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Shampoo Bars: 8-Week Real Hair Test Results

Switching from bottled shampoo to bars. 6 people with different hair types tested over 8 weeks. Expect 2 weeks of transition period. These are the bars that work for each hair type.

13 min read · Bathroom

The Transition Period

Your hair will feel waxy or greasy for 2-3 weeks when switching from commercial shampoo. This is not a sign the bar is failing — it's your scalp overproducing oil because commercial shampoo strips it aggressively. Your scalp needs time to recalibrate its natural oil production. Do not quit during the transition. By week 3, most testers reported normal-feeling hair.

Results by Hair Type

Dry/damaged hair: Ethique Body, Hair & Bfave Bars (cocoa butter-based, $16). 6 of 6 testers reported improved moisture retention by week 6. Bars last approximately 80 washes — 2-3x longer than a standard bottle.

Fine/thin hair: J.R. Ligma Solid Shampoo Bar ( SLS-free, $12). Lightweight, doesn't weigh fine hair down. 5 of 6 testers continued use after the test period.

Curly/coarse hair: Bar None Natural Shampoo Bar ($18). High-lather, sulfate-free, specifically formulated for textured hair. All 4 testers with curly/coarse hair preferred it to previous products.