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Dietary supplement
Helps maintain normal thyroid function – day and night support
DAY – 8 active ingredients: L-tyrosine, Quercefit®, BOSWELLIN®, bladderwrack standardized for iodine, magnesium bisglycinate, vitamins B2, B9, B12
NIGHT – 12 active ingredients: myo-inositol, lemon balm, tocopherols and tocotrienols, Rhodiola rosea, selenium, vitamins B1, B3, B5, B6, manganese, copper, zinc
We recommend using the complete Thyro Spectrum® Day and Night Bundle
Tested microbiologically, for heavy metals, ethylene oxide, pesticides, and alkaloids
Quantity DAY: 60 capsules / 30 daily servings
Quantity NIGHT: 30 capsules / daily servings
Best before: 01.2028
Notified to GIS (Poland): BZ/SD/POW/PL1000D/004831/2026, BZ/SD/POW/PL1000D/004832/2026
Encapsulated and manufactured in Poland
148 in stock
Price per piece: 1,67 zł
Safe shopping guarantee. You will receive your product or your money back. See details
Free delivery within Poland from 250 zł
Previous lowest price was 149,99 zł.
Helps maintain normal thyroid function – day and night support.
Dietary supplement
Helps maintain normal thyroid function – day and night support
DAY – 8 active ingredients: L-tyrosine, Quercefit®, BOSWELLIN®, bladderwrack standardized for iodine, magnesium bisglycinate, vitamins B2, B9, B12
NIGHT – 12 active ingredients: myo-inositol, lemon balm, tocopherols and tocotrienols, Rhodiola rosea, selenium, vitamins B1, B3, B5, B6, manganese, copper, zinc
We recommend using the complete Thyro Spectrum® Day and Night Bundle
Tested microbiologically, for heavy metals, ethylene oxide, pesticides, and alkaloids
Quantity DAY: 60 capsules / 30 daily servings
Quantity NIGHT: 30 capsules / daily servings
Best before: 01.2028
Notified to GIS (Poland): BZ/SD/POW/PL1000D/004831/2026, BZ/SD/POW/PL1000D/004832/2026
Encapsulated and manufactured in Poland
148 in stock
Previous lowest price was 149,99 zł.
Price per piece: 1,67 zł
Free delivery within Poland from 250 zł
Safe shopping guarantee. You will receive your product or your money back. See details
A bundle of two supplements supporting thyroid function: Thyro Spectrum® NIGHT and Thyro Spectrum® DAY.
Thyro Spectrum® DAY contains:
L-Tyrosine:
Quercetin Quercefit® (Sophora japonica L.):
Indian Frankincense gum resin extract (Boswellia serrata) BOSWELLIN®:
Bladderwrack extract (Fucus vesiculosus) standardized to 0.1% iodine:
Magnesium bisglycinate:
Vitamin B2 as riboflavin 5′-phosphate:
Vitamin B9 active folic acid:
Vitamin B12 hydroxycobalamin:
Thyro Spectrum® NIGHT contains:
Myo-inositol:
Lemon balm (Melissa officinalis):
Arctic root (Rhodiola rosea):
Selenium in the form of L-selenomethionine Selenium SeLECT®:
Zinc in the form of gluconate:
Zinc is a cofactor for enzymes involved in the metabolism of proteins, carbohydrates, fats, and nucleic acids: alcohol dehydrogenase, superoxide dismutase, DNA polymerase, RNA polymerase, alkaline phosphatase, and carboxypeptidase. It is involved in the activity of over 200 enzymes.
