Forms Comparison
| Form | Bioavailability | Best For |
|---|---|---|
| L-Tyrosine | High | Standard form — most studied; good absorption |
| N-Acetyl L-Tyrosine (NALT) | Low | More water-soluble but poorly converted to tyrosine — L-Tyrosine is preferred |
Types of L-Tyrosine: Forms & Bioavailability
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L-Tyrosine
Bioavailability: High. Best for: Standard form — most studied; good absorption.
N-Acetyl L-Tyrosine (NALT)
Bioavailability: Low. Best for: More water-soluble but poorly converted to tyrosine — L-Tyrosine is preferred.
References
- Mahoney CR, Castellani J, Kramer FM, et al. (2007). Tyrosine supplementation mitigates working memory decrements during cold exposure. Physiology & Behavior. DOI PubMed
- Jongkees BJ, Hommel B, Kühn S, Colzato LS (2015). Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands — a review. Journal of Psychiatric Research. DOI PubMed