NOW Foods L-Tyrosine Powder 4 oz

What it is

NOW Foods L-Tyrosine Pure Powder is a single-ingredient amino acid powder sold in a 4 oz (113 g) bottle. The Supplement Facts panel lists exactly one entry — L-Tyrosine in its free-form, at 350 mg per serving — and the "Other ingredients" line underneath it reads, in full: None. A serving is 1/4 of a level teaspoon, and the panel puts the bottle at about 323 servings.

That makes this one of the plainest products in the Amino Acids range: a loose powder with nothing else declared on the panel and no capsule to swallow. The label is explicit that the powder is sold by weight rather than volume, so the 113 g printed on the front is the quantity you are buying and the quarter-teaspoon is simply the measure the manufacturer suggests for using it.

What's inside

Tyrosine is one of the amino acids that make up dietary protein, and this bottle contains it on its own in free-form — that is, as the individual molecule rather than bound into a protein chain. The label classes it as "conditionally indispensable", a nutritional term meaning the body ordinarily builds its own supply from another amino acid, phenylalanine, so it is not counted among the amino acids that must come from food in all circumstances. It turns up naturally in protein-rich foods — cheese, soy, meat, fish, eggs, nuts and seeds among them.

NOW prints a grade statement on both the front and the back of this bottle: "NOW® L-Tyrosine is pharmaceutical grade." That phrase is the manufacturer's own description of the raw material and is reproduced here as printed. The panel also warns that "natural color variation may occur in this product", which is normal for a bulk amino acid powder and is the manufacturer's way of saying that batch-to-batch shade differences are not a fault.

If you want to compare this panel against other products' filed labels, the NIH maintains a public Dietary Supplement Label Database, and the NIH Office of Dietary Supplements publishes general background in Dietary supplements: what you need to know. Neither source is a comment on this product.

Supplement Facts

The arithmetic on the panel is self-consistent: 113 g divided by a 350 mg serving gives 322.8, which is the "about 323" the label prints.

How to use it

The printed Suggested Usage reads: "Mix 1/4 level teaspoon in juice or water, preferably between meals, 1 to 3 times daily." Juice and water are both named on the label; no other liquid is specified, and no time of day is given. Storage guidance is equally short — "Store in a cool, dry place after opening."

A level quarter-teaspoon is a small measure, so a narrow spoon and a steady hand are worth more here than a scoop. Because the powder is sold by weight, how far a bottle goes depends on how closely your quarter-teaspoon matches the manufacturer's.

Who it's for

This is a bulk powder for adults who already know they want tyrosine and would rather measure it than swallow a capsule. The format suits anyone who wants to set their own serving size, who takes several things at once and prefers to combine them in a single drink, or who simply prefers buying an amino acid loose. It sits in the wider Supplements range alongside other single-ingredient amino acids.

It is less suited to anyone who wants a fixed, pre-measured dose with no equipment, or who needs to carry servings around during the day. The label restricts the product to adults.

Good to know

The caution block is printed on the bottle and is reproduced here in full: "For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Persons with thyroid disease (hyperthyroidism), melanoma, or those taking MAO inhibitors or other mood altering medications should seek the advice of a physician before consuming this product. Keep out of reach of children."

The allergen statement reads: "Not manufactured with wheat, gluten, soy, corn, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens." The second sentence matters as much as the first — the facility handles those allergens even though this formula does not contain them.

The panel also carries a GMP Quality Assured roundel and the line "Produced in a GMP facility". The bottle itself is printed as being made from 100% PCR (post-consumer recycled) resin. The NCCIH page on dietary and herbal supplements covers general safety considerations for supplement use.

Frequently Asked Questions

What is actually in this bottle besides the tyrosine?

Nothing is declared besides the tyrosine. The Supplement Facts panel's "Other ingredients" line reads "None", so what the bottle holds is 113 g of free-form L-tyrosine powder.

How much tyrosine is in one serving?

350 mg. The serving is 1/4 of a level teaspoon, which the label states weighs approximately 350 mg, and the panel marks the amount with a double asterisk because no Daily Value has been established for tyrosine.

What should I mix the powder into?

Juice or water — those are the two liquids the label names. The printed instruction is to mix 1/4 level teaspoon in juice or water, preferably between meals, 1 to 3 times daily, and the label gives no preferred time of day.

Is this bottle suitable if I avoid gluten or soy?

The label states the product is not manufactured with wheat, gluten, soy, corn, milk, egg, fish, shellfish, tree nut or sesame ingredients. It also states that the GMP facility producing it processes other ingredients that do contain those allergens, so anyone managing a severe allergy should weigh that shared-facility statement before buying.

How is the order packaged for delivery?

Orders ship in plain outer packaging with no indication of the contents. It will not show the Gear Isle name.

Product information compiled and reviewed by the Gear Isle product team. We transcribe supplement facts directly from manufacturer packaging. Found an error? Tell us.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Dietary supplement for adults 18 and over. Consult a licensed healthcare professional before use, especially if you have a medical condition, heart concerns, or take prescription medication (including nitrates). Keep out of reach of children.