Can you take them together?
Pick any two supplements and get a straight answer: fine together, space them out, or watch the combined dose — with timing advice and the NIH reference numbers behind it. Every verdict links back to the full guide for each supplement.
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Run a free VitaCheck →Browse by supplement
Each section lists every checked combination for that supplement.
🌙 Magnesium — 24 combinations
Magnesium + Vitamin D3Magnesium + ZincMagnesium + IronMagnesium + CalciumMagnesium + Vitamin CMagnesium + Vitamin B12Magnesium + Folate (B9)Magnesium + Vitamin K2Magnesium + Vitamin EMagnesium + B-ComplexMagnesium + MultivitaminMagnesium + Omega-3 (Fish Oil)Magnesium + AshwagandhaMagnesium + MelatoninMagnesium + L-TheanineMagnesium + Turmeric / CurcuminMagnesium + BerberineMagnesium + Ginkgo BilobaMagnesium + CreatineMagnesium + CollagenMagnesium + Whey ProteinMagnesium + ProbioticsMagnesium + CoQ10Magnesium + 5-HTP
☀️ Vitamin D3 — 24 combinations
Vitamin D3 + MagnesiumVitamin D3 + ZincVitamin D3 + IronVitamin D3 + CalciumVitamin D3 + Vitamin CVitamin D3 + Vitamin B12Vitamin D3 + Folate (B9)Vitamin D3 + Vitamin K2Vitamin D3 + Vitamin EVitamin D3 + B-ComplexVitamin D3 + MultivitaminVitamin D3 + Omega-3 (Fish Oil)Vitamin D3 + AshwagandhaVitamin D3 + MelatoninVitamin D3 + L-TheanineVitamin D3 + Turmeric / CurcuminVitamin D3 + BerberineVitamin D3 + Ginkgo BilobaVitamin D3 + CreatineVitamin D3 + CollagenVitamin D3 + Whey ProteinVitamin D3 + ProbioticsVitamin D3 + CoQ10Vitamin D3 + 5-HTP
🛡️ Zinc — 24 combinations
Zinc + MagnesiumZinc + Vitamin D3Zinc + IronZinc + CalciumZinc + Vitamin CZinc + Vitamin B12Zinc + Folate (B9)Zinc + Vitamin K2Zinc + Vitamin EZinc + B-ComplexZinc + MultivitaminZinc + Omega-3 (Fish Oil)Zinc + AshwagandhaZinc + MelatoninZinc + L-TheanineZinc + Turmeric / CurcuminZinc + BerberineZinc + Ginkgo BilobaZinc + CreatineZinc + CollagenZinc + Whey ProteinZinc + ProbioticsZinc + CoQ10Zinc + 5-HTP
🩸 Iron — 24 combinations
Iron + MagnesiumIron + Vitamin D3Iron + ZincIron + CalciumIron + Vitamin CIron + Vitamin B12Iron + Folate (B9)Iron + Vitamin K2Iron + Vitamin EIron + B-ComplexIron + MultivitaminIron + Omega-3 (Fish Oil)Iron + AshwagandhaIron + MelatoninIron + L-TheanineIron + Turmeric / CurcuminIron + BerberineIron + Ginkgo BilobaIron + CreatineIron + CollagenIron + Whey ProteinIron + ProbioticsIron + CoQ10Iron + 5-HTP
🦴 Calcium — 24 combinations
Calcium + MagnesiumCalcium + Vitamin D3Calcium + ZincCalcium + IronCalcium + Vitamin CCalcium + Vitamin B12Calcium + Folate (B9)Calcium + Vitamin K2Calcium + Vitamin ECalcium + B-ComplexCalcium + MultivitaminCalcium + Omega-3 (Fish Oil)Calcium + AshwagandhaCalcium + MelatoninCalcium + L-TheanineCalcium + Turmeric / CurcuminCalcium + BerberineCalcium + Ginkgo BilobaCalcium + CreatineCalcium + CollagenCalcium + Whey ProteinCalcium + ProbioticsCalcium + CoQ10Calcium + 5-HTP
