The Pink Tax on Protein Hides in the Brand Name

The pink tax is one of the best-documented quirks of modern shopping. When New York City's consumer affairs department compared nearly 800 products in 2015, versions marketed to women cost 7% more on average, and 13% more for personal care.¹ Razors, shampoo and kids' scooters have all had their turn in the headlines.

Protein powder hasn't, even though the shelf looks like a textbook case: pastel tubs, "lean" and "sculpt" on the label, "for her" in the name. We couldn't find a single published price comparison. So we built one.

How we compared#

We collected 21 pairs of protein powders sold in the US and UK. Each pair puts a product marketed to women next to its closest standard equivalent: the same brand's regular product where one exists, otherwise a mainstream product with the same protein source and a similar tub size.

Comparing tub prices is useless when one holds 450 g and the other 2 kg, and some scoops hold more protein than others. So we compared what you actually buy protein powder for: the price of 25 grams of protein, roughly one serving. All prices come from the brands' own online shops on November 15, 2026. They are a snapshot of that day: shops change prices and run sales often, so what you see today may differ. Details and limits are in the methods section.

Same brand, same price#

The first result surprised us. When a brand sells both a regular and a women's version, the women's version was usually the cheaper one per gram of protein.

• One US brand's whey "for women" cost 29% less per gram of protein than the same brand's regular whey concentrate.
• A UK brand's "skinny" protein cost 13% less than its regular whey.
• A collagen powder "for women" cost 12% less than the same brand's regular collagen.

The exception is a diet shake with added fibre and green tea extract. At list price, its protein cost 89% (UK) and 65% (US) more than the same brand's regular whey. On the day we checked, though, it was on sale at a third of its list price and came out cheaper. More on that below.

Across all six same-brand pairs, the women's version came out a median 5% cheaper at list price. That matches a large 2023 study of US supermarket products, which found that the pink tax mostly disappears once you compare products from the same manufacturer with the same key ingredients.²

The markup lives in women-focused brands#

The picture flips when the women's product comes from a brand that sells mainly or only to women. We found seven of them with public prices and labels. Compared with a mainstream powder with the same protein source, these cost more in 14 of 15 pairs. The median markup was 57% at list price.

The extreme case is a vanilla pea-protein powder from a women-focused US brand. Per 25 g of protein it cost $4.08. A mainstream plain pea protein cost $1.40. That's a markup of 192%, although the women's product adds fibre and a "superfood" blend.

Which price counts?#

One brand complicates the picture, and it appears in nine of our pairs. On the day we checked, Brand A sold every product we recorded below its crossed-out list price: between 10% (its regular whey) and 66% (its diet shake).

That matters. At list prices, the median markup across all 21 pairs was +42%. At the prices actually charged that day, it shrank to +8%, and several Brand A products became cheaper than their comparison. For women-focused brands alone, the markup at sale prices was still +28% (12 of 15 pairs more expensive).

We report both numbers because neither tells the whole story. List prices are what brands say their product is worth. Sale prices are what you would have paid on one Sunday in November, less than two weeks before Black Friday.

Pink it and shrink it#

Price per gram is only half of it. In 14 of 21 pairs the women's product put less protein in each serving, a median of 4 g less.

Typical women's products deliver 15–20 g per scoop, where standard products sit at 24–25 g. One whey "for women" is a good example: the powder itself is protein-dense, the scoop is just smaller (19 g of powder, 15 g of protein, against 25 g of protein in the same brand's regular whey). One diet shake advertises 20 g of protein per shake, but that includes 250 ml of milk. The powder alone contains 11.4 g.

A smaller scoop isn't a trick by itself. It does mean that "one shake" buys you less, and that a price per serving can look friendly while the price per gram of protein is high. People who've worked in the industry have a name for the approach: "pink it and shrink it".³

The extras#

What fills the space? We went through the ingredient lists of the 17 different women's products in our data.

¹ Green tea extract, L-carnitine, CLA, green coffee, caffeine, guarana or chromium. ² Biotin, hyaluronic acid or “hair, skin & nails” claims. Brand A products sold in both the UK and the US counted once. Source: brands' labels, Nov 15, 2026.

