3 supplements a doctor takes for energy and to help him recover when he's sick

• Dr. Zalan Alam, a primary care physician, takes supplements every day.
• He takes supplements including zinc and lion's mane.
• Alam said choosing which supplements to take is "all about personalization."

Supplements are hot right now, with celebrities from Venus Williams and LeBron James to Arnold Schwarzenegger launching products into a global supplement market estimated to be worth $177.50 billion in 2023.