Unlock Explosive Energy in 2025: The Iron Supplements Your Dietitian Swears By (And Most People Totally Miss)

Ever wondered why some iron supplements leave you feeling like you’ve swallowed a brick, while others glide down like a dream? After wading through a sea of options that promise the moon but often deliver tummy troubles, I finally found the Thorne Iron Bisglycinate—a supplement that genuinely ticks all the right boxes. It’s not just about packing a punch of iron; it’s about a gentle, well-crafted formula that respects your gut, your diet, and your busy lifestyle. With 25 milligrams of one of the most bioavailable forms of iron, this little capsule outshines the usual suspects, boasting science-backed tolerability that means fewer aches and complaints. And here’s the kicker—it’s NSF Certified for Sport, so athletes can trust it’s clean and credible, no nasty surprises lurking in the ingredient list. At just a quarter per serving, it offers real bang for your buck without cutting corners on quality or safety. So, if you’re on a mission to boost your energy and keep your iron levels in check without the drama, this one’s definitely a standout contender. LEARN MORE

After evaluating dozens of options, the Thorne Iron Bisglycinate is the best iron supplement I’d confidently recommend to most. It meets all the key criteria I look for: a form well-tolerated by many, high-quality ingredients, and third-party testing.

Each capsule delivers 25 milligrams of ferrochel ferrous bisglycinate chelate, which is one of the most bioavailable and gentler forms of iron. A 2023 systematic review and meta-analysis by Nutrition Review suggests it outperforms conventional options like ferrous sulfate (another form of iron), especially in terms of tolerability, meaning less risk of common side effects such as constipation, nausea, or digestive discomfort. The capsule uses hypromellose for controlled release, which may improve absorption throughout the day.

The formula is free from animal products, gluten, soy, dairy, and artificial additives, making it a strong fit for a variety of dietary needs. That said, while some of Thorne’s products are vegan-certified, this one isn’t—an important detail for anyone following a strict plant-based lifestyle.

My favorite perk? It’s NSF Certified for Sport, a rigorous certification that screens for over 200 banned substances. This gives the product solid credibility for athletes and fitness professionals. Thorne also manufactures in facilities that meet strict global standards, including oversight from Australia’s Therapeutic Goods Administration—a detail I always appreciate when reviewing supplements.

Plus, at $0.25 per serving, it’s reasonably priced for the level of quality, especially considering the certified sourcing and formulation. Whether you’re addressing iron deficiency or simply aiming to support energy and endurance, this supplement offers a dependable balance of effectiveness and peace of mind, making it a standout choice among many strong contenders.

Read more: Best Supplements