10 of 17 women's products contained at least one of three kinds of extras:

• "Fat-burning" ingredients (5 products): green tea extract, L-carnitine, CLA, green coffee, caffeine, guarana or chromium, often bundled as a "metabolism" or "thermogenic" blend.
• Collagen (5 products), sometimes as the main protein source. Collagen lacks an essential amino acid (tryptophan), so it counts as protein on the label but does less for muscle than whey or pea protein.⁴
• Biotin, hyaluronic acid or "hair, skin & nails" claims (8 products). One collagen powder for women contains 5,000 mcg of biotin per serving, 16,670% of the daily value.

None of the standard products we compared them with contained any of these, apart from the collagen powder we paired with a collagen powder.

What to check before you buy#

You don't need a spreadsheet to avoid paying extra:

1. Work out the price per 25 g of protein. Price ÷ (servings × grams of protein per serving) × 25. It takes ten seconds on your phone.
2. Read the protein line, then the scoop size. 15 g per serving and 25 g per serving are both "one shake".
3. Read the ingredient list for extras you didn't ask for. If you want collagen or a metabolism blend, fine. If you wanted protein, you're paying for them anyway.
4. Check the regular product of the same brand. In our data, the "for women" version usually cost the same or less per gram of protein. Diet shakes were the exception.

How we did this#

Products. We searched public product catalogues of about 60 brand and retailer shops, plus web searches, for protein powders whose name or marketing targets women ("women", "for her", "skinny", "lean", "shape", "sculpt", pink packaging). We included every product for which a public price and a nutrition label were available. Amazon and other large marketplaces were not included. Some known women's lines could not be recorded because the shops blocked automated access, had no public price or no longer listed the product.

Pairs. Six pairs compare a women's product with the same brand's standard product (in one case a sub-brand of the same company). Fifteen pairs compare a product from a women-focused brand with a mainstream product of the same protein type and similar size. The choice of comparison product matters: against a premium brand the markup would be smaller, against a budget brand larger. Brand A's US whey, for example, would be 17% cheaper than a premium whey at sale price, and 63% more expensive than a budget whey. We picked mainstream products and publish every pair.

Prices. Brand-shop prices on November 15, 2026, in GBP or USD, without shipping, subscriptions or bulk discounts. "List price" is the regular or crossed-out price, "price on the day" includes any sale. We chose vanilla or the closest standard flavour, and tub sizes as close to each other as possible. Several products were out of stock on the day. We used their listed price. We saved a copy of every product page and its price data on the day, so each number can be checked.

Protein. As stated by the brand per serving. Where a shop did not state servings per tub, we calculated them from net weight and serving size. We did not test any product in a lab. Protein quality varies: collagen-heavy products look better per gram of "protein" than they are for muscle building.

Classification. Some brands are borderline: Brand H says its "skinny" protein is "made for men and women", and Brands C and G signal their focus on women through marketing more than labels. Leaving out these four pairs makes the women-focused-brand markup larger (+67% at list price, +25% at sale price).

Limits. 21 pairs is a small sample, picked because the data was publicly available. It shows a pattern; it can't put a number on "the market". Prices change daily.

Why we don't name brands. This piece is about a pattern in the market. It would hold with different brands on the shelf, and we don't want it to read as a verdict on any single company. Brands are shown as letters, consistently across the text, charts and data: A to G sell mainly to women, H and I sell both a regular and a women's version, J to O made the comparison products.

Conflicts of interest. None of the products in this comparison is on our list of picks, and this article contains no affiliate links. We bought nothing and received nothing from any of the brands.

The anonymised pairs, with prices per 25 g of protein and protein per serving, are free to download. If you spot an error, tell us and we'll correct it and note the change here.

Sources

1. New York City Department of Consumer Affairs (2015). From Cradle to Cane: The Cost of Being a Female Consumer. nyc.gov ↩

2. Moshary, S., Tuchman, A. & Bhatia, N. (2023). Gender-Based Pricing in Consumer Packaged Goods: A Pink Tax? Marketing Science. Working paper: SSRN 3882214 ↩

3. Joshua Schall, "Supplement Industry Still Has A 'Pink Tax' Problem" (undated, c. 2022). joshuaschall.squarespace.com ↩

4. Collagen protein contains no tryptophan and is therefore an incomplete protein. See e.g. Paul, C., Leser, S. & Oesser, S. (2019). Significant Amounts of Functional Collagen Peptides Can Be Incorporated in the Diet While Maintaining Indispensable Amino Acid Balance. Nutrients, 11(5), 1079. doi:10.3390/nu11051079 ↩