This FAQ answers the most common questions about using DHT-blocking foods and supplements for hair loss. Each answer is based on available clinical evidence and established hair restoration science.
General Questions
What is DHT and why does it cause hair loss?
DHT (dihydrotestosterone) is a hormone produced when the enzyme 5-alpha reductase converts testosterone. In men with genetic susceptibility, DHT binds to androgen receptors in scalp hair follicles, causing them to shrink (miniaturize) over time. This process produces progressively thinner, shorter hairs until the follicle stops producing visible hair entirely. DHT-driven hair loss follows the Norwood Scale pattern, starting at the temples and crown.
Which foods block DHT?
The foods with the most evidence for DHT-blocking activity include pumpkin seeds (delta-7-stearine), green tea (EGCG), cooked tomatoes (lycopene), soy products (isoflavones), flaxseeds (lignans), and reishi mushrooms (triterpenoids). These foods inhibit 5-alpha reductase through various plant compounds. None are as potent as prescription finasteride, but they provide a dietary foundation for DHT management.
Which supplements are best for blocking DHT?
Saw palmetto (320mg daily) and pumpkin seed oil (400mg daily) have the strongest clinical evidence from randomized controlled trials. Green tea extract (EGCG, 400-500mg daily) and pygeum bark extract (100-200mg daily) provide additional support. For a detailed evidence review, see the comprehensive DHT-blocking guide.
Are natural DHT blockers as effective as finasteride?
No. Finasteride reduces DHT by 60-70% and halts further hair loss in 80-90% of men, with 65% experiencing regrowth. Natural DHT blockers reduce DHT by an estimated 20-40% and produce more modest results. Natural options work best for early-stage loss (Norwood 2-3) and as complementary support alongside prescription treatments.
Safety and Side Effects
Are DHT-blocking supplements safe?
Most natural DHT blockers have favorable safety profiles. Saw palmetto may cause mild GI upset in some users. Green tea extract can cause caffeine-related effects at high doses. No sexual side effects have been documented in hair loss trials for natural supplements, unlike finasteride, which causes sexual side effects in 2-4% of users. Always consult a doctor before starting any new supplement.
Can women use DHT-blocking foods and supplements?
Women can use dietary DHT blockers and most supplements. Saw palmetto and pumpkin seed oil are generally considered safe for women, though clinical hair loss data is primarily from male studies. Women should consult a dermatologist before starting any DHT-blocking regimen, especially if pregnant, nursing, or taking hormonal medications.
Do DHT blockers affect testosterone levels?
Natural DHT blockers target the conversion of testosterone to DHT, not testosterone production itself. Serum testosterone levels typically remain stable or may increase slightly (since less is being converted to DHT). This differs from anti-androgen medications that directly reduce testosterone.
Practical Questions
How much do DHT-blocking supplements cost per month?
A basic protocol (saw palmetto alone) costs $8-15 per month. A mid-range stack (saw palmetto + pumpkin seed oil + EGCG) runs $30-45 per month. A full premium stack with additional supplements costs $45-65 per month. Generic finasteride costs $10-30 per month for comparison.
Can I take DHT blockers with other hair loss medications?
Yes. Natural DHT blockers can be combined with finasteride, minoxidil (40-60% regrowth), and PRP therapy ($500-2,000 per session). Since they work through partially different pathways, combining natural and prescription approaches may provide broader DHT suppression. Always inform your doctor about all supplements you take.
When should I switch from natural DHT blockers to finasteride?
Consider switching or adding finasteride if after 6 months of consistent natural DHT blocker use you see continued hair loss progression, no measurable improvement in hair density, or advancement to a higher Norwood stage. At Norwood 4 and above (2,500+ grafts needed for transplant), finasteride is generally recommended as the primary treatment. Read the finasteride vs hair transplant comparison for more guidance.
Transplant-Related Questions
Should I use DHT blockers before a hair transplant?
Yes. Starting DHT-blocking supplements 6 months before surgery helps stabilize your hair loss pattern. This gives your surgeon a clearer picture for surgical planning and may reduce the total grafts needed. Stop blood-thinning supplements (fish oil, vitamin E, ginkgo) 2 weeks before surgery, but saw palmetto and pumpkin seed oil are typically safe to continue.
Should I use DHT blockers after a hair transplant?
Yes. Transplanted grafts (90-95% survival rate with FUE) are DHT-resistant, but your native hair is not. DHT-blocking foods and supplements protect the non-transplanted hair surrounding your grafts. Start oral supplements 2-4 weeks post-surgery and topical products after 4 weeks, once the recipient area is fully healed.
Do I need DHT blockers if I had a transplant and take finasteride?
Adding natural DHT blockers on top of finasteride is optional but provides incremental benefit. Finasteride targets Type II 5-alpha reductase, while some natural compounds affect Type I as well. The additional cost ($15-45/month) may provide broader DHT coverage, though the marginal benefit is small compared to finasteride alone.
Next Steps
The best DHT-blocking approach depends on your current Norwood stage and how far your hair loss has progressed. Get a free AI assessment at myhairline.ai/analyze to determine your stage and receive personalized recommendations for natural DHT blockers, prescription options, or surgical treatment.
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Consult a board-certified dermatologist before starting any treatment for hair loss.