Interaction Checker

Check interactions

Add your supplements, foods, meals — and any medications you take — to see how they interact. Findings are grouped by severity: what to avoid, what needs care or timing, and what actually works better together.

Thyroid Support Complex

Add more (1/12)

Add a medication you take (optional)

Caution

17 · Combine carefully — read the note

Caution

Vitamin ARetinoids

Vitamin A: Retinoids

Known interaction

Caution

Vitamin CMay affect some chemo drugs

Vitamin C: May affect some chemo drugs

Known interaction

Caution

Vitamin DGlucocorticoids (reduced vitamin D effectiveness)

Vitamin D: Glucocorticoids (reduced vitamin D effectiveness)

Known interaction

Caution

Vitamin DAnticonvulsants like phenytoin (increased vitamin D metabolism)

Vitamin D: Anticonvulsants like phenytoin (increased vitamin D metabolism)

Known interaction

Caution

Vitamin DOrlistat (reduced fat-soluble vitamin absorption)

Vitamin D: Orlistat (reduced fat-soluble vitamin absorption)

Known interaction

Caution

IodineThyroid medications

Iodine: Thyroid medications

Known interaction

Caution

ZincSeparate from antibiotics

Zinc: Separate from antibiotics

Known interaction

Caution

SeleniumMay affect thyroid medication needs

Selenium: May affect thyroid medication needs

Known interaction

Caution

L-TyrosineMAOIs contraindicated

L-Tyrosine: MAOIs contraindicated

Known interaction

Caution

L-TyrosineThyroid meds

L-Tyrosine: Thyroid meds

Known interaction

Caution

Coleus Forskohlii (Forskolin)Blood pressure meds (additive)

Coleus Forskohlii (Forskolin): Blood pressure meds (additive)

Known interaction

Caution

Coleus Forskohlii (Forskolin)Blood thinners

Coleus Forskohlii (Forskolin): Blood thinners

Known interaction

Caution

Coleus Forskohlii (Forskolin)Thyroid meds

Coleus Forskohlii (Forskolin): Thyroid meds

Known interaction

Caution

GuggulThyroid medications

Guggul: Thyroid medications

Known interaction

Caution

GuggulStatins

Guggul: Statins

Known interaction

Caution

GuggulBlood thinners

Guggul: Blood thinners

Known interaction

Caution

GuggulBirth control

Guggul: Birth control

Known interaction

Works well together

7 · Beneficial pairing

Works well together

Vitamin AZinc

Vitamin A pairs well with Zinc.

Stacking note

Works well together

Vitamin AVitamin D

Vitamin A pairs well with Vitamin D.

Stacking note

Works well together

IodineSelenium

Iodine pairs well with Selenium.

Stacking note

Works well together

IodineL-Tyrosine

Iodine pairs well with L-Tyrosine.

Stacking note

Works well together

ZincVitamin C

Zinc pairs well with Vitamin C.

Stacking note

Works well together

SeleniumZinc

Selenium pairs well with Zinc.

Stacking note

Works well together

L-TyrosineVitamin C

L-Tyrosine pairs well with Vitamin C.

Stacking note

Not medical advice. This tool surfaces well-established and known interactions from our reference data and curated rules. It is not exhaustive, can’t see your full health picture, and an absence of findings does not mean a combination is safe. Always consult a doctor or pharmacist about your supplements and medications.