthyroidism:
• Frequent soft stool or diarrhea
• Abdominal cramping

Enhanced Immunity

Many thyroid disorders, like Hashimoto’s disease and Graves' disease, are caused by the immune system mistakenly attacking the thyroid tissue.

A balanced immune system may help slow down disease progression by limiting unnecessary attacks, reducing inflammation, and preserving thyroid tissue. 

Ways a balanced immune system supports thyroid function include:



• Hashimoto’s disease (autoimmune hypothyroidism):
• Reduces autoimmune antibodies
• Lowers inflammation in the gland
• Helps preserve tissue
• Grave’s disease (autoimmune hyperthyroidism):
• Reduces stimulating antibodies
• Helps slow down thyroid hormone release
• Decreases inflammation 

Mood Support

Thyroid disorders can disrupt hormone signaling and regulation of neurotransmitters, affecting mood and emotional imbalance. Consuming adequate nutrients can help your brain make and regulate “feel-good” hormones such as serotonin and dopamine. 

Nutrients like B vitamins, magnesium, omega-3 fatty acids, vitamin D, and amino acids from protein play essential roles in these processes. By ensuring sufficient nutrient intake, individuals with thyroid disorders can reduce mood-related symptoms and promote a greater sense of well-being and positivity.

Common mood-related symptoms seen in thyroid disorders may include:



• Hypothyroidism
• Fatigue
• Low motivation
• Depression
• Hyperthyroidism 
• Anxiety
• Irritability
• Restlessness
• Sleep disturbances

Understanding what vitamins are good for thyroid health is an important first step toward feeling your best. At HealthierU, we help you identify the nutrients that will benefit you most and create a personalized plan to incorporate them into your diet. Your plan includes targeted nutrition, whole-food supplementation, and lifestyle strategies designed to support your thyroid and allow your body to heal and function naturally.

Common symptoms that HealthierU can help reduce or manage include:

• Hyperthyroidism
• Constant thirst
• Heart palpitations 
• Heat sensitivity
• Menstrual cycle irregularities 
• Mood swings
• Swollen neck
• Thinning hair or skin

• Hypothyroidism
• Cold sensitivity
• Constipation
• Dry hair and skin
• Fatigue
• Feelings of depression
• Irregular menstrual cycles 
• Muscle cramps
• Slow thoughts or movements
• Sore or achy muscles 
• Weight gain



If you’re ready for help with managing your thyroid issues, contact us and start your journey to a healthier you.