Questions, answered plainly.

Once a week, about 10 minutes. 3 weeks on, 4th week off. Wash and fully dry your scalp, fill the device with one vial, hold it upside down for 2 minutes, then stamp your hairline, crown and temples. Full steps are on How It Works.

No. Customers describe a light tingle, and many say they feel nothing at all. No numbing cream needed.

No. Every month's supply comes with a fresh sterile device. Never share a device.

A roller rolls at an angle and can tug hairs; TREVO stamps straight down between them. The serum is loaded in the device and applied in the same move, from a pre-measured vial. And you get a fresh sterile device every month instead of the same needles for months.

9 clinically studied actives — adenosine, caffeine, saw palmetto, red clover, acetyl tetrapeptide-3, biotinoyl tripeptide-1, panax ginseng, apigenin and oleanolic acid — in 36 ingredients total. The full list is on our Ingredients page and printed on every kit.

TREVO is a cosmetic and contains no minoxidil. If you use minoxidil or any prescription treatment, ask your doctor or pharmacist before adding TREVO to your routine.

Many customers say they notice less shedding within the first 6 weeks. Hair grows in slow cycles — judge it at 3 to 6 months. Individual results vary, and results are not guaranteed.

Hair grows and sheds in cycles, so the amount you lose day to day varies naturally. If you notice a sudden increase, stop using TREVO and email support@try-trevo.com.

Customers report a light tingle at most. Do not use on broken, irritated or infected skin, or with active psoriasis or eczema. If you take blood thinners or have a scalp condition, ask a doctor first. Patch test before your first session, and never share a device.

Standard shipping is free on every order and takes 7–14 business days to the USA, Canada, Australia and the United Kingdom. Expedited shipping (5–7 business days) is available at checkout for $9.99. We email tracking as soon as your order ships.

The USA, Canada, Australia and the United Kingdom. We do not ship to other countries at the moment.

No. Duties and import taxes are included in the price, so there is nothing extra to pay on delivery.

Prices are shown in your local currency, converted from US dollars at the current exchange rate. You pay the same amount you see at checkout.

That is us. Charges for TREVO orders and subscription renewals appear on bank statements as “TREVO HAIRCARE”. If you don’t recognise a charge, email support@try-trevo.com before contacting your bank. We’ll explain it or refund it quickly, with no hassle.

Go to try-trevo.com/manage, log in with your email and choose Cancel. It takes two clicks and you never need to email us. You can skip or pause there too. If you prefer, email support@try-trevo.com and we will cancel it for you.

Subscriptions renew at the same price every 1 month ($69.99), 2 months ($129.99) or 3 months ($149.99), matching the supply you chose. We email you before every renewal.

Email support@try-trevo.com within 90 days of delivery and we refund everything you paid in your first 90 days. No need to send anything back. We process it within 1 business day; your bank usually shows it within 5–10 business days.

Every charge in your first 90 days after your first delivery. A 1-month subscriber billed 3 times ($209.97) gets all of it back. It applies once per customer, to new customers. Charges after day 90 and later repeat orders are not covered.

TREVO is a trading name of PM ONLINE MEDIA LLC, 1309 Coffeen Avenue, Ste 1200, Sheridan, WY 82801, USA. A real person answers support@try-trevo.com, Monday to Friday, 9am–6pm ET. Every order has a 90-day money-back guarantee, and subscriptions cancel in two clicks.

TREVO is designed in the USA and made with globally sourced ingredients. The full ingredient list is printed on every kit and on our Ingredients page.