Extra Strength Hair, Skin & Nails

product on market Softgel Capsule Nature's Bounty Optimal Solutions 🟢 Safety: 99/100
Brand: Nature's Bounty Optimal Solutions
🟢 99/100

This product looks safe

  • Folate: 333mg is 333.0× the Tolerable Upper Intake Level (1.0mg)
  • 52% of ingredients have research evidence
C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Folate: 333mg is 333.0× the Tolerable Upper Intake Level (1.0mg)

Label Data

3 Softgel(s) Serving Size
10 Servings
Other Combinations Product Type
52% Evidence Coverage

Supplement Facts — Evidence Check

Calories
15 Calorie(s)
Total Fat
1 Gram(s) (1% DV)
Vitamin A
1500 mcg (167% DV)
Vitamin C
60 mg (67% DV)
20 mcg (100% DV)
✅ 1.3× RDA — within safe limits 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.02mg UL 0.1mg
10 mg (67% DV)
✅ Within RDA (0.7× RDA of 15 mg) 📚 177 studies (Tier A: 3, B: 90)
RDA 15mg This product: 10mg UL 1000mg
3 mg (250% DV)
✅ 2.5× RDA — within safe limits 📚 76 studies (Tier A: 0, B: 33)
RDA 1.2mg This product: 3mg
5 mg (385% DV)
📊 3.8× RDA — above typical dose 📚 12 studies (Tier A: 0, B: 1)
RDA 1.3mg This product: 5mg
25 mg (156% DV)
✅ 1.8× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 25mg UL 35mg
5 mg (294% DV)
📊 3.8× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 5mg UL 100mg
333 mcg DFE (83% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 333.0× (UL: 1.0 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 333mg UL 1.0mg
8 mcg (333% DV)
📊 3.3× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.008mg
5000 mcg (16667% DV)
📊 166.7× RDA — above typical dose 📚 26 studies (Tier A: 0, B: 11)
RDA 0.03mg This product: 5.0mg
4 mg (80% DV)
✅ Within RDA (0.8× RDA of 5 mg) 📚 1 studies — no high-quality reviews
RDA 5mg This product: 4mg
Iron
3 mg (17% DV)
7.5 mg (68% DV)
✅ Within RDA (0.7× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 7.5mg UL 40mg
12.5 mcg (23% DV)
✅ Within RDA (0.2× RDA of 0.055 mg) 📚 172 studies (Tier A: 0, B: 67)
RDA 0.055mg This product: 0.0125mg UL 0.4mg
5 mg (217% DV)
✅ 2.2× RDA — within safe limits 📚 8 studies — no high-quality reviews
RDA 2.3mg This product: 5mg UL 11mg
Argan Oil
25 mg
10 mg
📊 Market median: 500.0mg (9 products)
This product: 10mg
10 mg
📊 Market median: 125.0mg (294 products) 📚 36 studies (Tier A: 1, B: 7)
RDA 550mg This product: 10mg UL 3500mg
10 mg
📊 Market median: 200.0mg (198 products) 📚 6 studies — no high-quality reviews
This product: 10mg
Horsetail
3 mg
50 mg
📊 Market median: 20.0mg (931 products) 📚 233 studies (Tier A: 1, B: 90)
This product: 50mg
30 mg
📊 Market median: 100.0mg (173 products)
Median 100.0mg This product: 30mg

Other Ingredients

Soybean Oil Gelatin Vegetable Glycerin Soy Lecithin Contains less than 2% of

Label Claims — Verification

❓ Nutrient
❓ All Other
All Other (99% of products) Structure/Function (76% of products) Nutrient (58% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Directions: For adults, take three (3) softgels daily, preferably with a meal.

⚠️ Warnings & Precautions

Contains soy and tree nut (argan) ingredients.

Warning: If you are pregnant, nursing, taking any medications, planning any medical or surgical procedure, have any medical condition, or are planning to undergo any clinical lab testing, consult your doctor before use. Some supplements may interact with certain medications and/or interfere with certain lab tests.

Avoid this product if you are allergic to yeast.

It is advisable to consult your doctor before using biotin doses above 2,500 mcg per day. If any adverse reactions occur, stop use and consult your doctor.

Not intended for use by persons under the age of 18.

Do not use if seal under cap is broken or missing.

Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six. Keep this product out of reach of children. In case of accidental overdose, call a doctor or Poison Control Center immediately.

🧪 Formulation Notes

Argan oil infused

With Biotin 5000 mcg per serving Antioxidants C & E Plus Hyaluronic Acid

Guaranteed Quality Laboratory Tested

Non-GMO. No artificial flavor, no sugar, no starch, no milk, no lactose, no gluten, no wheat, no fish.

Made In The USA with select ingredients from around the world

Additional Information

#1 Brand for hair, skin & nails

Health & Beauty

Store at room temperature.

Beauty starts on the inside At Nature’s Bounty, we believe health and beauty go hand in hand. With nearly 50 years of making quality vitamins and more than 20 years in the beauty business, you can trust that every Nature’s Bounty product is backed by science, and made with the purest ingredients...guaranteed. Beauty Starts on the Inside.

IRI Total US-Multi Outlet: Latest 52 weeks ending 7/26/20.

Nutrition Questions or Comments? Call 1-800-433-2990 Mon. - Sat. 9 AM - 7 PM ET Sign Up for News and Offers at NaturesBounty.com

Product Details

DSLD Entry Date 2021-02-25
Product Type Other Combinations
Form Softgel Capsule
Brand Nature's Bounty Optimal Solutions
DSLD ID 242553
Data Updated 2026-04-11

Research Evidence

337 Research Sources
54 Avg Quality Score
161 Meta Analysis
68 Systematic Review
51 Rct
48 Clinical Trial
2 Other
2 Regulatory Source
1 Narrative Review
1 Cochrane Review
1 Guideline
1 Openfda Safety
A Vitamin A supplementation for preventing morbidity and mortality in children from six months to five years of age
Meta Analysis The Cochrane database of systematic reviews 2017
PubMed DOI Cochrane
A Vitamin A supplementation for the prevention of morbidity and mortality in infants six months of age or less
Meta Analysis The Cochrane database of systematic reviews 2011
PubMed DOI Cochrane
A Vitamin A supplementation for reducing the risk of mother-to-child transmission of HIV infection
Meta Analysis The Cochrane database of systematic reviews 2011
PubMed DOI Cochrane
A Vitamin A supplements for preventing mortality, illness, and blindness in children aged under 5: systematic review and meta-analysis
Meta Analysis BMJ (Clinical research ed.) 2011
PubMed DOI
A Fortification of staple foods with vitamin A for vitamin A deficiency
Systematic Review The Cochrane database of systematic reviews 2019
PubMed DOI Cochrane
A Vitamin A supplementation for the prevention of morbidity and mortality in infants one to six months of age
Narrative Review The Cochrane database of systematic reviews 2016
PubMed DOI Cochrane
A Vitamin A and fish oils for preventing the progression of retinitis pigmentosa
Meta Analysis The Cochrane database of systematic reviews 2020
PubMed DOI
A Exercise training-induced changes in exerkine concentrations may be relevant to the metabolic control of type 2 diabetes mellitus patients: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Journal of sport and health science 2023
PubMed DOI
A Food fortification with multiple micronutrients: impact on health outcomes in general population
Meta Analysis The Cochrane database of systematic reviews 2019
PubMed DOI
A Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age
Meta Analysis The Cochrane database of systematic reviews 2024
PubMed DOI
View all evidence for Vitamin A →

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