The most reliable way to choose is by porosity, low, medium, or high, not just by visual texture like straight, wavy, or coily. Porosity determines how well hair actually absorbs and holds moisture, and it's the detail that decides whether a formula works.
Two customers with the exact same hair type can have completely different porosity, and completely different needs. Stocking wholesale shampoos and conditioners around porosity instead of texture alone is what turns a one-time sale into a reorder.
The Quick Way to Check Porosity
Drop a clean strand of hair into a glass of water and watch what happens. Hair that sinks fast has high porosity, hair that floats has low porosity, and hair that sinks slowly sits in the middle.
This simple test takes under a minute and gives customers, or your sales team, a clear starting point before choosing a formula.
Low Porosity: Hair That Resists Moisture
Low porosity hair has tightly closed cuticles, so product tends to sit on top instead of absorbing. Heavy creams and butters mostly just sit there. They build up instead of soaking in.
Look for lightweight, water-based wholesale shampoos and conditioners with humectants like glycerin. They pull moisture in without dragging hair down. Toss in a clarifying formula now and then, and buildup stays out of the picture.
Medium Porosity: The Easiest Hair to Work With
Medium porosity hair is the easy customer. It takes in moisture at a steady, predictable pace, and most standard wholesale shampoos and conditioners do the job without any tweaking.
The real risk here isn't the hair itself, it's what happens to it. Color treatments and heat styling can push medium porosity toward high porosity over time. A balanced formula, moderate protein, moderate moisture, covers most people in this group.
High Porosity: Hair That Loses Moisture Fast
High porosity hair has raised or damaged cuticles. Moisture rushes in, then rushes right back out. This hair type needs richer formulas that seal moisture in, not just add it.
|
Porosity |
How to Test |
What to Stock |
What to Avoid |
|
Low |
Strand floats in water |
Lightweight, water-based, humectants |
Heavy butters, protein-heavy formulas |
|
Medium |
Strand sinks slowly |
Balanced protein-moisture formulas |
Frequent over-processing |
|
High |
Strand sinks quickly |
Rich sealants, black castor oil, deep conditioners |
Formulas without a sealing step |
Wholesale shampoos and conditioners built with black castor oil or other heavy sealants work well here, since this hair type needs a barrier to hold onto moisture after washing.
Building an Inventory That Covers All Three
Stock at least one clarifying, one balanced, and one deep-moisture option to cover the full porosity range. A single generic formula rarely satisfies the whole spectrum of customers walking through your door.
Retailers who bundle a starter trio (one per porosity level) tend to see fewer one-and-done purchases, since customers are more likely to find something that actually works for their hair on the first try.
Ask This One Question Before You Stock a New Line
Ask the supplier what porosity range a formula was designed for, not just what hair type it targets. A supplier who can answer this in detail understands hair science, not just marketing language.
Wholesale shampoos and conditioners marketed only by generic hair type (curly, straight, wavy) without any mention of porosity or moisture behavior are usually formulated more broadly, and may underperform for customers at either end of the porosity spectrum.
Stock a Porosity-Ready Lineup With Us
Our haircare catalogue includes black castor oil, rice water, and tea tree and peppermint formulas alongside the Hair Star shampoo and conditioner line, giving you real coverage across porosity levels without guessing. Every formula ships with a low minimum order so you can test what actually moves before committing to a full case.
Building a porosity-based starter set? Get in touch with and stock wholesale shampoos and conditioners your customers will actually reorder.
