Shanna Swan, Ph.D.: “[Sperm count] is not just about having babies. It's about how healthy you’re going to be as you get older.”
Swan, an environmental and reproductive epidemiologist, joins mbg co-CEO, Jason Wachob, to discuss why sperm count is declining (and what it means for overall health), plus:
- Lifestyle factors that can affect fertility
- The best & worst foods for reproductive health
- How city dwellers can limit exposure to endocrine disruptors
- The connection between environmental chemicals & erectile dysfunction
- How to increase sperm count & enhance fertility

Referenced in the episode:
- Swan's book, Countdown.
- Swan's meta-analysis showing sperm count dropped 59% from 1973 to 2011.
- Swan's podcast episode on The Joe Rogan Experience.
- Environmental Working Group's consumer guides.
- A study showing prenatal exposure to phlathlates associated with decreased penile size.
- Defend Our Health website.
- A study showing male exposure to BPAs at work associated with sexual dysfunction.
- A 2015 study in Denmark showing smoking marijuana more than once a week associated with 29% lower sperm count.

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