Evergreen monthly benchmark — May 18
Hair Growth Supplements
May 18Rank Trend
How top brands moved week over week. Rank 1 is the top position.
For a 36-year-old postpartum mom with stress shedding, AI recommendations consolidate around two brands - Nutrafol and Viviscal - across every model and every prompt. A third tier exists for Ritual, Pink Stork, and MaryRuths, but they only appear when budget constraints are introduced. The strongest cross-model signal is that bloodwork (ferritin, vitamin D, TSH) is positioned as higher ROI than any supplement.
Top Brands by AI Mention Frequency
Mention frequency counts how many times a brand appeared across all AI responses. This differs from top-pick rank, which reflects each model’s #1 choice.
Opportunity for Brands
- Mid-price postpartum-targeted DTC brands beyond Nutrafol and Viviscal (Hers, Vegamour, Vegan-brand entries) are nearly absent.
- Saw palmetto and oral minoxidil prescription pathways are not represented.
- Iron-specific brands marketed for postpartum hair loss (Blume, Active Iron) do not surface.
- Adaptogen-specialty brands beyond what is already inside Nutrafol are absent.
Cross-Agent Comparison
How 4 AI models rank the same category. Hover a brand to trace it across models.
4 agents · top 3 each
Pink Stork leads in total mentions (3) but doesn’t appear below. High mention volume doesn’t always equal top-pick authority.
| Agent | #1 | #2 | #3 |
|---|---|---|---|
| chatgpt | Nutrafol | Naturelo | Viviscal |
| claude | Nutrafol | Viviscal | Baby Blues |
| gemini | Nutrafol | Viviscal | Ritual |
| perplexity | Nutrafol | Ritual | Viviscal |
Pink Stork·3 mentions, outside top 3 for all models | |||
All 4 models agree on Nutrafol as the top pick
What This Means
- ChatGPT is the broadest brand surface (NATURELO, Mommys Bliss, Codeage, Swisse, Nature Made - many obscure budget picks).
- Gemini converged on the strongest dermatologist-narrative stack (Nutrafol, Viviscal, MaryRuths, OUAI).
- Claude is the most aggressive at refusing to recommend supplements without bloodwork first And was the only model to explicitly say SKIP Nutrafol at the budget tier.
- Perplexity is the most clinical, citing PubMed and dermatology sources, and is unique in pointing to topical minoxidil as having stronger evidence than supplements.
Why These Brands Win
- Postpartum-specific formulation, dermatologist or OBGYN credibility claim, breastfeeding-safe label, ashwagandha or marine collagen hero ingredient, and 3-6 month consistency timeline are the recurring traits.
- Hero SKUs: Nutrafol Postpartum, Viviscal Extra Strength, Ritual Essential Postnatal.
Frequently Asked Questions
What hair growth supplements does AI recommend most?▾
Which hair growth supplements brand ranks #1 across all AI models?▾
Why does ChatGPT recommend different hair growth supplements than Claude?▾
What hair growth supplements brands are invisible to AI?▾
How we measure this
Each benchmark runs the same standardized prompts across multiple leading AI systems, including ChatGPT, Claude, Gemini, and Perplexity. We use consistent, category-specific questions designed to surface genuine product recommendations — not sponsored results.
Responses are parsed to extract brand mentions, rank position, and frequency. We then analyze cross-model agreement, identify which brands consistently appear in top positions, and flag where AI outputs diverge from marketplace trends.
Evergreen categories are benchmarked monthly. Results reflect organic AI behavior at the time of testing. Read the full methodology
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Conducted personally by Robert Hu.
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