Amino acids

Amino Acid Supplements Australia

Amino acid supplements fall into two distinct categories: individual amino acids used for specific functional purposes, and complete essential amino acid blends used to support overall protein adequacy. The formulas stocked here include two individual compounds – N-Acetylcysteine (NAC) and Trimethylglycine (TMG) – alongside a complete essential amino acid formula that supplies all nine amino acids the body cannot synthesise on its own.

This range is most relevant for people who have been directed to a specific amino acid by a practitioner, or who are looking to supplement essential amino acids outside of food protein sources. NAC, TMG, and essential amino acid blends serve distinct roles and are not interchangeable – knowing which applies to your situation is the first step before comparing products.

Key principle: NAC, TMG, and essential amino acid blends each serve a distinct purpose – confirm which amino acid your situation calls for before comparing dose, format, or brand within that category.

Amino Acid products at Fairfield Nutrition

Product Brand Best For Key Ingredients / Notes
Thorne NAC – N-Acetylcysteine 500mg Thorne NAC capsules, 500mg dose N-Acetylcysteine 500mg per capsule, 90 caps
Pure Encapsulations Amino-NR Pure Encapsulations Complete essential amino acid formula All 9 essential amino acids in naturally occurring ratios, 180 caps
MyBrainCo Pure NAC 250g MyBrainCo NAC powder, flexible dosing N-Acetylcysteine powder, 250g bulk format
Pure Encapsulations NAC – N-Acetylcysteine 600mg Pure Encapsulations NAC capsules, 600mg dose N-Acetylcysteine 600mg per capsule, 90 caps
MyBrainCo Pure TMG 100g MyBrainCo TMG powder, targeted use Trimethylglycine powder, 100g

How to choose between amino acid products

Choosing within this range is primarily a question of which amino acid your situation calls for and then, within that, whether a capsule or powder format suits your daily routine.

  • NAC capsules: Thorne NAC (500mg) and Pure Encapsulations NAC (600mg) are both standard capsule formats. The dose difference is modest – the choice between them typically comes down to your practitioner’s specific recommendation or brand preference rather than a meaningful formulation difference.
  • NAC powder: MyBrainCo Pure NAC (250g) is a bulk powder format. This suits people who prefer to adjust their dose with more precision, mix it into liquids, or who use NAC regularly enough that a larger format is practical.
  • Essential amino acid blend: Pure Encapsulations Amino-NR provides all nine essential amino acids in naturally occurring ratios. This is a different product category from individual amino acids – it is not a substitute for NAC or TMG, and is relevant where general amino acid adequacy is the goal rather than a specific targeted compound.
  • TMG powder: MyBrainCo Pure TMG (100g) is the only trimethylglycine option available. TMG serves a distinct role from NAC or EAA blends – if you have been directed to TMG specifically, this is the relevant product.

If you are unsure which amino acid applies to your situation, your practitioner is the best guide.


All Amino Acid products stocked at Fairfield Nutrition are shown below.

Amino Acid Supplements Australia | Fairfield Nutrition