Title: What shampoo can wash dark hair? Popular topics and scientific analysis on the Internet in the past 10 days
Recently, the discussion on "whether shampoo can wash dark hair" has soared on social media, with many users sharing their so-called product experiences of "turning black hair as soon as washed", triggering widespread controversy. This article will analyze this phenomenon from a scientific perspective based on hot data from the entire network in the past 10 days, and sort out the evaluation results of popular shampoos.
1. Hotspot data tracking across the entire network (June 1st - June 10th)
| platform | Related topic readings | Hot search highest ranking |
|---|---|---|
| 230 million | TOP5 | |
| Tik Tok | 180 million views | Life list TOP3 |
| little red book | 4.5 million notes | Beauty care category TOP1 |
2. Analysis of the focus of controversy
1.Instant color shampoo: Contains temporary hair dye ingredients (such as CI 77266), which achieves temporary coloring through cationic deposition and gradually fades after 48 hours.
2.Hair nourishing shampoo: Contains polygonum multiflorum, black sesame and other plant extracts. It requires long-term use to improve hair quality and cannot darken hair in a short period of time.
3.Optical modification technology: Some products add reflective particles such as mica to produce a visual blackening effect under specific light.
3. Actual measurement comparison of popular products
| Product name | claimed effect | actual test results | security |
|---|---|---|---|
| A brand black series | 7 days for black hair | Temporary dyeing, fading after 3 shampoos | Contains parabens |
| B Chinese medicine hair nourishing lotion | 3 months solid color | No obvious coloring, improved hair quality | Non-irritating |
| C imported optical shampoo | Instant brightening | Color develops under strong light, no change in daily life | Contains fragrance |
4. Expert advice
1.temporary needs: Choose a shampoo clearly labeled "semi-permanent coloring" and do a skin test before use.
2.Long term maintenance: Shampoo containing vitamin B5 and cystine can improve hair cuticle health, combined with scalp massage.
3.A Guide to Avoiding Pitfalls: Be wary of exaggerated propaganda such as "one wash will last forever" and "gene repair". Such products often contain high doses of chemical dyes.
5. Real feedback from consumers
| User type | Satisfaction | Main complaint |
|---|---|---|
| gray-haired people | 62% | Uneven dyeing/pillowcase contamination |
| People with damaged hair due to dyeing | 78% | Hair quality improved but not darkened |
| curious experimenter | 35% | There is a big gap with the publicity effect |
Conclusion:Currently, no shampoo can truly change hair melanin. Consumers should choose temporary dyeing or long-term maintenance products according to their needs. Data from the General Administration of Quality Supervision, Inspection and Quarantine show that in 2024, the failure rate in random inspections of hair dye shampoos will reach 17%. It is recommended to look for the "National Cosmetic Special Character" approval number when purchasing.
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