Good question. Short answer: not necessarily — no hair product “works for everybody”, because hair loss can have many different causes. But a DHT-blocking scalp serum can help a lot of people, depending on what type of hair loss they have. Here’s a breakdown:

Why It Might Work for Many (But Not All)

1. 
   Targeting DHT-related Hair Loss
   
   
   Many hair-thinning problems (like androgenetic alopecia / “pattern” hair loss) are driven by DHT (dihydrotestosterone). Serums that block DHT are more likely to help in these cases. Scalp Solution+2Scalp Solution+2
   
   
   But if your hair loss isn’t DHT-driven (for example, hair loss from stress, certain medications, or health conditions), a DHT blocker may not be enough by itself. Longevita Hair Transplant
   
   
   
2. 
   Effectiveness Varies
   
   
   The strength and type of DHT-blocking ingredients matter a lot. Some topical (applied to scalp) blockers are more effective than others. Scalp Solution
   
   
   There are mixed results on how well DHT-blocking shampoos or serums work — some sources say they “may not work for everyone.” Treatment Rooms London
   
   
   Even people using strong treatments don’t always get full regrowth, depending on how advanced their hair loss is. hamiltonmedical.com.au
   
   
   
3. 
   Consistency and Time
   
   
   These treatments usually need consistent, long-term use to see results.
   
   
   It can take weeks to months to notice visible improvements. Ubuy Australia+1
   
   
   
4. 
   Individual Biology
   
   
   Everyone’s scalp, hair follicles, and hormone levels are different. What works really well for one person might not work as well for another.
   
   
   Absorption can vary — how well the serum penetrates your scalp and how your body responds matter a lot. Reddit
   
   
   Some people report stopping responding to DHT blockers after a while. Reddit+1
   
   
   

Examples of Other Scalp Serums

To illustrate, here are a few other scalp serums (with different ingredients) — showing that there are many approaches, not just one-size-fits-all:

• 
  Aveda Invati Ultra Advanced Scalp Revitalizing Serum — targets scalp health and strengthening, not purely a DHT blocker
  
• 
  Maximum Strength DHT‑Blocker Hair Regrowth Serum — more focused on DHT inhibition
  
• 
  Patricks RD2 Anti‑Hairloss Serum — a peptide-based formula that supports scalp health
  

Conclusion

• 
  Yes, a DHT-blocking scalp serum can work for many people, especially those with DHT-driven hair thinning.
  
• 
  No, it's not guaranteed to work for everyone, because hair loss causes differ.
  
• 
  Best approach: If you're unsure what's causing your hair thinning, it's smart to consult a dermatologist or trichologist. They can help you figure out whether DHT is a major factor — and whether a DHT-blocking serum is likely to help you.