Once you have a feel for the Nutrafol range, the next step is seeing what else lives on the scalp shelf. Serums are the easiest category to compare, because you apply them the same way: a few drops on a clean, dry scalp, parted into the hair, and then you leave them alone.

Nioxin's Hair Fall Defense Serum is the one I would reach for if you already like that brand's shampoos and want a matching leave-in step. Act+Acre's 2% Stem Cell Scalp Serum is the more skincare-minded option, and the name tells you the idea: treat the scalp like skin. Nécessaire's The Scalp Serum with 5% Capixyl follows a similar logic, with the active written right into the title, which I appreciate.

Living Proof's Scalp Care Density Serum is made for the look of density, and it is the one I would test if you dislike anything greasy at the roots. The Ordinary's Multi-Peptide Serum for Hair Density is the plainest of the first five, a clear bottle with a clear job, and it suits someone who likes reading a label before buying anything.

A practical test that I trust: pick one serum, use it on the same days each week, and take a photo of your hairline and crown in the same bathroom light every month. Your memory is a poor judge of slow change, and a photo is not. Nothing here is a promise of thicker hair. These are scalp products, and the useful test is if you will actually use one regularly.

The shower is the quiet place where this routine either sticks or does not. A thickening shampoo is a cosmetic job: it coats and lifts the strand so hair looks and feels fuller. That is a real, visible effect, and it is a different thing from anything a supplement does.

Kérastase's Genesis Homme Thickening Shampoo for Men is the most polished of the group, with the salon-shelf feel and a formula made for men's hair that looks thinner. Jack Black's True Volume Thickening Shampoo is a friendly everyday pick, easy to lather and easy to live with. Dr. Groot's Hair Thickening Shampoo for Thinning Hair is made specifically for that concern and fits neatly into a longer scalp routine.

Every Man Jack's Men's Premium Thickening Shampoo in Redwood is the one for guys who want a woodsy scent and a no-fuss bottle. hims' Thick Fix Thickening Conditioner is the conditioning half of that idea, and it pairs naturally with any of the shampoos above. Nioxin's Scalp + Hair Thickening System 2 Shampoo is the one I would look at if your hair is already noticeably fine and you want something designed as part of a system.

What I would skip: switching shampoos every few weeks. Thickening formulas need a month or two of steady use before you can judge how your hair looks and feels, and constant swapping hides the answer. Also skip piling a heavy conditioner onto the roots, since that undoes the lift you are shopping for. Keep it on the lengths and ends.

Here is the plain line I would want a friend to hear. It is worth asking a doctor before starting any supplement, especially if you take medication, and hair loss that worries you is a job for a dermatologist, not a shopping cart.

The American Academy of Dermatology says male pattern hair loss is the most common cause of hair loss in men, and that a dermatologist can tell you which type you have. It also notes that by age 50 more than half of white men show visible signs of it. So if you are noticing changes, you are in very common company.

Once you have that conversation, build slowly. Choose one product, use it as the label directs, and give it the full window the brand describes before deciding anything. Take your monthly photo. Add a second product only when the first has become a habit.

The best routine here is a boring one: the same few steps, in the same order, for months. That is how Nutrafol Men is meant to be used, and it is how I would approach everything else on this page.

After the doctor, the supplement and the monthly photo, the rest of your routine is just the shower and a few small products, so here are more to compare. Sachajuan Scalp Shampoo, Virtue Scalp Remedy and Oribe Serene Scalp Oil Control are the ones I would look at if your scalp is the thing you think about. For hair that looks flat, Molton Brown Thickening Shampoo with Ginger Extract, R and Co Dallas Biotin Thickening and Sisley Paris Hair Rituel Densifying are the ones to compare. Leave-on options include TAB Tech Activated Hair & Scalp Serum, Barberino's Super Energizing Hair Serum and Virtue Overnight Scalp & Hair Elixir. The Jack Black Double-Header keeps the shower simple. What I would skip: a dry shampoo on a day when you can just wash. If you want to keep browsing, I also put together Better Not Younger, Hair Care Built for Thinning Hair and Sun Bum Sunscreen, After Sun and Beach Hair Picks.