🍊 Vitamin C — 24 combinations
Vitamin C + MagnesiumVitamin C + Vitamin D3Vitamin C + ZincVitamin C + IronVitamin C + CalciumVitamin C + Vitamin B12Vitamin C + Folate (B9)Vitamin C + Vitamin K2Vitamin C + Vitamin EVitamin C + B-ComplexVitamin C + MultivitaminVitamin C + Omega-3 (Fish Oil)Vitamin C + AshwagandhaVitamin C + MelatoninVitamin C + L-TheanineVitamin C + Turmeric / CurcuminVitamin C + BerberineVitamin C + Ginkgo BilobaVitamin C + CreatineVitamin C + CollagenVitamin C + Whey ProteinVitamin C + ProbioticsVitamin C + CoQ10Vitamin C + 5-HTP
⚡ Vitamin B12 — 24 combinations
Vitamin B12 + MagnesiumVitamin B12 + Vitamin D3Vitamin B12 + ZincVitamin B12 + IronVitamin B12 + CalciumVitamin B12 + Vitamin CVitamin B12 + Folate (B9)Vitamin B12 + Vitamin K2Vitamin B12 + Vitamin EVitamin B12 + B-ComplexVitamin B12 + MultivitaminVitamin B12 + Omega-3 (Fish Oil)Vitamin B12 + AshwagandhaVitamin B12 + MelatoninVitamin B12 + L-TheanineVitamin B12 + Turmeric / CurcuminVitamin B12 + BerberineVitamin B12 + Ginkgo BilobaVitamin B12 + CreatineVitamin B12 + CollagenVitamin B12 + Whey ProteinVitamin B12 + ProbioticsVitamin B12 + CoQ10Vitamin B12 + 5-HTP
🤰 Folate (B9) — 24 combinations
Folate (B9) + MagnesiumFolate (B9) + Vitamin D3Folate (B9) + ZincFolate (B9) + IronFolate (B9) + CalciumFolate (B9) + Vitamin CFolate (B9) + Vitamin B12Folate (B9) + Vitamin K2Folate (B9) + Vitamin EFolate (B9) + B-ComplexFolate (B9) + MultivitaminFolate (B9) + Omega-3 (Fish Oil)Folate (B9) + AshwagandhaFolate (B9) + MelatoninFolate (B9) + L-TheanineFolate (B9) + Turmeric / CurcuminFolate (B9) + BerberineFolate (B9) + Ginkgo BilobaFolate (B9) + CreatineFolate (B9) + CollagenFolate (B9) + Whey ProteinFolate (B9) + ProbioticsFolate (B9) + CoQ10Folate (B9) + 5-HTP
🧈 Vitamin K2 — 24 combinations
Vitamin K2 + MagnesiumVitamin K2 + Vitamin D3Vitamin K2 + ZincVitamin K2 + IronVitamin K2 + CalciumVitamin K2 + Vitamin CVitamin K2 + Vitamin B12Vitamin K2 + Folate (B9)Vitamin K2 + Vitamin EVitamin K2 + B-ComplexVitamin K2 + MultivitaminVitamin K2 + Omega-3 (Fish Oil)Vitamin K2 + AshwagandhaVitamin K2 + MelatoninVitamin K2 + L-TheanineVitamin K2 + Turmeric / CurcuminVitamin K2 + BerberineVitamin K2 + Ginkgo BilobaVitamin K2 + CreatineVitamin K2 + CollagenVitamin K2 + Whey ProteinVitamin K2 + ProbioticsVitamin K2 + CoQ10Vitamin K2 + 5-HTP
🥑 Vitamin E — 24 combinations
Vitamin E + MagnesiumVitamin E + Vitamin D3Vitamin E + ZincVitamin E + IronVitamin E + CalciumVitamin E + Vitamin CVitamin E + Vitamin B12Vitamin E + Folate (B9)Vitamin E + Vitamin K2Vitamin E + B-ComplexVitamin E + MultivitaminVitamin E + Omega-3 (Fish Oil)Vitamin E + AshwagandhaVitamin E + MelatoninVitamin E + L-TheanineVitamin E + Turmeric / CurcuminVitamin E + BerberineVitamin E + Ginkgo BilobaVitamin E + CreatineVitamin E + CollagenVitamin E + Whey ProteinVitamin E + ProbioticsVitamin E + CoQ10Vitamin E + 5-HTP
🅱️ B-Complex — 24 combinations
