NOW Foods Sports Amino Complete: A Convenient Blend of 20 Amino Acids with Vitamin B6

Protein is essential for maintaining muscles, organs, skin, enzymes, hormones and many other structures throughout the body. Before dietary protein can be used, it must be broken down into smaller components known as amino acids.

NOW Foods Sports Amino Complete provides a mixture of 20 amino acids derived from whey protein isolate, soy protein isolate and sodium caseinate, together with added L-glutamine, L-arginine and L-ornithine.

The formula includes all nine essential amino acids, the three branched-chain amino acids and a range of non-essential amino acids. Vitamin B6 is also included to support the normal metabolism of protein and amino acids.

What Is NOW Foods Sports Amino Complete?

NOW Foods Sports Amino Complete is a capsule-based amino-acid supplement formulated for active adults and people seeking a convenient way to add a small amount of amino acids to their daily nutrition.

Each suggested four-capsule serving provides:

• 2,800 mg of peptide-bound and free-form amino-acid sources
• 2 grams of protein
• 13 mg of vitamin B6 from pyridoxine hydrochloride
• All nine essential amino acids
• The three BCAAs: leucine, isoleucine and valine
• 20 amino acids in total

The bottle contains 360 capsules, providing 90 four-capsule servings when taken according to the product directions.

Understanding Essential and Non-Essential Amino Acids

Amino acids are commonly divided into essential, non-essential and conditionally essential categories.

Essential amino acids cannot be manufactured by the body in adequate quantities and must be obtained through food or supplements.

The nine essential amino acids are:

• Histidine
• Isoleucine
• Leucine
• Lysine
• Methionine
• Phenylalanine
• Threonine
• Tryptophan
• Valine

Non-essential amino acids can normally be produced by the body. This does not mean they are unimportant. They remain necessary for numerous structural and metabolic processes.

Certain amino acids may become conditionally essential during periods of illness, injury, rapid growth or substantial physical stress because the body’s requirements may temporarily increase.

Typical Amino-Acid Profile per Serving

The manufacturer provides the following typical amino-acid profile for one four-capsule serving. Natural variations may occur because part of the formula is derived from protein ingredients.

Essential Amino Acids

• L-leucine: 205 mg
• L-lysine: 185 mg
• L-valine: 141 mg
• L-threonine: 141 mg
• L-isoleucine: 115 mg
• L-phenylalanine: 72 mg
• L-histidine: 37 mg
• L-tryptophan: 37 mg
• L-methionine: 35 mg

Non-Essential and Conditionally Essential Amino Acids

• L-glutamic acid: 410 mg
• L-arginine: 276 mg
• L-aspartic acid: 220 mg
• L-glutamine: 204 mg
• L-proline: 123 mg
• L-serine: 106 mg
• L-alanine: 97 mg
• L-tyrosine: 66 mg
• Glycine: 47 mg
• L-cysteine: 38 mg
• L-ornithine: 31 mg

Potential Health and Nutritional Benefits

1. Supports Normal Muscle Maintenance

Muscle tissue is continually undergoing breakdown and rebuilding. Amino acids obtained from dietary protein provide the raw materials required to repair existing proteins and construct new ones.

The essential amino acids are particularly important because the body cannot manufacture them in sufficient amounts. NOW Foods Amino Complete contains all nine, making it broader than a supplement containing BCAAs alone.

This may be useful for active adults, people undertaking resistance exercise and those who sometimes consume meals containing limited protein.

However, one serving provides only 2 grams of protein. It should therefore be viewed as a nutritional top-up rather than a substitute for a substantial serving of meat, fish, eggs, dairy food, tofu, legumes or protein powder.

2. Provides the Three Branched-Chain Amino Acids

Leucine, isoleucine and valine are known as branched-chain amino acids because of their chemical structure.

Leucine is involved in cellular signalling associated with muscle-protein synthesis. Isoleucine and valine also contribute to protein formation and can be metabolised within muscle tissue during physical activity.

The BCAAs in this supplement may complement a balanced exercise nutrition plan. However, research has not consistently shown that low-dose BCAA supplementation produces major improvements in exercise performance when a person already consumes adequate dietary protein.

Muscle recovery and development still depend primarily on total protein intake, sufficient calories, progressive exercise, sleep and recovery time.

3. May Complement Post-Exercise Nutrition

Exercise creates a temporary increase in muscle-protein turnover. Consuming adequate protein after exercise helps provide the amino acids needed during the recovery and adaptation process.

