NaturesPlus Ultra-Stress Sustained Release supplement bottle
NaturesPlus

Ultra-Stress Sustained Release

What We Researched
13 active ingredients analyzed · 9 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
86
Product Score Good
59
Brand Score Poor

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbic Acid) 500 mg 556%
Thiamine (as Thiamine Hydrochloride, Vitamin B1) 125 mg 10417%
Riboflavin (as Vitamin B2) 125 mg 9615%
Niacin (as Niacinamide) 125 mg NE 781%
Vitamin B6 (as Pyridoxine Hydrochloride) 125 mg 7353%
Folate (as Calcium L-5-Methyltetrahydrofolate) 667 mcg DFE 167%
Vitamin B12 (as Methylcobalamin) 500 mcg 20833%
Biotin 125 mcg 417%
Pantothenic Acid (as Calcium Pantothenate) 200 mg 4000%
Choline (as Choline Bitartrate) 32 mg 6%
Iron (as Iron Amino Acid Chelate) 20 mg 111%
Inositol 75 mg
Para-Aminobenzoic Acid 50 mg
Bioavailability Very Good

Absorption Rating

  • Vitamin C (as Ascorbic Acid) Fair
  • Thiamine (as Thiamine Hydrochloride, Vitamin B1) Fair
  • Riboflavin (as Vitamin B2) Good
  • Niacin (as Niacinamide) Good
  • Vitamin B6 (as Pyridoxine Hydrochloride) Fair
  • Folate (as Calcium L-5-Methyltetrahydrofolate) Good
  • Vitamin B12 (as Methylcobalamin) Good
  • Biotin Good
  • Pantothenic Acid (as Calcium Pantothenate) Good
  • Choline (as Choline Bitartrate) Poor
  • Iron (as Iron Amino Acid Chelate) Fair
  • Inositol Good
  • Para-Aminobenzoic Acid Good
Other Ingredients Excellent

Fillers & Additives

  • Hydroxypropyl Methylcellulose
  • Stearic Acid
  • Microcrystalline Cellulose
  • Ferrous Fumarate Low
  • Magnesium Stearate
  • Rose Hip
  • Soy Protein Isolate
  • Rice
  • Pharmaceutical Glaze
Efficacy Good

Dosage Analysis

  • Vitamin C (as Ascorbic Acid) 500 mg Effective
  • Thiamine (as Thiamine Hydrochloride, Vitamin B1) 125 mg Effective
  • Riboflavin (as Vitamin B2) 125 mg Effective
  • Niacin (as Niacinamide) 125 mg NE High
  • Vitamin B6 (as Pyridoxine Hydrochloride) 125 mg High
  • Folate (as Calcium L-5-Methyltetrahydrofolate) 667 mcg DFE Effective
  • Vitamin B12 (as Methylcobalamin) 500 mcg Effective
  • Biotin 125 mcg Effective
  • Pantothenic Acid (as Calcium Pantothenate) 200 mg Effective
  • Choline (as Choline Bitartrate) 32 mg Under-dosed
  • Iron (as Iron Amino Acid Chelate) 20 mg Effective
  • Inositol 75 mg Under-dosed
  • Para-Aminobenzoic Acid 50 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbic Acid) 500 mg 556%
Thiamine (as Thiamine Hydrochloride, Vitamin B1) 125 mg 10417%
Riboflavin (as Vitamin B2) 125 mg 9615%
Niacin (as Niacinamide) 125 mg NE 781%
Vitamin B6 (as Pyridoxine Hydrochloride) 125 mg 7353%
Folate (as Calcium L-5-Methyltetrahydrofolate) 667 mcg DFE 167%
Vitamin B12 (as Methylcobalamin) 500 mcg 20833%
Biotin 125 mcg 417%
Pantothenic Acid (as Calcium Pantothenate) 200 mg 4000%
Choline (as Choline Bitartrate) 32 mg 6%
Iron (as Iron Amino Acid Chelate) 20 mg 111%
Inositol 75 mg
Para-Aminobenzoic Acid 50 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hydroxypropyl Methylcellulose Safe

It is used as a coating for tablets and capsules.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Microcrystalline Cellulose Safe

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

Ferrous Fumarate Caution

It is used to supplement iron intake.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Rose Hip Unknown
Soy Protein Isolate Generally_safe

It is used as a filler to increase the bulk of a supplement.

Rice Unknown
Pharmaceutical Glaze Generally_safe

It is used to coat tablets or capsules for easier swallowing or controlled release.

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 Ultra-Stress Sustained Release a good supplement?

NaturesPlus Ultra-Stress Sustained Release received a product quality score of 86/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 13 active ingredients with 90 servings per container. Of the 9 inactive ingredients, 4 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 Ultra-Stress Sustained Release?

NaturesPlus Ultra-Stress Sustained Release contains 13 active ingredients: Vitamin C (as Ascorbic Acid) (500 mg), Thiamine (as Thiamine Hydrochloride, Vitamin B1) (125 mg), Riboflavin (as Vitamin B2) (125 mg), Niacin (as Niacinamide) (125 mg NE), Vitamin B6 (as Pyridoxine Hydrochloride) (125 mg), Folate (as Calcium L-5-Methyltetrahydrofolate) (667 mcg DFE), and 7 more. Notable high-dose ingredients include Vitamin C at 556% DV, Thiamine at 10417% DV, Riboflavin at 9615% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NaturesPlus Ultra-Stress Sustained Release safe to take?

NaturesPlus Ultra-Stress Sustained Release has been analyzed for ingredient safety across all its components. Of 9 inactive ingredients, 4 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.