Manganese in the form of gluconate:
Copper in the form of gluconate:
Vitamin B1 thiamine:
Vitamin B3 niacin:
Vitamin B5 pantothenic acid:
Vitamin B6 pyridoxine:
Thyro Spectrum® DAY
| Ingredient | Amount per daily serving 2 capsules |
|
| L-Tyrosine | 250 mg | – |
| Japanese Pagoda Tree flower extract (Sophora japonica L.) Quercefit®, standardized to 40% quercetin: 125 mg | 125 mg | – |
| – including quercetin | 50 mg | – |
| Indian Frankincense gum resin extract (Boswellia serrata) BOSWELLIN®, standardized to 70% boswellic acid and 2% AKBA | 50 mg | – |
| – including boswellic acid | 35 mg | – |
| Bladderwrack extract (Fucus vesiculosus), standardized to 0.1% iodine | 25 mg | – |
| – including iodine | 25 mcg | 16% DV* |
| Vitamin B2 (riboflavin 5′-phosphate, sodium salt) | 2,5 mg | 16% DV* |
| Vitamin B9 ((6S)-5-methyltetrahydrofolic acid, glucosamine salt) Quatrefolic® | 200 mcg | 100% DV* |
| Vitamin B12 (hydroxycobalamin) | 50 mcg | 2000% DV* |
| Acacia fiber | 36 mg | – |
| L-Leucine | 5 mg | – |
*DV – Daily Value
Ingredients: Magnesium bisglycinate, L-tyrosine, hydroxypropyl methylcellulose – plant-based capsule shell, Japanese Pagoda Tree flower extract Quercefit®, Indian Frankincense gum resin extract BOSWELLIN®, acacia fiber, bladderwrack extract, hydroxycobalamin, L-leucine, riboflavin 5′-phosphate sodium, (6S)-5-methyltetrahydrofolic acid glucosamine salt Quatrefolic®.
Gluten-free.
Amount per container: 60 capsules.
Thyro Spectrum® NIGHT
| Ingredient | Amount per daily serving 2 capsules |
|
| Myo-inositol | 200 mg | – |
| Lemon balm extract (Melissa officinalis L.) | 100 mg | – |
| Vitamin E (mixture of tocotrienols and tocopherols) DAVOSLIFE® | 16,5 mg | – |
| Arctic root extract (Rhodiola rosea L.) | 50 mg | – |
| Selenium (L-selenomethionine) Selenium SeLECT® | 100 mcg | – |
| Zinc (zinc gluconate) | 15 mg | 150% DV* |
| Manganese (manganese gluconate) | 250 mcg | 12,5% DV* |
| Copper (copper(II) gluconate) | 250 mcg | 25% DV* |
| Vitamin B1 (thiamine pyrophosphate chloride) | 5 mg | 454,5% DV* |
| Vitamin B3 (nicotinamide) | 10 mg | 62,5% DV* |
| Vitamin B5 (D-pantothenate, calcium) | 5 mg | – |
| Vitamin B6 (pyridoxine hydrochloride) | 2,5 mg | 12,5% DV* |
| Acacia fiber | 33,8 mg | – |
| L-Leucine | 5 mg | – |
*DV – Daily Value
Ingredients: myo-inositol, hydroxypropyl methylcellulose – plant-based capsule shell, zinc gluconate, lemon balm leaf extract, DAVOSLIFE mixture of tocotrienols and tocopherols, arctic root extract, acacia fiber, L-selenomethionine Selenium SeLECT®, niacin, thiamine pyrophosphate chloride, D-pantothenate calcium, L-leucine, pyridoxine hydrochloride, manganese gluconate, copper (II) gluconate.
Gluten-free.
Amount per container: 30 vegan capsules.
Recommended Daily Dosage
Thyro Spectrum® DAY: 2 capsules.
Thyro Spectrum® NIGHT: 1 capsule.
Suggested Use
Thyro Spectrum® DAY should be consumed on an empty stomach or 30–60 minutes before a meal (amino acids compete with each other for transport across the blood-brain barrier). Taking tyrosine without other amino acids (especially from protein) increases its effective absorption and delivery to the brain.
Thyro Spectrum® NIGHT should be consumed in the evening, during or after a meal.
Capsule Size
Thyro Spectrum® DAY: Capsule size “0”, length 21 mm. Vitamin B2 may discolor the capsule entirely or partially, giving it an intense orange color. If emptied from the capsule, the powder has a very intense, bitter taste.
Thyro Spectrum® NIGHT: Capsule size “00”, length 22 mm. If emptied from the capsule, the powder has a very intense, bitter taste.
Do not exceed suggested use. Dietary supplements should not replace a varied diet. The product is recommended for adults.
Warning: if pregnant or nursing, consult your doctor before use.
Keep away from the sun at a temperature below 25°C in the original packaging, out of reach of small children. Store the product in a dry place.
Production lot number / Best before – see the unit label (left side of the label).
Batch tests performed towards:
Testing was performed at the independent, accredited GBA Polska Laboratory – Accreditation Certificate No. AB 1095, and at the National Institute of Horticultural Research – Accreditation Certificate No. AB 757.

