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In this May 4, 2011 free audio episode: Everything you need to know about colostrum, is birth control healthy, why can pro athletes eat bad food, what is a parasite zapper, how to train for a 5K without losing muscle, what happens when you hit the wall in a marathon, why it's hard to sleep after a hard workout, how much vitamin A is too much, and should teenagers be eating flax.

Remember, if you have any trouble listening, downloading, or transferring to your mp3 player just e-mail ben@bengreenfieldfitness.com. And don't forget to leave the podcast a ranking in iTunes - it only takes 2 minutes of your time and helps grow our healthy community! Just click here to go to our iTunes page and leave feedback.

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Featured Topic: "Everything You Need to Know About The Link Between Performance, Fat Loss and Colostrum"

If you've been wondering: is colostrum healthy? what is colostrum? can colostrum help fat loss? can colostrum help performance?, then this interview is for you. In this featured topic, I interview Joe Stout, a food scientist from Mt. Capra nutrition who was interviewed in Ben Greenfield Fitness Podcast #16 (digestive enzymes & probiotics) and Podcast #32 (goat’s milk vs. cow’s milk). Joe also traveled to Kona and interviewed me after Ironman World Championships in this video.

During our discussion, Joe answers the following questions:

-what is colostrum?

-how is it harvested and collected?

-traditionally, what are the benefits of colostrum?

-are there dangers in taking it?

-what is the link between colostrum and sports performance?

-what type of people would be finding a benefit of using colostrum?

If you're interested in incorporating colostrum into your diet for fat loss or performance, then click here to view my recommended brand: CapraColostrum.

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Listener Q&A:

====================================== [contact-form 3 "AskBen"] ======================================

Kalley asks: My question is in regards to birth control. I am 24 years old and have been on birth control pills since I was 18. In the last year or so I have taken a real interest in my health: changing my diet to be mostly real foods, working out with a personal trainer, and begun training for a half marathon. That said, I have become increasingly aware of the lack of (credible) information available surrounding birth control and the effects it may have on women's hormone levels, weight loss, and overall health. Estrogen seems to be linked to many health problems, so the increased amount being introduced into my system through daily birth control doses makes me nervous. (Especially considering we are also exposed in other forms in the environment). What are your thoughts on this topic? What kind of effects may taking birth control have? Should I be worried about this? Are there some forms of birth control that are better for overall health than others?

Amy asks: I was watching a video interview of Jenn Shelton recently and have been impressed by her ultramarathoning, as I am hoping to run an ultra in the next year or so. She briefly talks about her diet and basically says it isn't a good one, she loves Taco Bell & Mountain Dew. How can she run ultras as well as she does while fueling in a not-so-healthy manner? Stephen asks: A guy at work is telling me about Dr. Hulda Clark and her parasite zapper. He swears by it's effectiveness. Hocus Pocus or real medicine?? This might be an interesting topic for an upcoming podcast. I'd like to hear what you think.

glen asks: Hi Ben. First, thanks for your earlier advice on maintaining optimal T levels while I was prepping for my first BB show at the young age of 53. It was instrumental in winning the NPC Natural Ohio Over 50 Master's Championship on April 16th. Fast forward to today, after a 2 week major flu illness, I am back to training, but would like to add minimumal 5k mileage training to compete competitively in my age group this summer. Any suggestions on how to incorporate my mileage and pace training as not to burn up my lean mass. I am lifting 2days on, 1 day off, 2 days on per week. Presently, I am doing treadmill work for 2 miles at a moderate pace 3 days a week. Have competed in 5k's in years past and know I have to bump up my mileage and intensity, therefore need your expertise in accomplishing this in a intelligent manner.

Kyle asks: If I person has full glycogen stores at the start of a marathon, which is enough to run approximately 16-18 miles, why does so many online articles about the marathon say that running out of glycogen is the cause of "hitting the wall" when a runner is only getting about 70% of their fuel from glycogen, and other 30% or so from fat? Also take into account that they are likely fueling with some sort of CHO supplementation during the event. What I'm asking is, is there any physiological basis for fatigue occurring at mile 20?

James asks: Any suggestions on how to resolve why I consistently can't sleep on higher training volume days (any day I ride 50 or more miles or do a brick workout)?

Kathy asks: I had a question about how much Vitamin A and beta carotene to take in. My husband, who is 31, and I are both into cycling, and he's gearing up for his second season of triathlons. He smoked heavily from roughly 16 - 28. From what I have read, it seems that smokers or ex-smokers should avoid supplements with either Vitamin A or beta carotene. We eat a fairly healthy diet, and he eats a ton of fruit and probably two servings of vegetables a day. I considered trying the enerprime superfood you recommend, as we travel once a month or so, but was hesitant due to the extra beta carotene put in. What are your thoughts?

Craig asks: In the Q&A section of episode 139 you mentioned flax reducing the effect of estrogen. We secretly give our daugher, who just started puberty, ground flax for fiber. Anyway, should we be concerned with the effects of flax on her physical development? She doesn't get more than 2-3 tablespoons in the course of 24 hours.

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Remember, if you have any trouble listening, downloading, or transferring to your mp3 player just e-mail ben@bengreenfieldfitness.com And don't forget to leave the podcast a ranking in iTunes - it only takes 2 minutes of your time and helps grow our healthy community! Just click here to go to our iTunes page and leave feedback.

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Scroll down to donate anything over $15 to the show, and Ben will send you a BenGreenfieldFitness.com t-shirt...you can also conveniently donate any amount with your phone by simply clicking here.

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