The Regrowthy Blog
76 science-backed articles on hair regrowth, treatment, and wellness.
Advanced ScienceThe Hormonal Cascade Beyond DHT: Cortisol, Thyroid, Insulin, and Hair Loss
DHT gets most of the attention, but it's just one player in a complex hormonal orchestra that controls hair growth. Understanding the full picture reveals why comprehensive approaches work best.
Treatment GuidesScalp Massage for Hair Growth: What the Science Says
Can massaging your scalp actually regrow hair? The science is surprisingly positive — when done correctly and combined with the right tools and products.
Advanced ScienceCircadian Rhythms and Hair Growth: Why Timing Matters
Hair follicles have their own internal clocks. Emerging research shows that circadian rhythms influence growth, shedding, and even treatment effectiveness. Here's what you need to know.
Hair Loss ScienceHair Loss Myths Debunked: What Really Causes It
From hats to shampoo to your mother's father, hair loss is surrounded by myths. Here's what science actually says about the causes of baldness.
Results & ProgressMaximizing Your Hair Treatment Results: Advanced Optimization Tips
Already doing the basics consistently? Here are the advanced optimization strategies that can push your results from good to excellent.
Myths & FactsThe 15 Biggest Hair Loss Myths — And the Scientific Truth
From "hats cause baldness" to "only old men lose hair" — we've compiled the 15 most persistent hair loss myths and the actual scientific evidence behind each one.
Advanced ScienceAutophagy and Hair Follicle Renewal: Cellular Housekeeping for Better Hair
Autophagy — the process by which cells recycle damaged components — plays a surprisingly important role in hair follicle health. Supporting this process could be key to long-term hair maintenance.
Treatment GuidesHair Regrowth Timeline: What to Expect Month by Month
Manage your expectations with a realistic hair regrowth timeline. Month-by-month breakdown of what to expect from LED therapy, laser therapy, and topical treatments.
Conditions & Hair TypesHair Changes with Age: What's Normal and What's Not
Your hair changes at every decade — not just in terms of loss, but in texture, growth rate, color, and thickness. Here's what's normal aging and what deserves treatment.
Results & ProgressHow to Measure Hair Density: Clinical and At-Home Methods
Wondering exactly how much hair you have — and whether it's improving? Here are the clinical and DIY methods for measuring hair density objectively.
Advanced ScienceNitric Oxide and Scalp Blood Flow: Vascular Keys to Hair Growth
Nitric oxide is a tiny molecule with massive implications for hair growth. It controls blood flow to follicles, and understanding it reveals why some treatments work — and how to optimize circulation.
Myths & FactsHair Loss Quick Fixes and Scams: How to Spot Them
"Regrow all your hair in 30 days!" If it sounds too good to be true, it is. Here's how to identify hair loss scams and protect yourself from products that waste your money.
Hair Loss ScienceThe Role of Scalp Health in Hair Growth
A healthy scalp is the foundation for healthy hair. Learn how inflammation, poor circulation, and DHT buildup sabotage growth — and how to fix it.
Treatment GuidesPRP for Hair Loss: Is It Worth the Cost?
PRP therapy promises hair regrowth by injecting your own platelet-rich plasma. But at $500-1,000 per session, is it worth it? We break down the evidence and alternatives.
Conditions & Hair TypesHair Loss After COVID-19: Why It Happens and How to Recover
Up to 30% of COVID-19 patients report significant hair shedding 2-4 months after infection. Here's why it happens and what the science says about recovery.
Results & ProgressHair Loss Before and After: How to Read and Compare Results
Before-and-after photos are the currency of the hair loss world — but not all are honest. Here's how to evaluate results photos, avoid being misled, and take useful ones yourself.
Advanced ScienceMitochondrial Function and Hair Follicle Health: The Energy Connection
Hair follicles are among the most metabolically active structures in the body. When their energy production falters, so does your hair. Here's how mitochondria drive hair growth.
Lifestyle & Wellness20+ Medications That Can Cause Hair Loss (and What to Do About It)
Hair loss is a side effect of dozens of common medications. If you've started shedding after beginning a new prescription, your medication may be the cause. Here's the complete list and your options.
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