Why Supplement Brands Don't Want You to Compare Their Prices

Comparing supplement prices should be simple: two bottles, two prices, pick the cheaper one. In practice, brands work hard to make comparison difficult — and they have good reason to. A buyer who can compare prices accurately will usually buy the cheaper product, and the cheaper product is often the one with the smaller marketing budget. Here is how brands stop you comparing, and how to compare anyway.

The first trick is the serving size. Two products can list the same price per bottle but contain very different numbers of servings: one bottle holds 30 servings, another holds 60. The price per bottle is meaningless; the price per serving is the real comparison. Brands that sell a 30-serving bottle at the same price as a competitor's 60-serving bottle are charging double, and hoping you will not do the division. Always calculate the cost per day — the price divided by the number of servings — before comparing anything.

The second trick is the dose. A product that costs half as much but contains a quarter of the active ingredient is not cheaper; it is more expensive per milligram of what you are actually buying. Compare the cost per milligram of the key ingredient, not the cost per bottle. This is where proprietary blends do their worst work: when the individual doses are hidden, you cannot calculate the cost per milligram at all, and comparison becomes impossible — which is exactly the point.

The third trick is the bundle. "Buy two, get one free" and subscription discounts make the headline price look generous while obscuring the unit cost. A bundle that gives you three bottles for the price of two is a genuine saving only if you would have bought three bottles anyway; if you would have bought one, you have spent more, not less. Subscription discounts work the same way: a 20% discount on a product that is already 40% overpriced is not a bargain. Compare the single-bottle, one-off price first, and treat bundles and subscriptions as separate decisions.

The fourth trick is the unique formula. Brands deliberately create formulas that are hard to compare: a slightly different combination of ingredients, a proprietary blend, a "unique" delivery system. If no other product has the same formula, no other product can be directly compared — and the brand can charge whatever it likes. But the uniqueness is often cosmetic: the same core ingredients, in similar doses, with one or two minor additions that justify a new name and a higher price. Compare the core ingredients and their doses, and ignore the rest.

The fifth trick is the channel. The same product can cost different amounts on the brand's own site, on a marketplace, and in a shop — and the price can change depending on whether you are logged in, whether you have a discount code, or whether you are on a subscription. Brands use this to segment their customers: the price-sensitive buyer finds the deal, the hurried buyer pays full price. Before buying, check at least two channels, and check whether the price changes when you are not logged in.

Comparing prices is not about finding the cheapest product. It is about finding the best value — the most of what matters, for the least money. A product that costs more per bottle but contains twice the dose, in a better form, with published testing, may be the cheaper choice in the end. The brands that make comparison hard are the ones with the most to lose from it. The brands that make it easy — clear doses, clear servings, clear prices — are the ones worth your money.

For more on how to assess a brand before buying, see The Supplement Rating and read this supplement safety guide. You can also see how one reviewed product is assessed in this HorsePeak Gelatin review.