B-Complex + MagnesiumB-Complex + Vitamin D3B-Complex + ZincB-Complex + IronB-Complex + CalciumB-Complex + Vitamin CB-Complex + Vitamin B12B-Complex + Folate (B9)B-Complex + Vitamin K2B-Complex + Vitamin EB-Complex + MultivitaminB-Complex + Omega-3 (Fish Oil)B-Complex + AshwagandhaB-Complex + MelatoninB-Complex + L-TheanineB-Complex + Turmeric / CurcuminB-Complex + BerberineB-Complex + Ginkgo BilobaB-Complex + CreatineB-Complex + CollagenB-Complex + Whey ProteinB-Complex + ProbioticsB-Complex + CoQ10B-Complex + 5-HTP
💊 Multivitamin — 24 combinations
Multivitamin + MagnesiumMultivitamin + Vitamin D3Multivitamin + ZincMultivitamin + IronMultivitamin + CalciumMultivitamin + Vitamin CMultivitamin + Vitamin B12Multivitamin + Folate (B9)Multivitamin + Vitamin K2Multivitamin + Vitamin EMultivitamin + B-ComplexMultivitamin + Omega-3 (Fish Oil)Multivitamin + AshwagandhaMultivitamin + MelatoninMultivitamin + L-TheanineMultivitamin + Turmeric / CurcuminMultivitamin + BerberineMultivitamin + Ginkgo BilobaMultivitamin + CreatineMultivitamin + CollagenMultivitamin + Whey ProteinMultivitamin + ProbioticsMultivitamin + CoQ10Multivitamin + 5-HTP
🐟 Omega-3 (Fish Oil) — 24 combinations
Omega-3 (Fish Oil) + MagnesiumOmega-3 (Fish Oil) + Vitamin D3Omega-3 (Fish Oil) + ZincOmega-3 (Fish Oil) + IronOmega-3 (Fish Oil) + CalciumOmega-3 (Fish Oil) + Vitamin COmega-3 (Fish Oil) + Vitamin B12Omega-3 (Fish Oil) + Folate (B9)Omega-3 (Fish Oil) + Vitamin K2Omega-3 (Fish Oil) + Vitamin EOmega-3 (Fish Oil) + B-ComplexOmega-3 (Fish Oil) + MultivitaminOmega-3 (Fish Oil) + AshwagandhaOmega-3 (Fish Oil) + MelatoninOmega-3 (Fish Oil) + L-TheanineOmega-3 (Fish Oil) + Turmeric / CurcuminOmega-3 (Fish Oil) + BerberineOmega-3 (Fish Oil) + Ginkgo BilobaOmega-3 (Fish Oil) + CreatineOmega-3 (Fish Oil) + CollagenOmega-3 (Fish Oil) + Whey ProteinOmega-3 (Fish Oil) + ProbioticsOmega-3 (Fish Oil) + CoQ10Omega-3 (Fish Oil) + 5-HTP
🌿 Ashwagandha — 24 combinations
Ashwagandha + MagnesiumAshwagandha + Vitamin D3Ashwagandha + ZincAshwagandha + IronAshwagandha + CalciumAshwagandha + Vitamin CAshwagandha + Vitamin B12Ashwagandha + Folate (B9)Ashwagandha + Vitamin K2Ashwagandha + Vitamin EAshwagandha + B-ComplexAshwagandha + MultivitaminAshwagandha + Omega-3 (Fish Oil)Ashwagandha + MelatoninAshwagandha + L-TheanineAshwagandha + Turmeric / CurcuminAshwagandha + BerberineAshwagandha + Ginkgo BilobaAshwagandha + CreatineAshwagandha + CollagenAshwagandha + Whey ProteinAshwagandha + ProbioticsAshwagandha + CoQ10Ashwagandha + 5-HTP
😴 Melatonin — 24 combinations
Melatonin + MagnesiumMelatonin + Vitamin D3Melatonin + ZincMelatonin + IronMelatonin + CalciumMelatonin + Vitamin CMelatonin + Vitamin B12Melatonin + Folate (B9)Melatonin + Vitamin K2Melatonin + Vitamin EMelatonin + B-ComplexMelatonin + MultivitaminMelatonin + Omega-3 (Fish Oil)Melatonin + AshwagandhaMelatonin + L-TheanineMelatonin + Turmeric / CurcuminMelatonin + BerberineMelatonin + Ginkgo BilobaMelatonin + CreatineMelatonin + CollagenMelatonin + Whey ProteinMelatonin + ProbioticsMelatonin + CoQ10Melatonin + 5-HTP
