Source Naturals L-Tyrosine, Free Form Amino Acid Food Supplement, 100 Tablets

What Is L-Tyrosine?

L-Tyrosine is a naturally occurring amino acid that serves as a building block for important neurotransmitters in the brain. As a dietary supplement, it provides the free-form version of this amino acid, which is readily absorbed and utilised by the body. Source Naturals offers L-Tyrosine in a pure, free-form tablet. This essential amino acid is not produced by the body and must be obtained through diet or supplementation, making it a popular choice for those looking to maintain mental sharpness and emotional balance.*

How to Select a Quality L-Tyrosine Supplement

When selecting an L-Tyrosine supplement, purity and form matter. Free-form L-Tyrosine ensures optimal absorption, as it is already in its active amino acid structure. Look for products that are free from unnecessary additives—Source Naturals L-Tyrosine contains no yeast, dairy, gluten, egg, soy, wheat, sugar, starch, salt, preservatives, or artificial colours, flavours, or fragrances. With over 40 years of trust in the supplement industry, Source Naturals is committed to quality and purity. The suggested use is one tablet daily. Tablets are convenient for consistent dosing and are ideal for those who prefer not to take capsules or powders.

Who Might Benefit from L-Tyrosine?

L-Tyrosine may be considered by individuals who experience mental fatigue from demanding work, study, or exercise. It is also popular amongst vegetarians and vegans, who may have lower dietary intake of tyrosine from plant sources. Those looking to support healthy stress adaptation or maintain cognitive function during sleep deprivation might also find it helpful. As with any supplement, it is best to consult with a health care professional before starting, especially if you are pregnant, nursing, or have a thyroid condition.

Key Aspects of L-Tyrosine Supplementation

L-Tyrosine plays a vital role in the production of dopamine, norepinephrine, and epinephrine—neurotransmitters that influence mood, focus, and the body's stress response. It also contributes to the synthesis of thyroid hormones, which regulate metabolism and energy levels. Many people report that taking L-Tyrosine helps them stay alert and focussed when fatigue sets in. Because it is a free-form amino acid, it does not require digestion to be broken down, allowing for faster absorption.

Ingredients to Consider

For a single-ingredient supplement like L-Tyrosine, the primary consideration is the form and purity. Free form amino acids are preferred because they are ready for absorption without digestion. Avoid products with fillers, binders, or common allergens. Source Naturals use only the active L-Tyrosine in a base of microcrystalline cellulose and magnesium stearate (vegetable source) to ensure tablet integrity without compromising quality.

Frequently Asked Questions

What is the difference between L-Tyrosine and N-Acetyl L-Tyrosine? L-Tyrosine is the free-form amino acid, while N-Acetyl L-Tyrosine (NALT) is a more soluble form often used for faster absorption. However, L-Tyrosine is the most common and cost-effective form.

Can I take L-Tyrosine on an empty stomach? Yes, it can be taken with or without food. Some people prefer taking it with a meal to avoid potential stomach upset, but it is generally well-tolerated.

How long does it take for L-Tyrosine to work? Effects may be felt within 30–60 minutes after ingestion, as it crosses the blood-brain barrier quickly. Consistent daily use may support ongoing neurotransmitter balance.

Are there any side effects? L-Tyrosine is generally safe at recommended doses. Some individuals may experience mild digestive discomfort or headache. It is not recommended for those with hyperthyroidism or taking MAO inhibitors without medical supervision.

*This product is a food supplement. Food supplements should not be used as a substitute for a varied diet and healthy lifestyle.