My week of using a hair growth supplement – any visible changes?

When a bottle promising stronger, fuller hair arrived, I wanted a simple answer: would seven days of a hair growth supplement produce visible changes? I photographed my hair, measured my ponytail and checked the same areas after each wash. This is my personal diary, not a promise that one week reveals what takes months to notice.

I chose a widely sold hair, skin and nails tablet from an Australian chemist for $34.95 AUD, although prices and stock vary across Priceline, Chemist Warehouse and online sellers. Its label listed 5,000 micrograms of biotin, zinc, folate, vitamin B12 and selenium. I checked the AUST LABEL number and full ingredients because a hair-growth claim on the front says little about what you are swallowing.

My starting point was fine, shoulder-length hair with a centre part, mild frizz and regular shedding. Living in Sydney, I also had to account for humidity and constant air-conditioning. I kept my haircut, styling products and wash schedule unchanged, then took one tablet with breakfast each morning.

What I took each day

On day one, I swallowed one tablet with breakfast and recorded the time. The instructions said not to exceed one daily, so I did not double up after a busy morning or leave the bottle beside my bed, where forgetting a dose would be easy.

A pharmacist at my local Chemist Warehouse reminded me that high-dose biotin can distort certain blood-test results, including thyroid and troponin tests. I would need to stop taking it before future pathology, so I added that to my routine. The advice mattered more to me than the packaging because a supplement should fit into a health routine, not complicate it.

The ingredient list also set my expectations. A tablet can help correct a nutritional shortfall, but extra biotin is not a shortcut around sleep, nutrition or an unresolved cause of shedding. I did not expect it to create follicles, and checking the mirror after breakfast would not be a valid trial.

What changed during the week

On days one and two, my hair felt the same after brushing. There was no tingling, itching or sudden increase in body hair. My scalp felt less dry after my usual wash, although that was probably cooler weather and the gentle shampoo I already used.

By day four, my lengths looked slightly shinier in daylight. I wanted to credit the supplement, but conditioner, humidity and morning sun could explain the difference. I repeated the photograph under the same lamp and noticed no clear change in fullness.

My wash routine stayed gentle: lukewarm water, fingertips rather than nails, and careful detangling. These basics are covered well in practical hair care tips, so I changed nothing else. By day seven, my hair still felt soft, but the shine had faded and there was no visible jump in density or length.

Photos, measurements and the mirror

My most useful check was the photo set beside the same window before I started. I included front, side and crown angles, plus a close-up of my part. When I lined up the day-seven images, my hairline and part looked the same. The short strands near my roots had appeared in the first photo too.

My ponytail circumference stayed within a few millimetres, and the elastic made no meaningful difference to how full it looked. I counted strands in the drain for three washes, then stopped because brushing and shower habits change those numbers too much for one person’s count to prove anything.

The mirror was less reliable. On a good lighting day, I could convince myself my hair looked better, then see the same result the next morning. A visible result would require more: new growth takes time to emerge and extend beyond existing roots. Seven days was too short to judge it fairly.

How my routine and climate shaped things

Sydney’s humidity can make fine hair look flat or frizzy, while office air-conditioning leaves my lengths dry by the afternoon. On a work trip to Melbourne, colder, drier winter air and hard tap water made my hair feel rougher after washing. Local conditions altered its appearance from one day to the next, regardless of the tablet.

A week before the experiment, I visited a Melbourne salon for a trim and wash-and-blow; a blow-dry can run from roughly $50 to $100 AUD depending on length and salon. The cut affected how much volume I could see, so my baseline photos were taken afterwards. Readers comparing options can find a trusted salon and ask about heat damage and scalp-focused treatments before booking.

I kept my styling simple with the same elastic, brush and heat protectant. Holding those variables steady left fewer possible explanations, although it also meant the supplement had to create a noticeable difference on its own.

The honest verdict

After a week, I had no visible change in hair growth, length or density. My hair looked a little glossier for two days, but the effect disappeared and could easily have come from moisture or my routine. If the bottle was meant to deliver an obvious transformation in seven days, it did not.

That is not a failure of every hair-growth product. Supplements can be useful when diet or a diagnosed deficiency is involved, but results are normally judged over months rather than days. New hairs need time to grow long enough to alter my hair’s outline, while excessive shedding may need a different solution.

Anyone pregnant, breastfeeding, managing a medical condition or taking regular medication should ask a pharmacist or GP before starting. Persistent or heavy shedding deserves a medical check in Australia; a GP can investigate issues such as iron deficiency or thyroid problems and refer me to a dermatologist when needed. A supplement should not delay that process.

If a hair growth supplement has caught your eye, check the full ingredient panel and AUST LABEL information first, choose one product, and take clear baseline photos before you begin. Use the label dose, keep your wash and styling routine steady, and give the experiment more than a single week. Judge the product by what you can document, not by the promise on the front of the tub.