NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor supplement bottle
NaturesPlus

SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor

What We Researched
24 active ingredients analyzed · 36 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
59
Product Score Poor
59
Brand Score Poor

Product Analysis

Transparency Very Poor

Supplement Facts

IngredientAmount% DV
Vitamin D3 20 mcg 100%
Calcium 300 mg 25%
Iron 4.5 mg 25%
Potassium 100 mg 2%
Vitamin A (5000 IU) 1500 mcg RAE 170%
Vitamin C 90 mg 100%
Vitamin E (30 IU) 20 mg 130%
Thiamin 1.5 mg 130%
Riboflavin 1.7 mg 130%
Niacin 20 mg 130%
Vitamin B6 2 mg 120%
Folate (400 mcg folic acid) 667 mcg DFE 170%
Vitamin B12 5 mcg 200%
Biotin 300 mcg 1000%
Pantothenic Acid 10 mg 200%
Phosphorus 200 mg 20%
Iodine 150 mcg 100%
Magnesium 80 mg 20%
Zinc 15 mg 140%
Selenium 21 mcg 40%
Manganese 5 mg 220%
Chromium 18 mcg 50%
Molybdenum 20 mcg 40%
Choline 21 mg 4%
Bioavailability Very Good

Absorption Rating

  • Vitamin D3 Good
  • Calcium Good
  • Iron Fair
  • Potassium Good
  • Vitamin A (5000 IU) Good
  • Vitamin C Fair
  • Vitamin E (30 IU) Good
  • Thiamin Good
  • Riboflavin Good
  • Niacin Good
  • Vitamin B6 Fair
  • Folate (400 mcg folic acid) Fair
  • Vitamin B12 Fair
  • Biotin Good
  • Pantothenic Acid Good
  • Phosphorus Good
  • Iodine Good
  • Magnesium Good
  • Zinc Fair
  • Selenium Good
  • Manganese Good
  • Chromium Fair
  • Molybdenum Good
  • Choline Poor
Other Ingredients Excellent

Fillers & Additives

  • Proprietary non-GMO protein blend (soy [isolated soy protein and fermented soy], rice protein, pea protein)
  • Fructose
  • Maltodextrin
  • Oligofructose
  • Di-Calcium Phosphate
  • Non-GMO Xanthan Gum
  • Potassium Citrate
  • Microcrystalline Cellulose
  • Magnesium Oxide
  • Spirulina
  • Vitamin C
  • Choline Bitartrate
  • Inositol
  • Vitamin E (d-alpha tocopheryl) acetate
  • Vitamin A Palmitate
  • Biotin
  • Apple Pectin
  • Niacinamide
  • Zinc Oxide
  • Manganese Sulfate
  • Calcium Pantothenate
  • Ferrous Fumarate Low
  • Vegan Cholecalciferol
  • Lecithin
  • Lemon bioflavonoid complex
  • Riboflavin
  • Pyridoxine HCl
  • Thiamin HCl
  • Vitamin B12
  • Potassium Iodide
  • Folic Acid
  • Sodium Molybdate
  • Sodium Selenite
  • Chromium Chloride
  • Bromelain
  • Methylcobalamin
Efficacy Good

Dosage Analysis

  • Vitamin D3 20 mcg Effective
  • Calcium 300 mg Under-dosed
  • Iron 4.5 mg Under-dosed
  • Potassium 100 mg Under-dosed
  • Vitamin A (5000 IU) 1500 mcg RAE Effective
  • Vitamin C 90 mg Effective
  • Vitamin E (30 IU) 20 mg Effective
  • Thiamin 1.5 mg Effective
  • Riboflavin 1.7 mg Effective
  • Niacin 20 mg Effective
  • Vitamin B6 2 mg Effective
  • Folate (400 mcg folic acid) 667 mcg DFE Effective
  • Vitamin B12 5 mcg Effective
  • Biotin 300 mcg Effective
  • Pantothenic Acid 10 mg Effective
  • Phosphorus 200 mg Under-dosed
  • Iodine 150 mcg Effective
  • Magnesium 80 mg Under-dosed
  • Zinc 15 mg Effective
  • Selenium 21 mcg Under-dosed
  • Manganese 5 mg Effective
  • Chromium 18 mcg Under-dosed
  • Molybdenum 20 mcg Under-dosed
  • Choline 21 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D3 20 mcg 100%
Calcium 300 mg 25%
Iron 4.5 mg 25%
Potassium 100 mg 2%
Vitamin A (5000 IU) 1500 mcg RAE 170%
Vitamin C 90 mg 100%
Vitamin E (30 IU) 20 mg 130%
Thiamin 1.5 mg 130%
Riboflavin 1.7 mg 130%
Niacin 20 mg 130%
Vitamin B6 2 mg 120%
Folate (400 mcg folic acid) 667 mcg DFE 170%
Vitamin B12 5 mcg 200%
Biotin 300 mcg 1000%
Pantothenic Acid 10 mg 200%
Phosphorus 200 mg 20%
Iodine 150 mcg 100%
Magnesium 80 mg 20%
Zinc 15 mg 140%
Selenium 21 mcg 40%
Manganese 5 mg 220%
Chromium 18 mcg 50%
Molybdenum 20 mcg 40%
Choline 21 mg 4%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Proprietary non-GMO protein blend (soy [isolated soy protein and fermented soy], rice protein, pea protein) Unknown
Fructose Generally_safe

