If You Exercise 5+ Times A Week — These Supplements Should Be In Your Stack

Author: Molly Knudsen, M.S., RDNMay 23, 2026Registered Dietitian Nutritionist By Molly Knudsen, M.S., RDNRegistered Dietitian Nutritionist Molly Knudsen, M.S., RDN is a Registered Dietician Nutritionist with a bachelor’s degree in nutrition from Texas Christian University and a master’s in nutrition interventions, communication, and behavior change from Tufts University. She lives in Newport Beach, California, and enjoys connecting people to the food they eat and how it influences health and wellbeing.Image by BONNINSTUDIO / StocksyMay 23, 2026If you’re exercising (think gym sessions, fitness classes, running, cycling, at-home workouts, or any type of structured movement), dialing in your daily nutrition is crucial for supporting that level of physical demand. When fuel or recovery needs aren’t fully met, it can show up as fatigue, stalled progress, or just feeling like your usual workouts take more out of you than they used to.

What can you do about it? Make sure your foundational habits are in place. This includes staying hydrated, prioritizing sleep, eating a well-balanced diet, and (yes) the right supplements. There are a lot of supplements out there boasting big claims that just don’t live up to the hype. But some supplements do. So, let’s dive into three options that absolutely can support your fitness goals.

As a shock to probably no one, creatine tops the list. It has been making headlines for the last several years now, and the press is much deserved. Creatine is considered the most studied supplement on the market, with decades of research showing that it helps people (men and women of every age) build more muscle and strength1 from their resistance training.*