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Spectra 303-T

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Spectra 303-T

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  • Description
  • Cautions
  • Supplement Facts
  • Servings


Spectra 303-T contains glandular ingredients, plus iodine and tyrosine, to support thyroid function.

Glandular ingredients, plus iodine and acetyl-l-tyrosine, to support thyroid function.

Spectra 303-T provides a high quality, thyroxine-free glandular extract with L-tyrosine, iodine, and other nutrients to support healthy thyroid function.* Research shows that L-tyrosine and iodine are critical for the production of the thyroid hormones, thyroxine (T4) and triiodothyronine (T3).

- Contains a freeze-dried thyroid glandular
- Supports metabolism and immune health
- Helps maintain healthy energy levels


Keep this and all medicines out of reach of children.

If pregnant or nursing, consult your healthcare practitioner before use.

Supplement Facts

Iodine (from potassium iodide) 225 mcg
Zinc (from zinc gluconate) 10 mg
Copper (as copper gluconate) 500 mcg
L-Tyrosine 100 mg :
Thyroid (thyroxine-free) 100 mg:
Other Ingredients: cellulose, dicalcium phosphate, modified cellulose gum, stearic acid, magnesium stearate, silicon dioxide, modified cellulose, glycerin, and carnauba wax.


Take 1 tablet one to three times daily, or as recommended by your healthcare practitioner.


Servings Per Container: 60