A stomach ache is one of the most annoying and debilitating things in life, especially when traveling. I've been stranded with an upset stomach in every place you wouldn't want to be: deep water soloing on a remote island in the Andaman Sea, on an overnight train through southern Thailand, and on the tenth pitch of a sport climb in El Potrero Chico, Mexico.

On my recent trip to the Indian Himalayas, I was prepared with a massive kit of stomach soothers from Tums to charcoal tablets to grapefruit seed extract. The most enjoyable and effective was a daily dose of Good Belly ToGo probiotics. Each individually wrapped package contains 20 billion probiotic cultures and 500 mg of Vitamin C that supports your digestive tract and improves your immune system by displacing harmful bacteria with an extra boost of live and active cultures. Made of the highest quality all natural and organic ingredients, Good Belly is also vegan and free of gluten, dairy and wheat. Bonus: the sweet mango and tangy blueberry acai flavors will mask any funky tasting water. Either add the powder to 4-6 ounces of water or shoot like a pack of Pop Rocks and never leave home without it.