A Permanent Effect Electrolysis
Spa in Northbrook, IL
The business was founded by Marcy Shefler, who is one of the first electrologists the site credits with receiving a license to practice in Illinois. Agnes Kos started out working with her, later bought the practice and became its owner. The studio is located in Northbrook and draws clients from Evanston, Skokie, Glenview, Highland Park, Wilmette, Winnetka and Glencoe.
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The business was founded by Marcy Shefler, who is one of the first electrologists the site credits with receiving a license to practice in Illinois. Agnes Kos started out working with her, later bought the practice and became its owner. The studio is located in Northbrook and draws clients from Evanston, Skokie, Glenview, Highland Park, Wilmette, Winnetka and Glencoe.
Electrolysis sends a minute electrical current to the base of each hair follicle to destroy the tissue that produces hair. According to the FAQ, the method works on all skin and hair types. Sessions run from about 15 minutes to more than an hour depending on the area, and the number of visits varies by client, since deeper coarse hairs can need additional treatments. Slight redness can appear right after a session.
Before any treatment, clients can book a free consultation by phone or online. The electrologist talks through goals and background in a private conversation, then designs a treatment plan. Moles can be treated where state rules allow, though the electrologist may ask for written physician approval first. Infection control follows standards written by the American Electrology Association.
The FAQ contrasts electrolysis with laser-assisted hair removal, which it describes as a temporary method. The site notes that testimonials reflect real client experiences, and that results are not guaranteed and can differ from person to person.
Treatment plans are built around each client's goals, with the aim of reaching them in as little time as possible.
Specials & promotions
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Buy 1 electrolysis appointment, get 1 of the same value free
For new clients buying a 15, 30, or 60 minute appointment. Also applies to returning customers starting new areas.
On their website as of Oct 30, 2026 · Where we saw it
Meet the team
Team members listed on their website. Individual roles, credentials, and current employment have not been independently verified.apermanenteffect.com (opens in a new tab)
- Highlights
- Permanent electrolysis for facial and body hair
- Free consultation by phone or online before treatment
- Individual treatment plan after a private consultation
- Infection control follows American Electrology Association standards
- Eyebrow shaping and chin and upper lip treatment
- Treatment for clients with hormonal conditions that cause excess hair growth
- Good for
- Permanent hair removal
- Facial hair removal
- Clients with hormonal conditions that cause excess hair growth
- Clients who want a permanent method rather than laser
- Men and women
- Clients in Northbrook and surrounding North Shore suburbs
- Treats
- Unwanted facial hair
- Unwanted body hair
- Excess hair growth from hormonal conditions
- Eyebrow shaping
- Unwanted hair on the chin and upper lip
- Techniques
- Electrolysis
- Minute electrical current applied to the base of the follicle
- Permanent eyebrow shaping
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