5 Best L-Tyrosine Supplements of 2025 [Full Comparison]

I started taking  Momentous L-Tyrosine during a period when my workdays were stretching longer than usual and my brain felt like it was running on empty by mid-afternoon. Like many people juggling demanding mental workloads, I was looking for something to help me stay focused without relying on caffeine overload. That’s where this supplement came in—and to be honest, I’ve been genuinely impressed.

What I’ve noticed most is how L-tyrosine helps smooth out mental fatigue, especially during high-pressure days when I need to stay sharp and think clearly. It’s not a jolt of energy like you’d get from a stimulant, but more of a steadying effect—it’s like giving your brain a little extra buffer when you’re in stressful situations or you’re short on sleep.

A big reason I chose Momentous is that it's NSF Certified for Sport. This gives me peace of mind that what I’m taking is clean, safe, and effective, and there’s no risk of accidentally ingesting any contaminants or unlisted ingredients. If you’re someone who values clean, thoroughly tested supplements, this is a major plus.

The only downside? Momentous isn’t the cheapest L-tyrosine option out there. If price is your top concern, there are other products that might fit your budget better. But for me, the combination of purity, quality assurance, and noticeable cognitive support makes it worth the extra cost—especially when mental performance matters.

This product is best suited for anyone dealing with mental fatigue, intense study sessions, demanding workdays, or performance-focused training, where staying sharp under pressure really counts. I know it’s also popular with some people looking for natural ways to improve ADHD symptoms.

If you’re looking for a high-quality, reliable L-tyrosine supplement that can help you stay mentally dialed in, take a closer look at Momentous L-Tyrosine.

Key Things to Know About This Product

• Third-Party Tested: No

• Money-Back Guarantee: Yes

• Gluten Free: Yes

• GMO Free: Yes

Product Details:

• Price: $15.99

• Number of Servings: 120

• Amount of L-tyrosine per serving: 500 mg

• Serving Size: 1 capsule

• Subscription Discount: No

• Free shipping: Yes - on orders $50+

Pros:

• Price

• Easy to swallow capsules

• No aftertaste

Cons:

• No third-party testing or certification

If you’re looking for a cost-effective way to enhance focus and manage stress then NOW L-Tyrosine could be a great option. With 500 milligrams of L-tyrosine per serving, it provides the same dose as the Momentous product for a lower cost. At $15.99 for 120 servings, it offers great value for money and is one of the most competitively priced L-tyrosine supplements on the market.

Customers report experiencing enhanced focus, better mood, and greater capacity for tolerating stress after consistent long-term usage. The capsules are easy to swallow and don't have any unpleasant aftertaste, which is a plus.

However, it's important to note that NOW L-Tyrosine lacks third-party testing or certification, such as NSF certification. If having a supplement that's certified for purity and free from contaminants is a top priority for you, this might be a consideration.

Overall, NOW L-Tyrosine 500 mg offers a budget-friendly option for those seeking cognitive support and stress management. While it may not have the third-party certifications some other brands boast, its effectiveness and affordability make it a worthwhile choice for many.

Key Things to Know About This Product

• Third-Party Tested: No

• Money-Back Guarantee: Yes

• Gluten Free: Yes

• GMO Free: Yes

Product Details:

• Price: $26

• Number of Servings: 90

• Amount of L-tyrosine per serving: 500 mg

• Serving Size:  2 capsules

• Subscription Discount: Yes - save 20%

• Free shipping: Yes

Pros:

• Easy to swallow capsules

• No aftertaste

• Highly rated by customers

Cons:

• Soon to be discontinued

• No third-party testing or certification

Thorne’s Thyrocsin features 500 milligrams of L-tyrosine per one-capsule serving and is popular with customers for its ability to help with improving mood, mental alertness, and motivation while also helping to combat stress, anxiety, and depression.

Priced at $26 for 90 servings, it’s not as cost effective as NOW’s L-Tyrosine but is cheaper than the Momentous product. However, it lacks the NSF Certified for Sport certification that the Momentous L-Tyrosine carries. It is also soon to be discontinued by Thorne. 

Key Things to Know About This Product

• Third-Party Tested: Yes - Certified Gluten Free

• Money-Back Guarantee: Yes

• Gluten Free: Yes

• GMO Free: Yes

Product Details:

• Price: $32

• Number of Servings: 90

• Amount of L-tyrosine per serving: 500 mg

• Serving Size: 1 capsule

• Subscription Discount: Yes - save 10%

• Free shipping: Yes - on all orders

Pros:

• Certified gluten free

• Free shipping

• Highly rated and reviewed by customers

Cons:

• Price

Pure Encapsulations L-Tyrosine is highly rated and reviewed by customers who report it helping with mood, anxiety, and depression, as well as helping to support thyroid hormones and hyperthyroidism. Many customers report noticing a subtle but steady improvement in mental focus, particularly during high-stress days or after poor sleep.

Pure Encapsulations is a brand well known for its clean ingredients and transparency, and this product is certified gluten free and free from allergens and additives. That said, there’s no further third-party testing such as NSF Certified for Sport, even though—at $32 for 90 servings—the product is one of the most expensive L-Tyrosine supplements on the market.

The capsules are easy to take, with no aftertaste, and with one capsule delivering 500 milligrams of L-Tyrosine it’s simple and effective.

If you're looking for a well-reviewed, trustworthy L-tyrosine supplement that supports cognitive function with clean ingredients, Pure Encapsulations is worth checking out.

Key Things to Know About This Product

• Third-Party Tested: Yes - certified GMP facilities

• Money-Back Guarantee: Yes

• Gluten Free: Yes

• GMO Free: Yes

Product Details:

• Price: $45

• Number of Servings: 150 

• Amount of L-tyrosine per serving: 1000 mg

• Serving Size: 1 capsule

• Subscription Discount: No

• Free shipping: No

Pros:

• Higher dosage

• Manufactured in certified GMP facilities

Cons:

• Price

• No NSF certification

Alpha Flow High Potency L-Tyrosine is one of the few L-Tyrosine products on the market offering a higher dose of 1000 milligrams per serving. It is also GMO free, gluten free, and made without artificial fillers or preservatives. It's manufactured in certified GMP (Good Manufacturing Practices) facilities in the U.S., which provides peace of mind about ingredients. That said, it lacks the further certification, such as NSF Certified for Sport, that the Momentous product has.

At $45 for 150 servings, it has a comparable price per serving to Momentous and Thorne, so those looking for a more budget-friendly option might prefer NOW’s L-Tyrosine. It does boast double the dosage per capsule, though, making it a great option for anyone looking for high doses and potency.