Acne guides
What's behind your breakouts, and how to find out.
Inflammatory Acne and hsCRP: What an Inflammation Marker Shows
hsCRP measures low-grade inflammation anywhere in the body, not just your skin. Here is what the research says about hsCRP and acne, what a high result means, and why one reading needs context.
Perimenopause Acne: Why Breakouts Start (or Return) in Your 40s
Falling estrogen and dropping SHBG can tip the balance toward androgens in your 40s, bringing breakouts to the chin, jawline and around the mouth. Here is what drives perimenopause acne and when to get checked.
Do Dermatologists Do Blood Tests for Acne? What to Ask For
Most acne is diagnosed just by looking at your skin. Here's when dermatologists do order blood tests, which hormone tests are typically used, and how to ask your doctor about them.
Supplements That Can Cause Acne (and How to Tell Which One)
High-dose B12, whey protein, iodine, DHEA and anabolic steroids have all been linked to breakouts, while the evidence for biotin is weak. Here's how strong the evidence is for each, and how to figure out which one might be affecting your skin.
Acne in Your 30s or 40s When You Never Had It as a Teen
Adult acne is common in women, even without a teen history. Here's what research says about how often it happens, how it differs from teen acne and what drives it.
Acne After Stopping Birth Control: How Long It Lasts and Why
Stopping the pill lowers SHBG and lets androgen activity rebound, which can trigger breakouts. Here's what changes, what's known about how long it lasts, and when to get checked.
Low SHBG and Acne: Why Normal Testosterone Isn't the Full Story
SHBG decides how much of your testosterone is active. When it's low, normal testosterone can still behave like too much. Here's what the research shows and how to read the pattern.
Low Ferritin and Acne: What the Research Actually Shows
Low ferritin hasn't been proven to cause acne, but iron stores matter for skin repair and are easy to misread. Here's what the research shows and why testing beats guessing with supplements.
Normal Bloodwork but Still Have Acne? 5 Reasons Labs Miss the Cause
"Normal" bloodwork usually means the acne-related markers were never tested. Here are five reasons standard labs miss what is driving your breakouts, and what to ask for.
Can Vitamin B12 Cause Acne? What the Research Says
High-dose vitamin B12 can trigger sudden breakouts in some people. Here is what B12 acne looks like, why it happens, and how to tell if your supplements are the problem.
Chin and Jawline Acne: What Your Biology Is Telling You
Chin and Jawline Acne: What Your Biology Is Telling You Key Takeaways Chin and jawline acne is the most reliable external indicator of a hormonal imbalance — specifically elevated testosterone...
Blood Tests for Acne: The Labs That Matter and What They Show
There's no single acne blood test, but a few labs can show what's driving yours: hormones, blood sugar and metabolism, liver and kidney, and vitamin D. Here's what each marker shows and which ones are worth adding.