Evidence Review

Review the evidence behind popular ingredients, supplements, devices, and emerging hair-loss claims, with practical limits and safety context.

Three plain white tablets on a pale grey surface beside a blank notebook and pen

12 min read

VDPHL01: What the Extended-Release Oral Minoxidil Trials Show

VDPHL01 is minoxidil in a slow-release tablet, not approved anywhere. Where its three trials stand, and the five things to have a baseline for.

Strands of dark hair beside a dried autumn leaf on a pale surface, representing seasonal hair shedding

8 min read

Seasonal Hair Shedding: Why Autumn Sheds More, and How to Tell It From Balding

Human hair sheds on a seasonal rhythm that peaks in autumn. Here is how to tell a shed that resolves from pattern loss that does not, and what to measure.

A ceramic tint bowl and tinting brush on a grey surface beside a folded towel, representing hair colouring

8 min read

Does Hair Dye or Bleach Cause Hair Loss? Breakage vs Shedding

Bleach damages the hair shaft but does not reach the follicle. Here is how to tell breakage from shedding by eye, and when dye genuinely causes hair loss.

Sugar cubes beside a glass of water representing diet and hair loss tracking

7 min read

Sugar, a High-Glycemic Diet, and Hair Loss: What the Evidence Says

No good evidence that sugar causes baldness. The insulin resistance association, and the one dietary change that really does trigger shedding.

An amber dropper bottle beside a leaf representing niacinamide serum for hair and scalp

5 min read

Niacinamide for Hair Loss: What the Evidence Actually Shows

Review the limited human evidence for niacinamide and hair loss, its plausible scalp benefits, where it may fit, and how to track any change.

Quiet still life with a cup of green tea evoking evidence review of EGCG for hair loss

5 min read

Green Tea and EGCG for Hair Loss: Evidence

Good laboratory data, almost no human hair-growth data. What the EGCG studies do and do not show.

Vitamin D softgels on a sunlit wooden table representing vitamin D supplementation for hair health

5 min read

Vitamin D and Hair Loss: What the Evidence Shows

Review the evidence linking vitamin D and hair loss, when testing may be appropriate, why self-dosing can be risky, and how to track recovery.

Biotin capsule on a lab requisition slip representing biotin supplementation and lab test interference

5 min read

Biotin for Hair Loss: Evidence and Myths

Without a deficiency the evidence is thin, and high doses distort lab results. What the research actually supports.

Castor oil bottle and hair loss evidence review

5 min read

Castor Oil for Hair Loss: Evidence Review

There is no clinical evidence that castor oil regrows hair. What it may do to the shaft, and how to read the claims around it.

Hair dryer and flat iron heat styling effects on hair loss

7 min read

Heat Styling and Hair Loss: What It Causes

Heat damages the shaft, not the follicle. Why that still makes thinning look worse, and what is worth changing.