From Root to Ritual

A 2015 randomized comparative trial found rosemary oil matched minoxidil 2% for hair count at 6 months — with significantly less scalp itching. That result is real. But there are three things the citations usually leave out: the comparison was to 2% minoxidil, not the 5% commonly prescribed today. Neither group saw significant results at 3 months — only at 6. And a fresh double-blind RCT (Rosmagain™) now shows 57.73% hair growth rate improvement and 68.70% thickness increase vs placebo. Here is the complete picture.

Saw palmetto (Serenoa repens) inhibits 5-alpha reductase — the same enzyme as finasteride — but at 30-40% compared to finasteride's 70% and dutasteride's 98%. A 2025 RCT showed significant improvement in hair density and quality. A 2026 180-day extension confirmed continued improvement with no adverse events. Here is the complete honest picture — what saw palmetto does, how it compares to pharmaceutical options, who it's enough for, and who needs something stronger.

Bhringaraj (Eclipta alba) is the most revered herb in Ayurvedic hair medicine — used for over a thousand years to promote hair growth and scalp health. A 2025 prospective clinical trial (Journal of Ayurveda and Integrated Medical Sciences) enrolled 54 participants over 24 weeks and found significant reduction in hair shedding corroborated by patient-reported outcomes. Separately, research confirms its petroleum extract performs comparably to 2% minoxidil. Here is what the science actually says about the herb in your Laritelle formula.

A PMC landmark study found 80% of participants in the microneedling plus minoxidil group showed moderate-to-great hair regrowth — vs 4.5% in the minoxidil-only group. A 2025 systematic review confirmed microneedling increases both rate of absorption and onset of action for minoxidil. But a March 2026 JAAD study found that wrong needle size, wrong frequency, and wrong technique actively damage the scalp barrier. Here is the complete picture — what works, what doesn't, and what the 1.0mm vs 1.5mm needle debate actually means.

If you've ever used a highly-rated hair product that did nothing for your hair, hair porosity is likely the missing link. Porosity determines whether water and products actually penetrate your hair shaft or sit on top of it. The float test you've seen on TikTok doesn't work. Here is how to actually test it, what your result means, and the specific product choices each porosity type needs.

"Adrenal fatigue" has 16 million TikTok views and zero recognition from medical organisations as a real diagnosis. What IS real is HPA axis dysfunction — a disruption of the cortisol signalling system that mainstream medicine has documented extensively. The hair loss it causes is genuine: hair thinning, increased shedding, and reduced density are all documented outcomes of dysregulated cortisol. Here is the honest version of the adrenal fatigue story — and what actually helps.

Birth control pills can influence hair health, sometimes improving or worsening hair loss — and the American Hair Loss Association has specific guidance on this that most women are never told when they're prescribed. The key variable: the androgen index of the progestin in your pill. High androgen index progestins can trigger or worsen female pattern hair loss in susceptible women. Low androgen index pills may actually help. Here is how to know which category yours falls into.

A peer-reviewed review of 24 studies covering 1,787 patients found that the Mediterranean diet and isoflavone-rich soy contain anti-inflammatory nutrients that may promote hair health in AGA. The gluten-free diet only helped in AA patients who also had celiac disease — not in people without it. And high mercury fish consumption was linked to AA and telogen effluvium. Most hair-and-diet articles miss both caveats. Here is the honest summary.

A 2024 meta-analysis in the Journal of Cosmetic Dermatology — the first of its kind — quantified the smoking-AGA relationship in men. Multiple peer-reviewed studies confirm smokers have significantly higher rates of androgenetic alopecia. The mechanism is specific: nicotine narrows blood vessels, reducing oxygen to follicles; tobacco toxins increase oxidative stress; and smoking accelerates the hormonal cascade that drives miniaturisation. Most of the research is in men — here is what we know and don't know for women.

A 2024 systematic review and meta-analysis in Alcohol and Alcoholism examined the alcohol-AGA connection. The finding: alcohol doesn't directly cause hair loss, but chronic heavy drinking disrupts nutrient absorption, raises estrogen in men, elevates cortisol, dehydrates the scalp, and disturbs sleep — five of the drivers this series has covered as central to hair loss. And one study found that abstainers had higher rates of crown hair loss than moderate drinkers — a result nobody expected. Here is the complete picture.

A review of 11 studies covering 2,267 patients found positive hair growth outcomes in 8 of them — from melatonin applied directly to the scalp. Not the sleep supplement. The topical version. Hair follicles have their own melatonin receptors and respond to it locally, not through the bloodstream. Here is what the research actually shows — and the one timing detail that makes a real difference.

A study comparing 67 professional swimmers to 54 non-swimmers found no significant difference in hair loss between the groups — despite clear signs of chlorine damage in the swimmers' hair. So chlorine doesn't cause hair loss. But it does strip natural oils, disrupt scalp pH, irritate already-sensitive scalps, and compound the damage from heat styling, chemical processing, and sun exposure — all in the same summer week. Here is the honest picture and the simple pre- and post-swim routine that addresses it.