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What's In Your Sunscreen, Part3: Are Sunscreens Endocrine Disruptors?
Introduction In a 2020 FDA-backed trial, six widely used sunscreen active ingredients— avobenzone, oxybenzone, octocrylene, homosalate,...

Ryan M. Trowbridge, MD, MS, MA
Apr 614 min read
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Isotretinoin ("Accutane") Dosing Options: Should You Go Low, Standard, or High?
With low-dose regimens becoming popular, what dose of isotretinoin ("Accutane") is right for you?

Ryan M. Trowbridge, MD, MS, MA
Apr 24 min read
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What's in Your Sunscreen, Part 2: Major Sunscreen Ingredients, FDA Approved or Toxic Substances?
Sunscreen has long been a cornerstone of public health recommendations for preventing sunburn, premature skin aging, and skin cancer. In...

Ryan M. Trowbridge, MD, MS, MA
Mar 294 min read
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What’s in Your Sunscreen, Part 1: The Most Common UV Filters
As spring approaches and you start stocking up on sunscreen, you're likely to encounter a familiar lineup of ingredients on the back of...

Ryan M. Trowbridge, MD, MS, MA
Mar 295 min read
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Why Minnesota Burns: Melanoma Risk Beyond Latitude
Latitude isn't destiny, but sunburns and excessive sun exposure could be.

Ryan M. Trowbridge, MD, MS, MA
Mar 233 min read
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What's in Sunlight (and Why Do We Care)?
Understanding the impact of UV light on skin at different times of the year and locations can help you enjoy life and consume sun safely.

Ryan M. Trowbridge, MD, MS, MA
Mar 197 min read
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Does EMOTIONAL Stress Cause Hair Loss?
Hair loss can be a deeply distressing experience, often leading to significant emotional strain. But can emotional stress itself...

Ryan M. Trowbridge, MD, MS, MA
Mar 96 min read
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NUTRAFOL® Women: Does it REALLY work?
This is an unpaid, independent review. I have no vested interest in promoting this product other than providing people with accurate...

Ryan M. Trowbridge, MD, MS, MA
Mar 98 min read
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Risks of Topical Tretinoin Use During Pregnancy and Breastfeeding
"the key safety message is that the absence of evidence of harm is not absolute proof of safety"

Ryan M. Trowbridge, MD, MS, MA
Mar 58 min read
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Will Tretinoin Reduce the Size of My Pores?
What causes large facial pores? Unfortunately, there is no one single thing that contributes to pore size. It is a mix of multiple and...

Ryan M. Trowbridge, MD, MS, MA
Mar 25 min read
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Myth: Tretinoin Reduces Oily Skin
If you have oily skin and were counting on tretinoin to help , you may likely be disappointed. Although tretinoin has been shown to have...

Ryan M. Trowbridge, MD, MS, MA
Mar 14 min read
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Tretinoin: What is it?
If you’ve ever wondered about the connection between tretinoin, vitamin A, and retinol, you’re in the right place. In this post, we...

Ryan M. Trowbridge, MD, MS, MA
Feb 233 min read
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Tretinoin: Does It Really Cause Sun Sensitivity?
Anyone who has used tretinoin before remembers the instructions: apply a pea-sized amount at night. It’s true, tretinoin should be...

Ryan M. Trowbridge, MD, MS, MA
Feb 224 min read
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Myth: You Need to Apply Tretinoin Every Night
Research suggests that you don’t need to apply retinoids every night to reap their full benefits.

Ryan M. Trowbridge, MD, MS, MA
Feb 173 min read
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Myth: Biotin is an effective hair growth supplement.
Biotin for Hair Growth: Miracle Supplement or Marketing Hype? Biotin has long been marketed as a go-to supplement for hair, skin, and...

Ryan M. Trowbridge, MD, MS, MA
Feb 175 min read
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Valentine's Myth: Chocolate Causes Acne
For decades, the idea that chocolate causes acne has been both debated and dismissed. (Fulton et al, 1969) Some swear that indulging in...

Ryan M. Trowbridge, MD, MS, MA
Feb 135 min read
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Myth: Popping pimples causes scarring.
Last time you had a breakout, you might have been tempted to pop that pimple, believing it will make it disappear faster. But does...

Ryan M. Trowbridge, MD, MS, MA
Feb 123 min read
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Myth: Daily washing causes hair loss.
Many people worry that washing their hair too often can cause hair loss. But is that really true? Let’s break it down. What Happens When...

Ryan M. Trowbridge, MD, MS, MA
Feb 104 min read
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