If the words "aromatherapy " or "essential oils" evoke images of hippies dipped in fragrant oils surrounded by burning incense in the pursuit of inner peace and zen, then you're not alone.

But to get a more accurate definition of the mystifying practice, we turned to Guy Vincent, an aromatherapy expert and the head perfumer at Aveda . In a nutshell, aromatherapy is "the use of concentrated plant-derived aromatic oils for health and wellbeing," Vincent told The Huffington Post.

By simply smelling various essential oils (or a combination of them), our brains become stimulated and depending on the particular healing powers of the aromatic compound, we can experience a range emotions -- from calm to energized. These natural mood modifiers are what have inspired so many to not only try aromatherapy, but to use it on a regular basis .

Vincent, who says he's "not a great sleeper," has found that a nightly routine of stretching, yoga and using the calming effects of lavender oil help him relax and eventually head to dreamland. He also mixes sprays made with grapefruit and vetiver oil to create a "welcoming and joyous" atmosphere in his home.

But harnessing the power of aromatherapy goes beyond mood or room-modifying oils, sprays and candles -- there are also beautifying benefits. For example, lavender not only helps to relieve stress but its antiseptic and antibacterial properties also fight mild acne . And rosemary oil will give a boost of energy as well as add volume and silky-ness to your hair .

For optimal effectiveness, many essential oils can be applied directly to the skin or dabbed on the wrist, back of the neck and temples. And adding drops of the pure oils to your favorite beauty products is yet another brilliant use.

There are some serious upsides to sprinkling a bit of essential oil here and there, so we asked Vincent to tell us about some of the most popular aromatherapy oils and how they can help us improve our moods, minds and bodies. Check em' out below!

Lavender

Scent: Herbal and floral

Mood/mind effect: Calming to the mind and restorative in times of stress

Beauty effect: Antiseptic acne treatment, natural hair growth agent

To buy: Yardley London English Lavender soap , $10; Kiehls Lavender Foaming-Relaxing Bath , $30; Orglamix pure lavender essential oil , $21

Vetiver (root oil)

Scent: Robust, woody and earthy

Mood/mind effect: Grounding, supporting and centering

Beauty effect: Moisturizing, skin toning, fades and removes scars

To buy: Edens Garden pure vetiver therapeutic essential oil , $11; Malin+Goetz vetiver candle , $52; Forest Essentials sandalwood and vetiver hair cleanser , $12

Geranium

Scent: Fresh and leafy

Mood/mind effect: Balances out emotions and moods -- used when extremes need to be brought back to the center

Beauty effect: Wrinkle reducer, improves dental health and acne treatment

To buy: Aesop geranium leaf body balm , $35; Mrs. Meyer's geranium soy candle , $13.50; Young Living geranium essential oil , $25

Rosemary

Scent: Woody and evergreen

Mood/mind effect: Stimulating and refreshing

Beauty effect: Hair volumizer and shine agent, facial astringent, skin moisturizer

To buy: Avalon Organics volumizing rosemary shampoo , $10; Aveda rosemary mint hand relief cream , $24; NOW Foods rosemary essential oil , $15

Peppermint

Scent: Strong and minty

Mood/mind effect: Invigorating and empowering

Beauty effect: Anti-fungal nail treatment, blemish spot treatment, moisturizer

To buy: Heritage Store peppermint essential oil , $9; Lush Cosmetics "Pink Peppermint" foot cream , $26; Burt's Bees beeswax lip balm , $3.30

Ylang Ylang

Scent: Exotic, romantic and floral

Mood/mind effect: Balancing and seductive

Beauty effect: Skin toner, acne treatment and natural hair growth remedy

To buy: Herbivore Botanicals ylang ylang and vanilla dead sea salts , $18; Molton Brown ylang ylang candle , $74; Young Living ylang ylang essential oil , $56

Jasmine

Scent: Sensual and sweet

Mood/mind effect: Antidepressant, calming and aphrodisiac

Beauty effect: Antiseptic and helps fades scar marks

To buy: Aerin "Ikat Jasmine" perfume , $110; Edens Garden jasmine essential oil , $50; Diptyque jasmine candle , $32

Rose

Scent: Warm, sweet and delicate

Mood/mind effect: Restorative, boosts confidence and aphrodisiac

Beauty effect: Anti-aging, anti-inflammatory and strengthens hair roots

To buy: Weleda wild rose body oil , $26; Best Therapeutic rose essential oil , $20; Pacifica P ersian rose reed diffuser , $16

Bergamot

Scent: Spicy, sweet and citrusy

Mood/mind effect: Cleansing and refreshing

Beauty effect: Antiseptic properties, natural deodorant, skin toner

To buy: Naturopathica Sicillian bergamot body lotion , $28; Dolce & Gabbana "Velvet Bergamot" perfume , $225; Aveda bergamot essential oil , $17

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