21st Century Full Fuel 365™, BCAA Performance, 240 Tablets supplement bottle
21st Century

Full Fuel 365™, BCAA Performance, 240 Tablets

What We Researched
15 active ingredients analyzed · 10 inactive ingredients decoded · 2 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
75
Product Score Fair
76
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium (as Dicalcium Phosphate & Calcium Carbonate) 600 mg 46%
L-Histidine (as L-histidine HCI) 68 mg **
L-Isoleucine 252 mg **
L-Leucine 420 mg **
L-Lysine (as L-lysine HCI) 372 mg **
dl-Methionine 84 mg **
L-Cysteine (as L-cysteine HCI) 44 mg **
L-Phenylalanine 128 mg **
L-Tyrosine 124 mg **
L-Threonine 276 mg **
L-Valine 232 mg **
Bioavailability Excellent

Absorption Rating

  • Calcium (as Dicalcium Phosphate & Calcium Carbonate) Fair
  • L-Histidine (as L-histidine HCI) Good
  • L-Isoleucine Good
  • L-Leucine Good
  • L-Lysine (as L-lysine HCI) Good
  • dl-Methionine Good
  • L-Cysteine (as L-cysteine HCI) Good
  • L-Phenylalanine Good
  • L-Tyrosine Good
  • L-Threonine Good
  • L-Valine Good
Other Ingredients Very Good

Fillers & Additives

  • Whey
  • Cellulose
  • Stearic Acid
  • Croscarmellose Sodium
  • Magnesium Silicate
  • Magnesium Stearate
  • Polyethylene Glycol Low
  • Polysorbate Medium
  • Polyvinyl Alcohol
  • Silicon Dioxide
Efficacy Poor

Dosage Analysis

  • Calcium (as Dicalcium Phosphate & Calcium Carbonate) 600 mg Effective
  • L-Histidine (as L-histidine HCI) 68 mg Under-dosed
  • L-Isoleucine 252 mg High
  • L-Leucine 420 mg Under-dosed
  • L-Lysine (as L-lysine HCI) 372 mg Under-dosed
  • dl-Methionine 84 mg Under-dosed
  • L-Cysteine (as L-cysteine HCI) 44 mg Under-dosed
  • L-Phenylalanine 128 mg Under-dosed
  • L-Tyrosine 124 mg Under-dosed
  • L-Valine 232 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 10
Total Carbohydrate 2 g <1%†
Total Sugars 1 g **
Calcium (as Dicalcium Phosphate & Calcium Carbonate) 600 mg 46%
Sodium 20 mg <1%
L-Histidine (as L-histidine HCI) 68 mg **
L-Isoleucine 252 mg **
L-Leucine 420 mg **
L-Lysine (as L-lysine HCI) 372 mg **
dl-Methionine 84 mg **
L-Cysteine (as L-cysteine HCI) 44 mg **
L-Phenylalanine 128 mg **
L-Tyrosine 124 mg **
L-Threonine 276 mg **
L-Valine 232 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Whey Generally_safe

It is used as a filler or protein source.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Magnesium Silicate Generally_safe

It is used to improve powder flow and prevent clumping.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Polysorbate Generally_safe

It is used to help mix oil and water-based ingredients.

Polyvinyl Alcohol Generally_safe

It is used as a coating for tablets or capsules.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$23$22$21$20$19 Mar 12 $21.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
21st Century

Founded 1991 · Tempe, Arizona, United States · 231 products · 21stcenturyvitamins.com/

Certifications

2 certifications
Consumerlab Verified
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Claimed Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

4 incidents
Prop 65 Lead2021-06-22Source
Recall Vitamin D3 5000 IU Tablets2021-05-19Source
Lawsuit False advertising of Glucosamine/Chondroitin supplements.2012Source
Prop 65 Lead2008-12-23Source
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Frequently Asked Questions
Is 21st Century Full Fuel 365™, BCAA Performance a good supplement?

21st Century Full Fuel 365™, BCAA Performance, 240 Tablets received a product quality score of 75/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 15 active ingredients with 60 servings per container. Of the 10 inactive ingredients, 5 are rated safe and 1 are flagged for review. The manufacturer, 21st Century, holds a brand trust score of 76/100 with 2 verified certifications including Consumerlab, Nsf Gmp.

What are the ingredients in 21st Century Full Fuel 365™, BCAA Performance?

21st Century Full Fuel 365™, BCAA Performance contains 15 active ingredients: Calories (10), Total Carbohydrate (2 g), Total Sugars (1 g), Calcium (as Dicalcium Phosphate & Calcium Carbonate) (600 mg), Sodium (20 mg), L-Histidine (as L-histidine HCI) (68 mg), and 9 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century Full Fuel 365™, BCAA Performance safe to take?

21st Century Full Fuel 365™, BCAA Performance, 240 Tablets has been analyzed for ingredient safety across all its components. Of 10 inactive ingredients, 5 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is 21st Century a trustworthy supplement brand?

21st Century receives a brand trust score of 76/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Tempe, Arizona, United States, the company offers 231 products in their lineup. They hold 2 verified certifications including Consumerlab, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: 21st Century has 4 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.