Onion for Hair: What It Does (and the 87% Myth)
Onion is the most-asked hair ingredient in the Gulf — and the most over-claimed. Here is the honest version: what onion actually does, what that famous 87% number really means, and how we use it without the myth.
The 87% you keep seeing
The viral claim — ‘onion regrew hair in 87% of people’ — comes from a single 2002 study (Sharquie, J Dermatol; Scopus cited 83×). It used raw onion juice on alopecia areata, an autoimmune condition where hair falls in patches — not the gradual thinning most people mean. And the dose was crude juice, which no shampoo or serum contains. Real study, wrong headline.
Onion, honestly
| The claim | What’s actually true | Verdict | Source |
|---|---|---|---|
| ‘Onion regrows hair — 87%’ | From a study on alopecia areata using raw onion juice — an autoimmune condition, not everyday thinning, at a dose no product contains. | Myth — different disease | Sharquie, 2002 · Scopus 83× |
| ‘Onion shampoo grows hair’ | A wash rinses out in minutes. Onion supports scalp microcirculation; the density work is the peptide’s job, not the wash’s. | Supporting role only | — |
| ‘Onion oil thickens hair’ | It conditions and stimulates the scalp; on its own it is not a thickening active. | Conditioning, not density | — |
| What onion genuinely does | Improves scalp microcirculation and adds sulfur compounds + antioxidants — a better environment for the hair you have. | Real, but a supporting actor | mechanism |
How Tara uses onion
We pair onion with peptides, on purpose. Onion brings the microcirculation and antioxidant support; Capixyl (a red-clover peptide) carries the density signal. Neither is sold as a miracle — they do different jobs. See the Onion + Peptides range, the Follicle-Stimulating Scalp Serum, or the Volumizing Shampoo.
What onion will NOT do
On its own, onion will not reverse pattern (hormonal) baldness, and it is not the 87% headline. If you are shedding diffusely, the cause is more often iron or vitamin D than anything a shampoo can fix — see the UAE data. Onion earns its place as a supporting actor, and we sell it as one.
Related
which hair ingredients actually work · do hair oils grow hair? · فوائد البصل للشعر (Arabic).
Source: Sharquie K.E. & Al-Obaidi H.K. Journal of Dermatology 2002 (Scopus 83×). Live Scopus count, June 2026.