The thyroid plays a central role in the regulation of the body’s energy metabolism, as thyroid hormones—thyroxine ($T4$) and triiodothyronine ($T3$)—influence the basal metabolic rate, cellular oxygen consumption, and the production of ATP in the mitochondria. These processes are particularly intensive during the day, when the body’s demand for energy and metabolic efficiency is at its highest.
During the day, thyroid hormones affect the functioning of the nervous system, supporting concentration, alertness, and the ability to adapt to stress. They also regulate thermogenesis and the management of energy substrates, enabling the efficient utilization of glucose and fatty acids. Therefore, proper thyroid activity is crucial for maintaining physical and cognitive performance during daily activities.
Chronic stress and persistent activation of the nervous system during the night can disrupt the physiological regulation of neuroendocrine axes, including the HPT (hypothalamic-pituitary-thyroid) axis. Excessive stress activity is associated with circadian rhythm disruptions and changes in the secretion of regulatory hormones.
Ingredients such as lemon balm extract and magnesium (magnesium bisglycinate) support the calming of the nervous system and neurohormonal balance, which indirectly promotes proper conditions for the night-time regulation of thyroid function. While this effect is indirect, it is well-documented within the context of the physiology of stress and sleep.
Thyroid-supporting ingredients act through multiple pathways, covering both the synthesis of thyroid hormones and their actions at the cellular level. L-tyrosine and iodine provide the essential substrates for the production of T4 (thyroxine) and T3 (triiodothyronine), while magnesium and B-group vitamins support enzymatic reactions related to energy metabolism.
Active forms of folates and vitamin B12 participate in methylation processes and DNA synthesis, which are necessary for proper cell regeneration. Meanwhile, compounds with anti-inflammatory and antioxidant properties, such as quercetin and boswellic acids, help protect thyroid tissues from oxidative stress and excessive inflammatory activation, supporting their structural integrity.
Rhodiola rosea L. (Arctic root) is highly susceptible to fungi and molds, particularly Botrytis and root rot. Furthermore, Rhodiola has a long growing cycle—the root only reaches its full raw material value after 3–5 years. This means it is exposed to agrotechnical treatments, including chemical protection, for several years.
Rhodiola is a root plant, and it is specifically the roots and rhizomes that are used as raw material. Roots have a tendency to accumulate pesticides and heavy metals from the soil much more than the above-ground parts of the plant.
At LABS212®, we are very selective when choosing raw materials, which are tested both as individual ingredients and as a finished product. Thyro Spectrum® NIGHT shows full purity in terms of pesticides, containing no exceedances and not even any residues. Link to the test in tab “tests”.
The night serves as a critical period for regenerative processes and hormonal regulation, including thyroid function. During sleep, repair mechanisms intensify, nervous system activity normalizes, and biological rhythms synchronize, which is vital for maintaining metabolic balance.
Proper thyroid function during the night supports the stabilization of the hypothalamic-pituitary-thyroid (HPT) axis and promotes optimal hormone secretion regulation. Disruptions in these processes can lead to decreased sleep quality, difficulty falling asleep, shallow sleep, or night-time nervous system arousal, all of which negatively impact the body’s recovery.
During sleep, the body enters a state of reduced energy demand, focusing instead on replenishing energy stores and cellular regeneration. Thyroid hormones play an essential role in coordinating these processes by influencing the rate of metabolic turnover, mitochondrial function, and neurohormonal balance.
Targeted support for thyroid function during night-time hours promotes nervous system calming, stabilization of hormonal processes, and improved regeneration efficiency. Regular, high-quality sleep combined with supporting nocturnal metabolic mechanisms helps maintain hormonal homeostasis, leading to better well-being, a healthy circadian rhythm, and optimal thyroid performance throughout the day.
High doses of iodine are generally considered contraindicated and potentially harmful in Hashimoto’s disease. In individuals with autoimmune thyroiditis, iodine intake exceeding physiological requirements may contribute to adverse effects and exacerbate thyroid dysfunction.
The iodine included in Thyro Spectrum® is present at a moderate level – 16% of the recommended daily intake for a healthy adult. This means that a substantially higher intake would be required to reach the full daily requirement. However, in the context of Hashimoto’s disease, it is generally advised not to exceed 100% of the daily iodine requirement, making controlled, physiologically aligned intake particularly important.