🍵 L-Theanine — 24 combinations
L-Theanine + MagnesiumL-Theanine + Vitamin D3L-Theanine + ZincL-Theanine + IronL-Theanine + CalciumL-Theanine + Vitamin CL-Theanine + Vitamin B12L-Theanine + Folate (B9)L-Theanine + Vitamin K2L-Theanine + Vitamin EL-Theanine + B-ComplexL-Theanine + MultivitaminL-Theanine + Omega-3 (Fish Oil)L-Theanine + AshwagandhaL-Theanine + MelatoninL-Theanine + Turmeric / CurcuminL-Theanine + BerberineL-Theanine + Ginkgo BilobaL-Theanine + CreatineL-Theanine + CollagenL-Theanine + Whey ProteinL-Theanine + ProbioticsL-Theanine + CoQ10L-Theanine + 5-HTP
🟡 Turmeric / Curcumin — 24 combinations
Turmeric / Curcumin + MagnesiumTurmeric / Curcumin + Vitamin D3Turmeric / Curcumin + ZincTurmeric / Curcumin + IronTurmeric / Curcumin + CalciumTurmeric / Curcumin + Vitamin CTurmeric / Curcumin + Vitamin B12Turmeric / Curcumin + Folate (B9)Turmeric / Curcumin + Vitamin K2Turmeric / Curcumin + Vitamin ETurmeric / Curcumin + B-ComplexTurmeric / Curcumin + MultivitaminTurmeric / Curcumin + Omega-3 (Fish Oil)Turmeric / Curcumin + AshwagandhaTurmeric / Curcumin + MelatoninTurmeric / Curcumin + L-TheanineTurmeric / Curcumin + BerberineTurmeric / Curcumin + Ginkgo BilobaTurmeric / Curcumin + CreatineTurmeric / Curcumin + CollagenTurmeric / Curcumin + Whey ProteinTurmeric / Curcumin + ProbioticsTurmeric / Curcumin + CoQ10Turmeric / Curcumin + 5-HTP
🟨 Berberine — 24 combinations
Berberine + MagnesiumBerberine + Vitamin D3Berberine + ZincBerberine + IronBerberine + CalciumBerberine + Vitamin CBerberine + Vitamin B12Berberine + Folate (B9)Berberine + Vitamin K2Berberine + Vitamin EBerberine + B-ComplexBerberine + MultivitaminBerberine + Omega-3 (Fish Oil)Berberine + AshwagandhaBerberine + MelatoninBerberine + L-TheanineBerberine + Turmeric / CurcuminBerberine + Ginkgo BilobaBerberine + CreatineBerberine + CollagenBerberine + Whey ProteinBerberine + ProbioticsBerberine + CoQ10Berberine + 5-HTP
🍃 Ginkgo Biloba — 24 combinations
Ginkgo Biloba + MagnesiumGinkgo Biloba + Vitamin D3Ginkgo Biloba + ZincGinkgo Biloba + IronGinkgo Biloba + CalciumGinkgo Biloba + Vitamin CGinkgo Biloba + Vitamin B12Ginkgo Biloba + Folate (B9)Ginkgo Biloba + Vitamin K2Ginkgo Biloba + Vitamin EGinkgo Biloba + B-ComplexGinkgo Biloba + MultivitaminGinkgo Biloba + Omega-3 (Fish Oil)Ginkgo Biloba + AshwagandhaGinkgo Biloba + MelatoninGinkgo Biloba + L-TheanineGinkgo Biloba + Turmeric / CurcuminGinkgo Biloba + BerberineGinkgo Biloba + CreatineGinkgo Biloba + CollagenGinkgo Biloba + Whey ProteinGinkgo Biloba + ProbioticsGinkgo Biloba + CoQ10Ginkgo Biloba + 5-HTP
💪 Creatine — 24 combinations
