The density. The thickness.

It's what a beard is supposed to be!

Not this.

This is my beard, if you even want to call it a beard.

This footage was taken after I let it grow for two weeks.

Two weeks!

It's thin, patchy,

and in some spots there's no hair at all.

Sad.

But let's look at this one again.

This is Kevin.

We're around the same age,

both Caucasian males of Irish descent.

You could say we have a lot in common,

except in the facial hair department.

So, I asked a dermatologist

about why he's able to grow a beard and I'm not.

Dr. Chwalek: It's based on genetics as well as hormones.

Some men, you know, have more hair follicles,

so they can grow denser, coarser beards than others.

Testosterone gets converted in the hair follicle

to a more potent form called dihydrotestosterone.

Some hair follicles have receptors

on them that are very sensitive

to this higher form of testosterone, dihydrotestosterone,

and that will stimulate hair growth.

Graham: How would you characterize my facial hair?

Dr. Chwalek: I'd say it's like, sparse,

and you have light-colored hair,

so it doesn't show up quite as much.

Graham: I can't really grow a great beard.

It's been a problem.

I want one. I wanna look like my colleague, Kevin.

I mean, look at that beard.

It is just glorious.

Why can't I grow a beard like Kevin?

Dr. Chwalek: Well, Kevin has some good hair genes,

so because of that, the hair follicles

on his face are more sensitive

to the effects of a form of testosterone

called dihydrotestosterone which can help

to stimulate thicker, coarser, longer hair growth

in some areas of the body like the beard area.

Narrator: Beards and facial hair

have long been associated with masculinity and virility.

I began to wonder if my inability

to grow thick facial hair like Kevin

makes me less of a man.

Graham: Does the fact that I can't grow a beard,

does it make mean that I have low testosterone?

Dr. Chwalek: No. Men who can't grow a beard

or have patchy beards

usually have normal testosterone levels.

It isn't a reflection of having low testosterone

or being deficient in testosterone.

Graham: So, you can still be virile -

Dr. Chwalek: Right.

Graham: And grow a crappy beard like this?

Dr. Chwalek: Yes.

Graham: Okay, good.

Narrator: And in fact, there are some ways

to increase the chances of growing facial hair,

but shaving more often isn't one of them.

Dr. Chwalek: So, the idea that shaving

can impact hair growth is actually a myth.

When you're shaving, you're just cutting the hair off

at the surface of the skin,

and what's controlling the hair growth

is really occurring deeper in the skin.

So, it shouldn't have any impact

on how quickly the hair grows, or how dense the hair grows.

People have tried topical Rogaine or Minoxidil.

These things may stimulate a little hair growth,

but assuming it's due to genetics,

then you're kind of stuck with what you have.

Graham: It's all about the sensitivity of the hair follicles

and how they interact with this -

Dr. Chwalek: Dihydrotestosterone or androgens in the blood.

Graham: So, you're saying that,

that his hair follicles are "sensitive."

Dr. Chwalek: Yes.

Graham: See, mine aren't.

Dr. Chwalek: Right.

Graham: They aren't sensitive. They're like rocks.

They have no sensitivity at all.

Okay, so I win that!

Dr. Chwalek: Right.