Trying to keep that pep in your step but the world keeps grinding you down? You're in good company. Approximately 45% of folks in the good old USA are battling fatigue, making energy supplements the new Avengers - sworn superheroes in our war against weariness. So, strap in, we're about to dive deep into the truths and illusions of these caped crusaders.

Iron: This stuff is essential for transporting oxygen throughout your body. Crossfit is a struggle when your muscles have the oxygen levels of a fishtank. For most of us, the average steak gives us plenty of this. Supplementation pops up when you're anemic - your iron levels are pitiful, and you need reinforcements. Unfortunately, the downside of these supplements includes some gastrointestinal grief such as nausea, diarrhea, or constipation.

Protein: Think of it as the building block for muscles and bones, and a superb backing vocalist to your nervous system. Athletes gulp down proteins like there's no tomorrow to meet their energy hunger. But hitting protein from supplements? Let's say, it's a debatable territory.

Vitamin B12 (Cobalamin): This friendly fellow is the life of the cell party, responsible for DNA production and energy generation. Sadly, B12 flirtation with daily vitamin excess may cause hip fractures and even increase the risk of lung cancer.

Creatine: Hit the gym, and you won't stop hearing about this. It helps muscle cells to produce more energy, and some reports suggest that it could enhance mental agility. But tread with care, the research on long-term benefits is as dubious as your Uncle Larry's weight loss claims.

Tyrosine: The dark horse of amino acid, this one is known to fight fatigue like your grandma fights the urge to spoil her grandchildren. Some may find it beneficial for the brain functions, especially during stressful conditions.

Selenium: This tiny nutrient comes packed in meats and fish and might bless your laggy body with a refreshing oomph if your fatigue is related to a thyroid condition.

Confused about energy enhancement supplements? You're not alone. The solution is sheer Sherlock Holmes-style investigation - inspect, dissect, and consult professionals. Because energy is a precious resource, and we ain't allowing quick fixes to zonk it away!