Amino acids

Amino Acid Supplements

Often called the building blocks of protein, amino acids are involved in almost every process in the body — from forming the DNA inside every cell to building muscle, supporting neurotransmitters, fuelling your gut lining and growing every strand of hair. While your body produces some amino acids itself, others are "essential" and must come from your diet or a high-quality supplement.

Higher Nature's amino acid range is formulated with free-form, highly bioavailable amino acids and thoughtfully chosen co-factors, so each one is ready for your body to use. Whether you're looking to support a calm mind with L-Theanine, balance mood and sleep with naturally sourced 5-HTP, strengthen your gut barrier with L-Glutamine, or top up Lysine if you follow a plant-based diet or are prone to cold sores, you'll find a targeted formula here.

Every supplement is made to the same exacting standards Higher Nature has been trusted for over 30 years — transparent ingredient lists, no unnecessary excipients, and nutrients that work in synergy to support the way your body actually functions. Explore the full collection below to find the right amino acid for your wellbeing goals.

  • Glutamine Capsules
    The most abundant amino acid in the body. Great as part of a gut support protocol and provides cells which line the gastrointestinal tract with a source of energy. It is conditionally essential for providing energy during stressful time, after illness or if you have an active lifestyle.

    £16.95

  • Glutamine Powder
    Powder format of this versatile amino acid which is used widely throughout the body. Contains zero excipients. We use 100% high quality, free form L-glutamine for the best bioavailability. Ideal for flexible dosing, each 1/4 teaspoon provides 900mg L-gLutamine. // Please note that Glutamine Powder 100g has a BBE of 09/2025 // Special Offer: Save 15% off your one-time purchase of Glutamine Powder 100g using code: AUG25. T&C's apply.

    £29.45

  • L-Theanine
    Naturally derived, high quality extract from green tea leaves, each capsule provides 100mg L-theanine, to help cope with hectic lifestyles. This amino acid can be used to produce calming neurotransmitters, and is perfect to have on hand when you are feeling flustered or frazzled. Also supports a restful night.

    £28.95

  • Lysine
    This essential amino acid is needed to produce carnitine, which helps the body metabolise fats to produce energy, as well as collagen, the most abundant protein in the body. Ideal if you follow a plant-based diet or suffer from cold sores.

    £11.45

  • Serotone 5-HTP 50mg
    Naturally sourced amino acid 5-HTP (hydroxytryptophan). 5-HTP can be converted in the body to neurotransmitter serotonin, which has a range of important roles in the brain and body. Also includes essential co-factors needed to help 5-HTP to be used effectively.

    £26.95

  • Serotone 5HTP 100mg
    Naturally sourced amino acid 5-HTP (hydroxytryptophan). 5-HTP can be converted in the body to neurotransmitter serotonin, which has a range of important roles in the brain and body. Also includes essential co-factors needed to help 5-HTP to be used effectively. // Special Offer: Save 15% off your one-time purchase of Serotone 5-HTP 100mg 30 Capsules using code: AUG25. T&C's apply.

    £13.45

Why choose Higher Nature?

Our Heritage

Founded 30 years ago by an amazing woman and certified clinical psychologist who believed that the mind and body connection is integral to good health, Celia Wright travelled the world looking for the best quality ingredients. Her legacy has inspired three decades of customers, many of whom have trusted our formulas for years. The high standards set by our founder remain today, in every element of our formulations, from expert manufacturers to industry leading ingredient suppliers.

Unique Formulas

We know everything in the body is interconnected, that’s why many of our formulas are a combination of ingredients that work in synergy to support multiple areas of health, not just one. Our complexes are thoughtfully formulated, combining nutrients that work better together, and address both the mental and physical aspects of the areas they target. All our supplements are made with high quality ingredients with key nutrients.

Trustworthy

We believe in full transparency. Every single ingredient we use undergoes a thorough quality approvals process and we disclose all ingredients used in our supplements. Our experts use the most natural ingredients when it's best to do so but won’t dismiss any that are proven safe and effective. Our nature-led, balanced approach ensures we optimise each unique supplement to deliver maximum benefits, allowing you to continue being your incredible self.