Amino Complete may be convenient when a full meal is not immediately available or when someone prefers capsules over a flavoured powder.

The capsules can accompany post-exercise food, but they do not provide enough protein to replace a complete recovery meal. Sports-nutrition guidance commonly considers a much larger serving of high-quality protein more suitable for maximising the muscle-protein response.

4. Supports Normal Protein Metabolism

Each serving provides 13 mg of vitamin B6. Vitamin B6 acts as a cofactor for numerous enzymes, including enzymes involved in amino-acid and protein metabolism.

It also contributes to normal red-blood-cell formation, immune function, glycogen metabolism and neurotransmitter production.

These are normal physiological functions of vitamin B6. Consuming more than the body needs does not necessarily produce greater energy, faster muscle growth or improved athletic performance.

5. Contains Glutamine

Glutamine is one of the most abundant amino acids in the human body. It participates in nitrogen transport and can be used as fuel by certain rapidly dividing cells, including cells within the intestinal and immune systems.

The body can normally manufacture glutamine, and most healthy people obtain additional glutamine through protein-containing foods.

Each serving of Amino Complete provides a typical amount of 204 mg of L-glutamine. This is considerably less than the gram-level quantities commonly used in studies of isolated glutamine supplements.

6. Contains Arginine

Arginine has several biological functions. It participates in the urea cycle, helps the body process nitrogen-containing waste and can be used to produce nitric oxide.

Nitric oxide helps regulate blood-vessel relaxation and normal circulation. This is one reason arginine is frequently included in sports and cardiovascular supplements.

A typical serving provides 276 mg of L-arginine. This is a relatively modest amount compared with the multi-gram servings often examined in research.

7. Supplies Amino Acids Used in Structural Proteins

Several amino acids in the formula contribute to structural proteins found throughout the body.

• Glycine and proline are major components of collagen.
• Cysteine contributes to proteins and the antioxidant glutathione.
• Lysine is required for normal protein formation.
• Serine participates in the formation of cell membranes and other biological compounds.

The presence of these amino acids does not mean the supplement has been proven to rebuild joints, remove wrinkles or treat connective-tissue disorders. It simply provides small quantities of nutrients used in normal protein metabolism.

8. May Be Convenient for Older Adults

Maintaining strength and muscle becomes increasingly important with age. Resistance exercise and adequate protein intake can help support mobility, balance and physical independence.

An amino-acid supplement may be useful for some older adults with small appetites or inconsistent diets. However, older adults generally benefit from meaningful servings of complete protein rather than relying on a capsule formula containing only 2 grams of protein.

Anyone experiencing unexplained weight loss, muscle loss, swallowing difficulty or reduced appetite should seek professional nutritional or medical advice.

What Is the Difference Between Amino Complete and Protein Powder?

A protein powder normally provides a substantial amount of protein in each serving. Depending on the product, this is often enough to make a meaningful contribution to a person’s daily protein target.

NOW Foods Amino Complete supplies only 2 grams of protein per four-capsule serving. Its main advantage is convenience rather than protein quantity.

Amino Complete may suit someone who:

• Does not like flavoured protein drinks
• Wants an easy-to-carry capsule product
• Wants a broad amino-acid profile
• Only needs a small nutritional addition

A protein-rich meal or full protein shake is generally more appropriate when the objective is to substantially increase daily protein intake.

Scientific Perspective

The science supporting adequate dietary protein and essential amino acids for muscle maintenance is well established. Essential amino acids are necessary for building body proteins, and leucine participates in signalling involved in muscle-protein synthesis.

The evidence is less convincing that small supplemental quantities of individual amino acids substantially improve performance or muscle growth in people who already consume enough complete protein.

Dosage is an important consideration. The entire blend in Amino Complete provides 2.8 grams, while evidence-based sports-nutrition strategies commonly use considerably larger servings of complete protein.

The formula may still provide convenience and nutritional variety, but realistic expectations are important. It should not be expected to produce rapid muscle gain, prevent all soreness or compensate for poor nutrition.

A Holistic and Naturopathic Perspective

From a holistic or naturopathic perspective, amino acids may be viewed as foundational nutrients that support tissue renewal, enzyme activity, neurotransmitter production and normal metabolic processes.

A practitioner may consider an amino-acid supplement when reviewing an individual’s diet, digestive function, appetite, exercise routine and recovery needs.