It is used as a sweetener.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Oligofructose Generally_safe

It is used as a filler and to support digestive health.

Di-Calcium Phosphate Generally_safe

It is used as a filler or source of calcium and phosphorus.

Non-GMO Xanthan Gum Generally_safe

It is added to improve the texture and consistency of the supplement.

Potassium Citrate Safe

It is used as a mineral supplement and buffer.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Magnesium Oxide Generally_safe

It is used to provide magnesium, an essential mineral.

Spirulina Generally_safe

It is used to impart a blue or green color.

Vitamin C Safe

It is added as a source of vitamin C.

Choline Bitartrate Generally_safe

It is used to supplement choline intake.

Inositol Safe

It is used for its potential benefits related to cell signaling and mental health.

Vitamin E (d-alpha tocopheryl) acetate Unknown
Vitamin A Palmitate Generally_safe

It is added to supplements as a source of vitamin A.

Biotin Safe

It is used for its potential benefits related to hair, skin, and nail health.

Apple Pectin Safe

It is used as a thickening agent or gelling agent.

Niacinamide Safe

It is included for its potential health benefits.

Zinc Oxide Generally_safe

It is used as a source of zinc.

Manganese Sulfate Generally_safe

It provides a source of manganese.

Calcium Pantothenate Safe

It provides a source of vitamin B5.

Ferrous Fumarate Caution

It is used to supplement iron intake.

Vegan Cholecalciferol Safe

It is used as a source of vitamin D3 for vegans.

Lecithin Safe

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

Lemon bioflavonoid complex Unknown
Riboflavin Safe

It is used as a source of vitamin B2.

Pyridoxine HCl Generally_safe

It is used as a source of vitamin B6.

Thiamin HCl Unknown
Vitamin B12 Safe

It is included for its nutritional value.

Potassium Iodide Generally_safe

It provides iodine, an essential mineral.

Folic Acid Safe

It is used as a source of folate.

Sodium Molybdate Generally_safe

It is used to supplement molybdenum intake.

Sodium Selenite Generally_safe

It is added to supplements to provide selenium, an essential trace mineral.

Chromium Chloride Generally_safe

It is added to supplements to provide chromium, an essential trace mineral.

Bromelain Generally_safe
Methylcobalamin Safe

It is included as a source of vitamin B12.

Price Comparison

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

Brand Trust Report
NaturesPlus

Founded 1972 · Melville, New York, United States · 420 products · naturesplus.com

Transparency

3 claims
Third Party Testing Claim — Claimed
In House Testing — Claimed

Violation History

1 incident
Recall Keto Living Sugar Control Capsules2022-05-06Source
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Frequently Asked Questions
Is NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor a good supplement?

NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor received a product quality score of 59/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 24 active ingredients Of the 36 inactive ingredients, 14 are rated safe and 1 are flagged for review. The manufacturer, NaturesPlus, holds a brand trust score of 59/100.

What are the ingredients in NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor?

NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor contains 24 active ingredients: Vitamin D3 (20 mcg), Calcium (300 mg), Iron (4.5 mg), Potassium (100 mg), Vitamin A (5000 IU) (1500 mcg RAE), Vitamin C (90 mg), and 18 more. Notable high-dose ingredients include Biotin at 1000% DV, Manganese at 220% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor safe to take?

NaturesPlus SPIRU-TEIN Plant-Based Protein Shake, Banana Flavor has been analyzed for ingredient safety across all its components. Of 36 inactive ingredients, 14 are rated safe. 1 ingredient is flagged for review: Ferrous Fumarate. '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 NaturesPlus a trustworthy supplement brand?

NaturesPlus receives a brand trust score of 59/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1972 and headquartered in Melville, New York, United States, the company offers 420 products in their lineup. Note: NaturesPlus has 1 historical regulatory incident 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.