Caffeine is a psychoactive drug because it changes brain function and results in alterations in perception, mood, or consciousness. Caffeine is a central nervous system stimulant found naturally in the seeds, nuts, and leaves of over 60 species of plants. This stimulant is commonly in coffee, tea, and energy drinks and is the most widely consumed drug in the world. Caffeine is one of the first things to be cautious about after seeing a positive pregnancy test. Trying to figure out how much caffeine is safe during pregnancy and breastfeeding can be challenging. This episode examines how you process caffeine and the recommendations and research on the safety of caffeine during pregnancy and breastfeeding.     Thank you to our sponsors   20% off Mommy Steps and Form insoles with the promo code FEET. Studies show pregnancy can make your feet grow. In one study, 61% of participants had a measurable increase in foot length, and 22% reported going up a shoe size. The thought of going up a shoe size and having to replace every pair of shoes you own might freak you out. The good news is that wearing insoles can protect your feet from going up in size.   Try AG1 and get a FREE 1-year supply of immune-supporting Vitamin D AND 5 FREE AG1 travel packs with your first purchase. Each serving of AG1 delivers your daily dose of vitamins, minerals, pre- and probiotics, and more. It’s a powerful, healthy habit that’s also powerfully simple.  (As a friendly reminder, pregnant or nursing women should seek professional medical advice before taking this or any other dietary supplement.)     Read the full article and resources that accompany this episode.     Join Pregnancy Podcast Premium to access the entire back catalog, listen to all episodes ad-free, get a copy of the Your Birth Plan Book, and more.     Check out the 40 Weeks podcast to learn how your baby grows each week and what is happening in your body. Plus, get a heads up on what to expect at your prenatal appointments and a tip for dads and partners.     For more evidence-based information, visit the Pregnancy Podcast website.