A responsible holistic approach would also focus on:

• Eating varied sources of complete and complementary proteins
• Including vegetables, fruit and whole foods
• Performing regular resistance and balance exercise
• Allowing adequate recovery between demanding workouts
• Getting sufficient sleep
• Correcting medically confirmed nutritional deficiencies
• Investigating persistent fatigue or muscle loss rather than masking symptoms

Supplements are best used to complement these foundations rather than replace them.

Who Might Consider NOW Foods Amino Complete?

The product may appeal to:

• Active adults
• People undertaking resistance or fitness training
• Adults wanting a capsule alternative to protein powder
• People with occasionally low protein intake
• Older adults focused on maintaining muscle
• People wanting all nine essential amino acids in one formula
• Competitive athletes looking for a product carrying an Informed Sport mark

Competitive athletes should still check the current product packaging and certification records before use, as formulas, manufacturing arrangements and tested-batch status can change.

Vegetarian, Vegan and Allergen Information

The capsule shell is made from hypromellose, a plant-derived cellulose material. However, a vegetable capsule does not make the complete product vegan.

The amino-acid blend contains:

• Whey protein isolate
• Soy protein isolate
• Sodium caseinate

Whey and caseinate are derived from milk. The product is therefore:

• Suitable for many lacto-vegetarians
• Not suitable for vegans
• Not suitable for people with milk allergies
• Not suitable for people with soy allergies

According to the product information, it is not manufactured with wheat, gluten, egg, fish, shellfish, tree-nut or sesame ingredients. It is produced in a facility that also processes other allergens.

Anyone with a serious food allergy should inspect the current package before taking the product.

How to Take It

The manufacturer recommends taking four capsules daily, preferably with juice.

Some people may find the capsules easier to tolerate with a meal or snack. Drink adequate water and follow the directions on the current product label.

There is no need to take more than the recommended serving in an attempt to obtain faster results.

Important Vitamin B6 Safety Information

Each serving provides 13 mg of vitamin B6. This is considerably higher than the normal daily requirement for most adults.

In Australia, supplements providing more than 10 mg of vitamin B6 in a daily dose require a warning about peripheral neuropathy. The European Food Safety Authority has established an adult tolerable upper intake level of 12.5 mg per day.

Peripheral neuropathy is nerve damage that may cause:

• Tingling
• Burning sensations
• Numbness
• Altered sensation in the hands or feet
• Balance or coordination difficulties in more serious cases

Vitamin B6 may be present in several supplements at the same time, including multivitamins, magnesium products, zinc formulas, B-complex supplements, energy products and stress-support formulas.

Check all supplement labels before combining them. Vitamin B6 may be listed as pyridoxine hydrochloride, pyridoxal-5-phosphate, P-5-P or another related form.

Stop using supplementary vitamin B6 and seek medical advice if tingling, burning or numbness develops.

Who Should Seek Professional Advice First?

Speak with a doctor, pharmacist or accredited practising dietitian before using Amino Complete if you:

• Are pregnant or breastfeeding
• Are under 18 years of age
• Have kidney or liver disease
• Have been advised to restrict protein
• Have a disorder affecting amino-acid metabolism
• Take prescription medicines
• Have low blood pressure
• Use several supplements containing vitamin B6
• Have unexplained numbness or nerve symptoms
• Are preparing for surgery

Possible side effects may include nausea, digestive discomfort, headache or changes in bowel habits. Taking the capsules with food may improve tolerance for some people.

The Bottom Line

NOW Foods Sports Amino Complete provides a convenient mixture of 20 amino acids, including all nine essential amino acids and the BCAAs leucine, isoleucine and valine.

Its principal advantage is convenience. Four capsules provide a broad amino-acid profile without requiring a flavoured drink or large shake.

Its main limitation is dosage. The serving contains only 2 grams of protein, and the individual quantities of leucine, glutamine, arginine and the other amino acids are relatively modest.

The product may complement an active lifestyle and balanced diet, but it should not replace complete protein-rich meals, resistance exercise, adequate sleep or professional healthcare.

Particular care is required with its 13 mg vitamin B6 content. Check other supplements for additional vitamin B6 and seek advice if there is any concern about cumulative intake.

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Health disclaimer: This article provides general educational information and is not medical advice. Dietary supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label and consult an appropriate healthcare professional when necessary.

Sources and Further Reading

• NOW Foods Sports Amino Complete product information
• NOW Foods: Amino Complete product information
• US National Institutes of Health: Exercise and Athletic Performance Supplements
• US National Institutes of Health: Vitamin B6
• Australian Therapeutic Goods Administration: Vitamin B6 Safety