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Put your health first in 2026 with free visits on all categories, and $200 off longevity testing.
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Longevity
Comprehensive health testing
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Test for 7 common STIs
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Psychological Erectile Dysfunction: Is It All in Your Head?
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Answers to Common Questions About Felix’s Weight Loss Program
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What Causes Rapid Weight Gain?
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Who is Eligible for Weight Loss Medications & How Can I Get a Prescription?
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Day one sale

Put your health first in 2026 with free visits on all categories, and $200 off longevity testing.

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Contact
We’re here for you
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Download Our App
Available on iOS and Android
About Us
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Support

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Help Center
FAQ

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BMI Calculator
Calorie Deficit Calculator
Blog

Further Reading

Psychological Erectile Dysfunction: Is It All in Your Head?
Learn more
Answers to Common Questions About Felix’s Weight Loss Program
Learn more
What Causes Rapid Weight Gain?
Learn more
Who is Eligible for Weight Loss Medications & How Can I Get a Prescription?
Learn more
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Back to all FAQs

How long does it take PrEP to work?

Protection for receptive anal sex begins seven days after taking daily PrEP. For the first week, please use barrier protection (like condoms). For vaginal sex or drug usage, please wait 21 days for maximum protection.

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