Just ran this price comparison for sources of resistant starch:
Sourcing Analysis: Resistant Starch (RS2) Powders
Executive Summary:
The most cost-effective sources for Resistant Starch (RS2) in consumer sizes (<2kg) are Unmodified Potato Starch and Green Banana Flour.
- Cost Efficiency: Unmodified Potato Starch is significantly cheaper (approx. $0.80–$1.00 per 100g) than Green Banana Flour ($1.00–$1.50 per 100g) or branded Maize starch ($1.60+ per 100g).
- Verification: All listed items have been verified as currently in stock and available for shipping within the USA.
- RS2 Content Note: Unmodified Potato Starch is widely considered the most concentrated source of RS2 (approx. 60–70% by weight) when consumed raw/unheated. Green Banana Flour typically contains 40–50% RS2.
Top 10 Lowest-Cost Sources (Sorted by Cost Per 100g of Powder)
| Rank | Product/Brand Name | Vendor | Total Weight | Total Price (USD) | Cost Per 100g Powder |
|---|---|---|---|---|---|
| 1 | Bob’s Red Mill Unmodified Potato Starch | Ocean State Job Lot | 22 oz (623 g) | $4.99 | $0.80 |
| 2 | Bob’s Red Mill Unmodified Potato Starch | iHerb | 22 oz (623 g) | $5.24 | $0.84 |
| 3 | Hokuren Katakuriko (Potato Starch) | Hanamaru Market | 12 oz (340 g) | $3.25 | $0.96 |
| 4 | Green Banana Powder | Rainforest Supply | 1.5 lbs (680 g) | $6.99 | $1.03 |
| 5 | Potato Starch (Unmodified) | BulkFoods.com | 1 lb (454 g) | $6.29 | $1.38 |
| 6 | Let’s Do Organic Green Banana Flour | iHerb | 14 oz (396 g) | $5.86 | $1.48 |
| 7 | Hi-Maize 260 Resistant Starch | eBay (Ingredion) | 2.2 lbs (1000 g) | $15.90 | $1.59 |
| 8 | Anthony’s Organic Potato Starch | Anthony’s Goods | 2 lbs (907 g) | $17.09 | $1.88 |
| 9 | Frontier Co-op Organic Potato Starch | Walmart | 16 oz (453 g) | $8.67 | $1.91 |
| 10 | Plantain Flour (Gluten Free) | Kalustyan’s | 1 lb (454 g) | $8.99 | $1.98 |
Shipping & Vendor Notes:
- Ocean State Job Lot: Offers “Ship to Home” but availability can vary by region. Flat rate shipping is often around $9–$12 depending on cart size.
- iHerb: Best Value on Shipping. Free shipping is typically available on orders over $30–$40.
- Rainforest Supply: Flat rate shipping is approximately $9.99 (may vary by location).
- Hanamaru Market: Calculates shipping at checkout; specializes in Japanese goods (Katakuriko is 100% potato starch).
- eBay (Hi-Maize): The listed item has a separate shipping charge of ~$8.65.
- BulkFoods.com: Shipping is calculated by weight/location; free shipping often requires a $75+ minimum.