Onion is among the most-studied hair ingredients: in a controlled 2002 trial, topical onion juice produced visible regrowth in 20 of 23 users (87%) at six weeks versus 13% for tap water (PMID 12126069, Scopus cited-by 83). That used crude juice, not shampoo. Tara's onion-and-peptide shampoo uses standardized onion extract plus peptides for fuller-looking hair.

A shampoo that works at the follicle targets the DHT pathway. Biochanin A from red clover was among the most potent isoflavonoid inhibitors of 5-alpha-reductase tested, selective for the type-2 isoform dominant in the scalp (in-vitro; manufacturer-funded, disclosed — PMID 7490559, Scopus cited-by 370). Tara's onion-and-peptide shampoo pairs this peptide complex with onion extract for thicker-looking, denser hair.

Hair growth follows a biological cycle, so results appear over months, not days. In a 24-week trial, a biochanin-A + acetyl-tetrapeptide-3 + ginseng combination raised terminal hair count +8.3% versus +8.7% for 3% minoxidil, with no statistically significant difference (PMID 33584955, n=32). Tara's onion-and-peptide shampoo carries the same peptide class; use it consistently within a routine.

One proposed onion mechanism involves quercetin, a flavonoid that supported perifollicular blood-vessel formation via HIF-1alpha in animal models — the vascular bed that feeds hair follicles (mechanistic/animal evidence, not a human outcome — PMID 37285263). Tara's onion-and-peptide shampoo uses onion extract rich in flavonoids and organosulphur compounds to support the scalp environment and hair growth.

Onion shampoo is washed in and rinsed out, making it gentler on the scalp than crude onion juice, which caused mild redness and irritation in roughly 60% of users in the landmark trial (PMID 12126069). Consistent use as directed is what supports results, since hair growth runs on a months-long cycle. Tara's onion-and-peptide shampoo is built for regular use within a hair-care routine.

No. All products in our Onion + Peptides range have a fresh, floral fragrance. The onion extract is added only for its stimulating properties and has no odor.

Yes. These formulas are suitable for all hair types and can be used safely on colored or chemically treated hair.

Because shampoo needs water to activate and distribute properly. Adding a few drops of water and rubbing it between your hands before applying encourages more foam. Wetting hair thoroughly helps cleanse effectively without irritating the scalp or overloading the hair.

As often as you need. Our shampoos are sulfate‑free, so they cleanse gently without stripping the scalp’s essential oils or disrupting its pH.

Yes, although it’s best paired with our conditioner from the same range to optimize results. Our shampoo deeply cleanses follicles and the conditioner restores natural hydration. We recommend completing the full 3‑step treatment for at least 3 months to reap full benefits.

The first shampoo removes dirt and residue; the second allows the shampoo to act and treat the scalp properly, leaving hair cleaner and healthier.