Feel Good Podcast with Kimberly Snyder Why Research Shows Collagen Supplements Don’t Work…and What Does with Dr Amy Killen
Dec 22, 2025
Dr. Amy Killen, a regenerative and longevity physician, dives into the latest in wellness technologies. She demystifies collagen supplements, linking skin health to diet, sleep, and lifestyle choices. Hormone replacement therapy takes center stage, with insights on ovarian health and testosterone's role in women. Dr. Killen emphasizes the impact of sugar and caffeine on overall health and encourages making informed decisions for lasting well-being. Listeners walk away empowered to enhance both inner health and outer beauty!
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Collagen Evidence Is Conflicted
- Recent reviews show collagen studies with positive skin results were mostly industry-funded and lose effect when those are removed.
- Dr. Amy Killen now questions collagen's effectiveness for skin though it may help joints.
Prioritize Sun Protection And Retinoids
- Use daily mineral sunscreen and hats to protect skin from UV-driven aging and collagen loss.
- Apply topical retinoids and use antioxidants like vitamin C and astaxanthin for proven skin benefits.
Estrogen Loss Dramatically Lowers Collagen
- Menopause causes a systemic 30% drop in collagen because estrogen maintains skin collagen.
- Replacing estrogen around late perimenopause can preserve skin elasticity and structure.