NOW Foods has five single amino acid products in this group at Supps247.
At a glance
| Product | What it is |
|---|---|
| L-Tyrosine 500 mg and 750 mg | Used by the body to make dopamine, adrenaline and thyroid hormones |
| L-Phenylalanine 500 mg | An essential amino acid the body turns into tyrosine |
| L-Lysine | An essential amino acid, lower in grain based diets |
| L-Carnitine 500 mg | Carries fatty acids into cells to be burned for energy |
What to know
You get all of these from protein foods. Tyrosine has been studied for mental performance under stress and sleep loss, with some positive short term results. Lysine has been studied for cold sores, with mixed results. Carnitine supplements have not been shown to burn body fat in healthy people. Vegans and vegetarians have lower carnitine intake but the body makes its own.
Who should check first
- Phenylketonuria (PKU): do not take phenylalanine.
- Thyroid conditions or thyroid medicine: speak to your doctor before taking tyrosine.
- MAOI antidepressants or levodopa: do not take tyrosine or phenylalanine without your doctor's advice.
- Kidney disease, or pregnant or breastfeeding: check with your doctor first.
How to use and where to buy
Follow the label on each product. Shop them online at Supps247 with Australia-wide delivery or click and collect, or browse more from NOW Foods.
Checked against the product listings on 12 November 2026. Always read the label and follow the directions. General information, not medical advice.
