Supplement Combinations
19 evidence-based pairings: which supplements to stack for synergy, which boost each other’s absorption, and which to keep apart.
Caffeine + L-Theanine
The classic nootropic stack: L-theanine smooths caffeine's jitters while preserving the focus boost.
Calcium + Vitamin D3
Vitamin D3 is required to absorb dietary and supplemental calcium.
Copper + Zinc
Long-term high-dose zinc depletes copper; supplement copper (≈1 mg per 10–15 mg zinc) if using chronically.
Curcumin + Piperine
Piperine from black pepper can increase curcumin bioavailability dramatically (studies report up to ~20x).
Iron + Vitamin C
Taken together, vitamin C can multiply the absorption of plant-based iron.
Magnesium + Vitamin D3
Magnesium is required to convert vitamin D into its active form, so low magnesium blunts D3's benefits.
Vitamin D3 + Vitamin K2
K2 directs the calcium that D3 helps absorb into bone rather than soft tissue and arteries.
Ashwagandha + L-Theanine
Both promote calm; frequently stacked for stress management.
Ashwagandha + Magnesium
Commonly combined for stress relief and better sleep quality.
Calcium + Iron
Calcium taken at the same time inhibits iron absorption; separate them by at least two hours.
Calcium + Vitamin K2
K2 activates the proteins that bind dietary calcium into the bone matrix.
Curcumin + Omega-3 (Fish Oil)
Complementary anti-inflammatory pathways often combined for joint comfort.
L-Theanine + Magnesium
Both calm the nervous system, a popular combination for relaxation and sleep.
Omega-3 (Fish Oil) + Vitamin D3
Both are fat-soluble and support mood and immunity; taking D3 with fish oil aids absorption.
Vitamin C + Zinc
Frequently combined for immune support during cold season.
Caffeine + Creatine
Some early data hinted caffeine might blunt creatine's effects; evidence is mixed and any effect is likely minor.
Calcium + Magnesium
Compete for absorption at very high single doses; keep intake balanced rather than mega-dosing one.
Omega-3 (Fish Oil) + Probiotics
Both support a healthy gut-inflammation balance.
Probiotics + Zinc
Zinc helps maintain the integrity of the gut lining.