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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.

Creatine HMB

Add more (1/12)

Caution

9 · Combine carefully — read the note
Caution
CalciumSeparate from thyroid meds

Calcium: Separate from thyroid meds

Known interaction
Caution
CalciumAntibiotics

Calcium: Antibiotics

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
CreatineNone significant

Creatine: None significant

Known interaction
Caution

HMB (Beta-Hydroxy Beta-Methylbutyrate): None significant

Known interaction
Caution
BioPerine (Black Pepper Extract)Increases absorption of MANY drugs - caution

BioPerine (Black Pepper Extract): Increases absorption of MANY drugs - caution

Known interaction
Caution
BioPerine (Black Pepper Extract)Can affect drug levels significantly

BioPerine (Black Pepper Extract): Can affect drug levels significantly

Known interaction

Monitor / Timing

2 · Usually fine — mind timing or watch for effects
Monitor / Timing
CalciumCertain antibiotics / thyroid / bone drugs

Calcium can bind these drugs and reduce their absorption.

Why: Cation chelation in the gut.

Separate calcium from these medications by 2–4 hours.

Curated
Monitor / Timing

Vitamin D: Calcium (synergistic for bone health)

Known interaction

Works well together

1 · Beneficial pairing

HMB (Beta-Hydroxy Beta-Methylbutyrate) pairs well with Creatine.

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.