Three magnesium glycinate brands compared on cost per 100 mg of elemental magnesium and on whose testing claims can actually be verified. Solaray, Pure Encapsulations and Qunol.
Revolution Nutrition High Whey works out to 4.93 cents per gram of protein, the cheapest I have measured in Canada. But the product page publishes no ingredient list, and 62% of variants were out of stock. Scored 7.0 out of 10.
Pure Encapsulations Magnesium Glycinate assessed on the evidence: 120 mg per capsule, only two other ingredients, and the most expensive magnesium per 100 mg I have priced. Scored 8.0 out of 10.
Solaray Magnesium Glycinate 350 mg, assessed on verified evidence: anonymous-purchase ISO 17025 testing, bisglycinate form, four capsules per serving, and what it actually costs per 100 mg.
An independent look at Dr. Berg: his published credentials, what the Electrolyte Powder panel actually contains, and why 40 mg of sodium is a problem for the audience it is sold to.
An independent look at LEANFIT whey protein: the real protein concentration, the stevia-only label, and why the 2 kg bag costs $23 less at Costco than from the brand itself.
An independent look at PERFECT Sports DIESEL New Zealand Whey Protein Isolate: the 90% protein spec, stevia-only sweetening, the NPN licence, banned-substance testing, and why buying direct from the brand is usually the worst deal.
An independent look at Good Protein: the full ingredient list, the pea-and-flax protein blend, what the superfood claim is worth, heavy-metal testing, and the price per gram of protein.
How to tell a good protein powder from an expensive one: protein density, source, sweeteners, allergens and third-party testing, plus what the label will not tell you.