Side-by-side comparisons for your decisions

Glycinate is best for sleep, anxiety, and muscle relaxation without GI effects. Citrate is best for constipation relief and general magnesium repletion. Both ha...

These target different magnesium needs. L-threonate (Magtein) uniquely crosses the blood-brain barrier and raises brain magnesium — best for cognitive concerns,...

Ubiquinol absorbs 2-3x better than ubiquinone, especially in adults over 50. For most younger adults at standard doses, ubiquinone is sufficient and cheaper. Ub...

Both raise NAD+ levels with similar effect sizes in human trials. NR has more published clinical trials and a clearer regulatory status. NMN was reclassified by...

Ashwagandha is best for chronic stress, anxiety, and sleep — calming and grounding. Rhodiola is best for mental fatigue, burnout, and energy under stress — ener...

Both have antidepressant evidence comparable to mild SSRIs. Saffron has fewer drug interactions and a cleaner safety profile. St. John's Wort has more research ...

These solve different stress problems on different timelines. L-theanine works in 30-60 minutes for acute calm without sedation — ideal for situational stress, ...

L-theanine wins for most people. The fundamental issue: oral GABA struggles to cross the blood-brain barrier — its effects are debated and likely peripheral (gu...

Alpha-GPC delivers more raw choline per dose — best for acute cognitive performance and physical performance (growth hormone effects). Citicoline provides cytid...

These work through completely different mechanisms on completely different timelines. Alpha-GPC delivers choline that becomes acetylcholine — acute effects on f...

Both have mixed-to-modest evidence in osteoarthritis. Glucosamine sulfate (specifically the sulfate form) has slightly better evidence than chondroitin for mode...

Standard curcumin has poor bioavailability — most of it never reaches the bloodstream. Meriva (curcumin phytosome) achieves 29x higher absorption than standard ...

These are genuinely different approaches to joint pain. Eggshell membrane delivers a complete matrix of joint compounds at 500 mg/day with rapid onset (7-10 day...

Citrulline raises arginine levels more effectively than oral arginine itself does — counterintuitive but consistent across trials. For pump, blood flow, ED, and...

Fish oil delivers both EPA and DHA at lower cost. Algal oil is typically DHA-dominant and vegan-friendly, with no fish farming concerns or ocean contamination. ...

Cyanocobalamin is cheaper, more stable, and works fine for the vast majority of people. Methylcobalamin is the active form, preferred for known MTHFR mutations,...

These aren't alternatives — they're complementary. Vitamin D enables calcium absorption; vitamin K2 directs that calcium to bones rather than arteries. Taking h...

These solve different sleep problems. Melatonin is for circadian timing — jet lag, shift work, delayed sleep phase. Magnesium is for nervous system arousal — ra...

Psyllium is the more powerful fiber with stronger cholesterol-lowering and stool-bulking effects, but causes gas and bloating in some people. Sunfiber (PHGG) is...

Whey is fast-digesting, ideal post-workout for rapid amino acid delivery and muscle protein synthesis. Casein is slow-digesting, ideal before bed or between mea...

These aren't competing — they target completely different goals. Whey is the gold standard for muscle protein synthesis (high leucine, complete amino acid profi...

These differ in collagen type, peptide size, and cost more than in core effectiveness. Bovine provides Type I + Type III (broader connective tissue support, gut...

At matched doses, head-to-head trials show no meaningful difference. Monohydrate has 500+ studies, near-perfect absorption, and costs 2-3x less. HCL has better ...

Both improve insulin sensitivity but through different mechanisms and best for different populations. Berberine has the strongest broad metabolic evidence — com...