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L-Tyrosine, 500 mg capsules
Part Number: LU0003
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ACHIEVE is a nootropic formula for brain health containing 500 mg of L-Tyrosine that will increase alertness, help you stay focused, and improve memory.

L-Tyrosine improves memory and cognition under acute stress.  It helps improve decision-making, ‘flow state’ and creativity, cognitive flexibility, and working memory.  L-Tyrosine is a great addition to any nootropic stack, especially if you’re dealing with ADHD or ADD.
L-Tyrosine supports healthy glandular function and stress response because it helps with the synthesis of thyroid hormone and epinephrine (adrenalin).
Studies have found tyrosine to be useful for cold, fatigue, prolonged work, stress, sleep deprivation, and those suffering with hypothyroidism. 
The typical dose for L-Tyrosine is 300 – 500 mg twice per day. This dose can be taken all at once, or dosed throughout the day. 
L-Tyrosine is isolated and derived from foods such as meat, fish, eggs, dairy products, beans, nuts, oats, soy and wheat.

NALT v. L-Tyrosine
N-acetyl-tyrosine is more water-soluble than L-tyrosine and thus more suitable for parenteral (intravenous) nutrition for people who can’t eat and drink.

The body supposedly also uses it better from supplementation than L-tyrosine, but the evidence doesn’t fully support these claims. We partly metabolize NALT into free tyrosine but eliminate 35-38% of unchanged substance with the urine.

In a study, NALT didn’t increase tyrosine levels at all. The authors suggested tyrosine linked to other amino acids (alanine or glycine) as preferred options for parenteral nutrition.

All studies used injected NALT, and there’s no available data on the metabolism and efficacy of oral supplements.

However, acetylation of amino acids is a well-known and powerful tool for boosting their brain uptake and stability, which often unlocks new health benefits. N-acetyl-cysteine (NAC) and acetyl-DL-leucine both have beneficial effects on the brain and mental health.

Future research should investigate the potential advantages of the acetylated form of L-tyrosine.

L-tyrosine remains a better choice for oral supplementation in light of the available evidence, but the future may hold more promise for NALT.

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