Comparisons

Dark red iron supplement tablets beside cooked lentils and a glass of orange juice

Iron Bisglycinate vs Ferrous Sulfate: Absorptio...

Why ferrous sulfate is the reference point Ferrous sulfate is the most commonly used ferrous iron salt, named in most clinical guidelines and the cheapest thing on the shelf. That's...

Iron Bisglycinate vs Ferrous Sulfate: Absorptio...

Why ferrous sulfate is the reference point Ferrous sulfate is the most commonly used ferrous iron salt, named in most clinical guidelines and the cheapest thing on the shelf. That's...

A pool of deep red krill oil beside pale yellow fish oil in two glass petri dishes

Fish Oil vs Krill Oil: Does the Form Change the...

What differs between the two oils Most of the EPA and DHA in fish oil sits on a glycerol backbone as triglycerides, although concentrates are sold as ethyl esters too....

Fish Oil vs Krill Oil: Does the Form Change the...

What differs between the two oils Most of the EPA and DHA in fish oil sits on a glycerol backbone as triglycerides, although concentrates are sold as ethyl esters too....

Golden algal oil in a small glass vial beside a strand of dried seaweed

Fish Oil vs Algal Oil

What the direct comparison found The trial that finally compared the two head to head was published in 2025 by Bailey and colleagues. Ninety-three adults aged 21 to 82 with...

Fish Oil vs Algal Oil

What the direct comparison found The trial that finally compared the two head to head was published in 2025 by Bailey and colleagues. Ninety-three adults aged 21 to 82 with...

Two heaped scoops of fine white powder on a dark countertop, one slightly crystalline

Creatine Monohydrate vs Hydrochloride

What each form actually is Creatine is a compound your liver and kidneys make, and your muscles store as phosphocreatine, where it donates a phosphate group to regenerate ATP during...

Creatine Monohydrate vs Hydrochloride

What each form actually is Creatine is a compound your liver and kidneys make, and your muscles store as phosphocreatine, where it donates a phosphate group to regenerate ATP during...

Two unlabelled white supplement bottles side by side with scattered capsules on a pale wood table

Magnesium Glycinate vs Threonate: What Each Was...

What each compound is Magnesium bisglycinate is magnesium ion bound to two molecules of glycine, the simplest amino acid. That bond makes a chelate, a neutral ring structure able to...

Magnesium Glycinate vs Threonate: What Each Was...

What each compound is Magnesium bisglycinate is magnesium ion bound to two molecules of glycine, the simplest amino acid. That bond makes a chelate, a neutral ring structure able to...

Two clear capsules of different sizes held above a white ceramic dish in morning sunlight

Vitamin D 1000 IU vs 5000 IU

The two reference points The Institute of Medicine published the current dietary reference intakes for vitamin D in 2010, and they haven't been revised. The Recommended Dietary Allowance is 600...

Vitamin D 1000 IU vs 5000 IU

The two reference points The Institute of Medicine published the current dietary reference intakes for vitamin D in 2010, and they haven't been revised. The Recommended Dietary Allowance is 600...

  • Magnesium

    The dose ranges that show up in trials, and the forms that were actually used in them.

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  • Ashwagandha

    Stress and sleep scores, the trial sizes behind them, and where industry funding sits.

    Read the file 
  • Creatine

    What the trials measured outside strength sports, including work in older adults.

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