So you thought you were safe from wrinkles because you wear sunscreen? Yeah, not so much. Wrinkles arise from a variety of causes, not the least of which is, you guessed it, stress.

Get this. A 2001 study conducted at the University of California, San Francisco revealed that when cells are exposed to chronic stress they age more quickly. And, of course, cellular aging is what makes skin less elastic and supple thus leading to premature sagging and wrinkling.

"When you're stressed your brain releases neuro peptides -- they're free radicals that can damage your cell membranes," says Dr. Murad, drawing the comparison between our skin cells and a grape's skin. "If you put pin pricks into the grape's skin, the water will seep out. Those radicals are essentially the pricks to our skin -- once they're released, they damage the cell membranes so that they lose water."

This water loss or dehydration leads to "fine lines and wrinkles, a sallow tone and maybe even some dark circles around your eyes because it also affects circulation."

Hydration is so important that at Murad's flagship medical spa in El Segundo, Calif. they offer an "intracellular water test" to determine levels of moisture deep within the skin. From there, a personalized plan to increase a cell's ability to hold water is formulated.

Next: How to manage wrinkles

In his book, "Wrinkle-Free Forever: The 5-Minute 5-Week Dermatologist's Program", Dr. Murad explains "which ingredients help you attract and hold water in your skin and [which] supplements boost hydration and prevent water loss." Note-worthy supplements were glucosamine and antioxidants.

One sure way to help counter tension-induced wrinkles, as well as all other stress-related side effects, is to adopt a stress management program. Exercise (Pilates has been shown to be almost as effective as yoga in combating stress), eat well, and get plenty of sleep. May sound low-tech, but it's been proven to work.

Next: The havoc stress is wreaking on your hair.

When you're stressed out you may feel like "pulling your hair out," but did you ever realize that it can actually cause your hair to fall out?

It's true. "Stress can lead to extra hair [falling out] but it can take a while to manifest," says Kingsley. In fact, "telogen effluvium" is a common hair loss problem that can occur up to three months after a stressful event.

The tricky part is that little can be done to help the situation. "[The hair loss] cannot be curtailed but needs to run its course," says Kingsley who's the first to note that it's a vicious cycle of sorts.

"It's easy to say 'don't be stressed' but this is more difficult than it sounds and the more you worry about [losing your hair], the more stressed you get and the more [that] falls out." The good news is that after the initial loss, hair usually grows back in six to nine months.

But is there NOTHING we can do in the meantime?

Next: What you can do to help keep hair on your head.

Kingsley advises getting more sleep and taking vitamin B supplements -- both are indicated to help keep hair follicles from "releasing the hairs prematurely." He also recommends the "use of a scalp mask that's massaged into the scalp every two to three days before shampooing." Try Philip Kingsley Scalp Mask, $6.82.

Next: Can stress really make your hair gray?

OK, it causes acne and wrinkles and makes your hair fall out, but stress can't really cause gray hair too, can it?

One word. Kinda.

According to Kingsley, "It does appear that stress can cause hair to turn gray faster, although it hasn't been definitively proven. Stress can cause the B vitamins to become depleted, which is associated with being gray," he says.

Next: Is there any way to stave off the graying process?