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Daily Amino Acid

21st Century
4.7
★ ★ ★ ★ ★
(8679 ratings)
Histidine 17 mg
Isoleucine 63 mg
Leucine 105 mg
Phenylalanine 32 mg
Valine 58 mg
Lysine 93 mg
Product Image
Score 60

This supplement offers a broad mix of amino acids and a daily dose of calcium in an economical tablet form, intended for general wellness support.

How scoring works
scaleQuantity:120 Tablet(s) • (120 servings)
track_changesGoals:

leaderboard Score 60

This supplement offers a broad mix of amino acids and a daily dose of calcium in an economical tablet form, intended for general wellness support.

How scoring works
$9.99($0.08 per serving)
Amazon
$ 9.99
iHerb
$ 9.99
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psychologyAnalysis

Daily Amino Acid from 21st Century provides a spectrum of amino acids, including branched-chain amino acids (BCAAs) like L-Leucine, L-Isoleucine, and L-Valine, alongside other crucial ones like L-Lysine and L-Phenylalanine. These are the building blocks for proteins in the body, which are fundamental for many bodily processes.

The product also includes 300mg of calcium, derived from calcium carbonate and dicalcium phosphate, contributing to mineral intake. This combination aims to offer foundational support, suitable for individuals seeking a general amino acid presence in their diet without focusing on high, targeted doses of specific amino acids for specialized needs.

thumb_upPros
  • Offers a wide array of essential and non-essential amino acids.
  • Includes 300mg of calcium per serving.
  • Extremely low price per serving, making it very accessible.
  • Provides 120 servings in one bottle.
thumb_downCons
  • Individual amino acid doses are generally quite low.
  • The calcium source includes calcium carbonate, which may have varying absorption rates for some people.
  • May not be potent enough for those seeking significant support for specific amino acid deficiencies or performance goals.
warningWarnings
  • Individuals sensitive to amino acid supplements may experience mild digestive upset.
  • Those with specific health conditions, especially involving kidney function, should consult a professional before using amino acid supplements.
  • Phenylalanine is present; individuals with Phenylketonuria (PKU) should avoid this product.
scienceNutrient quality
55 Moderate impact

The product contains a good variety of amino acids in standard forms, but the individual doses are quite low. The calcium comes from common forms like carbonate and dicalcium phosphate.

visibilityIngredient transparency
85 Highest impact

The product label clearly lists all amino acids by name, including their forms where applicable, and specifies the exact quantity for each ingredient per serving. This offers good insight into what the product contains.

workspace_premiumValue for money
70 High impact

Considering the very low price per serving and the inclusion of a wide array of amino acids plus calcium, it offers fair value for someone seeking general, foundational nutritional support, despite the low individual ingredient doses.

thumb_upCustomer satisfaction
65 High impact

For a very affordable general amino acid supplement, this product likely meets basic expectations for those seeking general nutritional support. Its low cost helps make it an appealing option.

storefrontBrand
70 High impact

21st Century is known for offering value-priced supplements. While not typically a premium brand, it provides widely available basic formulations.

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track_changesGoals
flagBone Health
Impact
Moderate effect
The product includes 300mg of calcium, which contributes to daily calcium intake and can support bone health. However, this amount might not be sufficient for individuals with higher calcium needs or specific bone density concerns as a standalone supplement.
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flagNail Health
Impact
Moderate effect
Amino acids are the building blocks for keratin, a primary component of nails, and calcium is also important. While this product provides these, the individual amino acid doses are relatively low for a noticeable impact on nail health.
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flagEnergy
Impact
Moderate effect
Amino acids are involved in various metabolic pathways that contribute to energy production. However, the relatively low doses of individual amino acids in this blend may not provide a significant or immediate boost in energy for most users.
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flagAnti-Aging
Impact
Moderate effect
Amino acids are fundamental for cellular repair and protein synthesis, which are processes relevant to 'anti-aging'. However, this product's broad, low-dose approach means it provides general foundational support rather than targeted 'anti-aging' benefits.
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flagMood Support
Impact
Moderate effect
Some amino acids like L-Tyrosine and L-Phenylalanine are precursors to neurotransmitters that influence mood. The doses in this product (31mg Tyrosine, 32mg Phenylalanine) are quite low, so a direct or strong impact on mood support is unlikely for most individuals.
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flagBrain Health
Impact
Moderate effect
Amino acids are essential for neurotransmitter synthesis and overall brain function. While this product contains relevant amino acids, the low individual doses mean it offers more of a general building block supply rather than targeted support for brain health.
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flagMental Focus
Impact
Moderate effect
Similar to mood and brain health, certain amino acids are involved in cognitive processes. However, the low concentrations of specific amino acids in this blend are unlikely to provide a noticeable enhancement in mental focus for most users.
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scienceIngredients
IngredientAmount per serving
Calcium
150 mg
Sodium
5 mg
L-Histidine
17 mg
L-Isoleucine
63 mg
L-Leucine
105 mg
L-Lysine
93 mg
DL-Methionine
21 mg
L-Cysteine
11 mg
L-Phenylalanine
32 mg
L-Tyrosine
31 mg
L-Threonine
69 mg
L-Valine
58 mg
grain_off Gluten Free person Adults 18–50
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Calcium 65
The product provides 300mg of calcium per serving from a blend of calcium carbonate and dicalcium phosphate. This is a helpful amount to contribute to daily calcium needs, especially considering the product's primary focus isn't solely calcium.
scienceView ingredientinventory_2View products
Leucine 55
L-Leucine is present at 105mg per serving, which is a low amount compared to what is often used for muscle protein synthesis support. It provides a basic presence rather than a functional dose.
scienceView ingredientinventory_2View products
Valine 55
L-Valine is included at 58mg per serving. As with other BCAAs in this product, the dose is modest and serves more as part of a general blend rather than a targeted significant contribution.
scienceView ingredientinventory_2View products
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