Creatine + MagnesiumCreatine + Vitamin D3Creatine + ZincCreatine + IronCreatine + CalciumCreatine + Vitamin CCreatine + Vitamin B12Creatine + Folate (B9)Creatine + Vitamin K2Creatine + Vitamin ECreatine + B-ComplexCreatine + MultivitaminCreatine + Omega-3 (Fish Oil)Creatine + AshwagandhaCreatine + MelatoninCreatine + L-TheanineCreatine + Turmeric / CurcuminCreatine + BerberineCreatine + Ginkgo BilobaCreatine + CollagenCreatine + Whey ProteinCreatine + ProbioticsCreatine + CoQ10Creatine + 5-HTP
✨ Collagen — 24 combinations
Collagen + MagnesiumCollagen + Vitamin D3Collagen + ZincCollagen + IronCollagen + CalciumCollagen + Vitamin CCollagen + Vitamin B12Collagen + Folate (B9)Collagen + Vitamin K2Collagen + Vitamin ECollagen + B-ComplexCollagen + MultivitaminCollagen + Omega-3 (Fish Oil)Collagen + AshwagandhaCollagen + MelatoninCollagen + L-TheanineCollagen + Turmeric / CurcuminCollagen + BerberineCollagen + Ginkgo BilobaCollagen + CreatineCollagen + Whey ProteinCollagen + ProbioticsCollagen + CoQ10Collagen + 5-HTP
🥛 Whey Protein — 24 combinations
Whey Protein + MagnesiumWhey Protein + Vitamin D3Whey Protein + ZincWhey Protein + IronWhey Protein + CalciumWhey Protein + Vitamin CWhey Protein + Vitamin B12Whey Protein + Folate (B9)Whey Protein + Vitamin K2Whey Protein + Vitamin EWhey Protein + B-ComplexWhey Protein + MultivitaminWhey Protein + Omega-3 (Fish Oil)Whey Protein + AshwagandhaWhey Protein + MelatoninWhey Protein + L-TheanineWhey Protein + Turmeric / CurcuminWhey Protein + BerberineWhey Protein + Ginkgo BilobaWhey Protein + CreatineWhey Protein + CollagenWhey Protein + ProbioticsWhey Protein + CoQ10Whey Protein + 5-HTP
🦠 Probiotics — 24 combinations
Probiotics + MagnesiumProbiotics + Vitamin D3Probiotics + ZincProbiotics + IronProbiotics + CalciumProbiotics + Vitamin CProbiotics + Vitamin B12Probiotics + Folate (B9)Probiotics + Vitamin K2Probiotics + Vitamin EProbiotics + B-ComplexProbiotics + MultivitaminProbiotics + Omega-3 (Fish Oil)Probiotics + AshwagandhaProbiotics + MelatoninProbiotics + L-TheanineProbiotics + Turmeric / CurcuminProbiotics + BerberineProbiotics + Ginkgo BilobaProbiotics + CreatineProbiotics + CollagenProbiotics + Whey ProteinProbiotics + CoQ10Probiotics + 5-HTP
🔆 CoQ10 — 24 combinations
CoQ10 + MagnesiumCoQ10 + Vitamin D3CoQ10 + ZincCoQ10 + IronCoQ10 + CalciumCoQ10 + Vitamin CCoQ10 + Vitamin B12CoQ10 + Folate (B9)CoQ10 + Vitamin K2CoQ10 + Vitamin ECoQ10 + B-ComplexCoQ10 + MultivitaminCoQ10 + Omega-3 (Fish Oil)CoQ10 + AshwagandhaCoQ10 + MelatoninCoQ10 + L-TheanineCoQ10 + Turmeric / CurcuminCoQ10 + BerberineCoQ10 + Ginkgo BilobaCoQ10 + CreatineCoQ10 + CollagenCoQ10 + Whey ProteinCoQ10 + ProbioticsCoQ10 + 5-HTP
🙂 5-HTP — 24 combinations
5-HTP + Magnesium5-HTP + Vitamin D35-HTP + Zinc5-HTP + Iron5-HTP + Calcium5-HTP + Vitamin C5-HTP + Vitamin B125-HTP + Folate (B9)5-HTP + Vitamin K25-HTP + Vitamin E5-HTP + B-Complex5-HTP + Multivitamin5-HTP + Omega-3 (Fish Oil)5-HTP + Ashwagandha5-HTP + Melatonin5-HTP + L-Theanine5-HTP + Turmeric / Curcumin5-HTP + Berberine5-HTP + Ginkgo Biloba5-HTP + Creatine5-HTP + Collagen5-HTP + Whey Protein5-HTP + Probiotics5-HTP + CoQ10