However, while some caffeine-free pre-workouts simply contain the same ingredients as a caffeinated pre-workout – just without the caffeine – others add in extra vitamins and minerals as well as increasing the dosage of some ingredients to make up for the lack of stimulant. It’s for this reason that looking at the ingredients list of a pre-workout before you buy is important.

Makwana suggests keeping an eye out for the following ingredients:

Beta-alanine: “This is an amino acid that can help delay muscle fatigue, allowing for longer, more intense workouts.”
Creatine: “Creatine is another amino acid that can provide muscles with rapid energy, improving power and strength during high-intensity workouts.”
Amino acids: “Various amino acids such as BCAAs (branched-chain amino acids like leucine, isoleucine, and valine) are used to fuel workouts and aid in recovery.”
Nitric oxide boosters: “Ingredients like L-citrulline and arginine are used to enhance blood flow to the muscles, which can increase nutrient delivery and improve muscle pumps.”
Taurine: “Taurine is known for its potential to help with muscle endurance and strength.”
Betaine: “Betaine may help to improve physical performance and muscle endurance.”

Caffeine-free pre-workouts: can stimulant-free exercise supplements boost energy?