Determining whether a shampoo is clarifying or not can be done by examining its ingredients, checking for specific characteristics, and considering the intended purpose of the product. Here are a few key factors to consider:

1. Ingredients: Look for certain ingredients that are commonly found in clarifying shampoos. These ingredients include surfactants like sodium lauryl sulfate (SLS) or sodium laureth sulfate (SLES), which are known for their strong cleansing properties. Additionally, you may find ingredients like citric acid, tea tree oil, or witch hazel, which help to remove buildup and excess oil from the scalp.

2. Product Description: Read the product description or label carefully. Clarifying shampoos are often marketed as deep-cleansing, purifying, or detoxifying. These descriptions indicate that the shampoo is formulated to remove residue, product buildup, and impurities from the hair and scalp.

3. Frequency of Use: Clarifying shampoos are typically not meant for everyday use. They are designed to be used occasionally, usually once a week or every few weeks, depending on your hair type and needs. If a shampoo specifies that it should be used sparingly or intermittently, it is likely a clarifying shampoo.

4. Texture and Feel: Clarifying shampoos often have a different texture compared to regular shampoos. They may feel more watery, less creamy, or produce less lather. This is because they are formulated to focus on cleansing rather than providing excessive moisture or conditioning.

5. User Reviews: Reading reviews from other customers can provide insights into a shampoo's clarifying properties. Look for feedback that mentions the shampoo's ability to remove buildup, refresh the scalp, or leave the hair feeling thoroughly clean.

Remember, while clarifying shampoos can be beneficial for removing buildup, they can also be more stripping and drying than regular shampoos. It's important to follow up with a conditioner or hair mask to restore moisture and maintain the overall health of your hair.