Comprehensive Lab Testing Results for Maseca Instant Corn Masa Flour and More

by

A Detailed Report on Maseca Instant Corn Masa Flour & Other Safe Consumer Products

Published on March 30, 2025 — Sunday

A Personal Message from Tamara Rubin:

This Maseca Instant Corn Masa Flour product has been nominated for independent laboratory testing by families who rely on it as a staple in Latin-American cooking. I am pleased to share the results, which indicate trace levels of Arsenic—levels so minuscule that they are deemed safe by all existing standards. Please review the full laboratory report below for detailed insights. You can find this product on our affiliate link: https://amzn.to/4iR8qWN.

This product now ranks #68 on our “Safer Choices” list!

Interestingly, this is yet another product we have tested that demonstrates a cleaner profile compared to many tested to date, despite not being produced or cultivated in the United States. Our testing data, encompassing over 350 products, suggests that heavy metal contamination is more prevalent in crops grown within the U.S. than in other countries. This pattern highlights the importance of scrutinizing the origin of food products for safer consumption.

Access the Full Lab Report

The comprehensive lab report for this product is located at the bottom of this article, providing transparency and detailed analysis.

Helpful Resources for Safer Food, Supplements, and Cosmetics

We offer several curated lists on our food and supplement testing landing page, designed to help you make safer choices for your family. These include lists dedicated to safer snacks and a regularly updated compilation of 67 tested products across foods, cosmetics, and supplements. Bookmark this page for ongoing updates, as it is pinned at the top of the website menu for easy access.

Support Our Independent Testing Efforts

If you wish to contribute to our ongoing work, please consider supporting our crowd-funded initiatives on GoFundMe. Your support helps sustain the independent, third-party laboratory testing that is critical for consumer awareness and safety.

About Tamara Rubin and Lead Safe Mama, LLC

  • Tamara Rubin is an award-winning advocate dedicated to childhood Lead poisoning prevention and consumer product safety. She is also a documentary filmmaker and mother of children affected by Lead poisoning, with two of her four sons acutely Lead-poisoned in 2005.
  • Lead Safe Mama, LLC is a woman-owned small business focused on community-based efforts to prevent Lead exposure and improve consumer goods safety.
  • Since July 2022, our testing has contributed to six product recalls by FDA and CPSC authorities.
  • All results shared are based on rigorous, science-backed, and replicable analyses.
  • Visit our press page to see media coverage of our work.

This article is ad-free to enhance your reading experience.

Support our mission by shopping through our affiliate links or making a donation, which helps us maintain an independent, ad-free platform dedicated to consumer safety and Lead poisoning prevention.

Expanded List of Tested Safe Products

Below is a continually expanding list of foods, supplements, and cosmetics that have tested non-detect for Lead, Mercury, Cadmium, and Arsenic through independent, third-party testing coordinated by Lead Safe Mama, LLC. Each entry includes the detection limits and links to original lab reports for full transparency. Please note that flavors and product variants may differ in test results; always verify specific products.

Updated as of March 30, 2025 – 62 products listed:

  1. Baby Food — 1 — Little Spoon Kale, Carrot + Pear BabyBlends
  2. Baby Food — 2 — Little Spoon Butternut Squash + Blueberry BabyBlends
  3. Baby Food — 3 — Little Spoon Sweet Potato BabyBlends
  4. Baby Food — 4 — Little Spoon Sweet Potato + Carrot BabyBlends
  5. Baby Food — 5 — Little Spoon Banana + Pitaya BabyBlends
  6. Beverage — 1 — Honest Kids Organic Appley Ever After Apple Juice Drink: https://amzn.to/4fjGhov
  7. Beverage — 2 — Olipop Grape Tonic: https://amzn.to/4cjFYZu
  8. Breakfast Item — 1 — Nature’s Path Envirokidz Organic Panda Puffs: https://amzn.to/4fo1crf
  9. #1 NEW! Breakfast Item — 2 — Nature’s Path Envirokidz Organic Corn Puffs Gorilla Munch: https://amzn.to/3FHZCDO
  10. Breakfast Item — 2 — One Degree Organic, Gluten-Free, Sprouted Rolled Oats (Canada): https://amzn.to/3WIQ1BN
  11. Candy — Lindt White Chocolate Bar (Made in USA, New Hampshire): https://amzn.to/3OXkyIm
  12. Candy — Cavendish & Harvey Wild Berry Drops, not organic (Germany): https://amzn.to/3Z1Jxjr
  13. Coffee & Tea — 1 — Chameleon Handcrafted Organic Cold Brew Concentrate: https://amzn.to/3OcrH77
  14. Coffee & Tea — 2 — Tao of Tea Organic Genmaicha: https://amzn.to/3Dp8Fsd
  15. Coffee & Tea — 3 — Califia Farms Almond Latte Cold Brew (XX Espresso): https://amzn.to/4gTTGoJ
  16. Coffee & Tea — 4 — Death Wish Organic Espresso Roast Ground Coffee: https://amzn.to/3yo1eiL
  17. Coffee Creamer — Plant-Based — 1 — Laird Superfood Coconut Creamer: https://amzn.to/4fItA7A
  18. Coffee Creamer — Dairy — 2 — Organic Valley Grassmilk Half and Half: https://amzn.to/4fHJIWT
  19. Dairy, Cheese — Babybel Mini Original Snack Cheese: https://amzn.to/3ZY5noO
  20. Fruit Snack — 1 — GoGo Squeez Organic Apple Sauce Pouch: https://amzn.to/3XhWYLe
  21. Fruit Snack — 2 — Costco’s Kirkland Organic Apple Sauce Pouch: https://amzn.to/4gOYpZ9
  22. Fruit Snack — 3 — Pure Organic Layered Fruit Bars in Strawberry Banana Flavor: https://amzn.to/3WQEekA
  23. Fruit Snack — 4 — Once Upon A Farm Dairy-Free Fruit Smoothie Pouch in Strawberry Banana Swirl Flavor: https://amzn.to/3CPMbAw
  24. Fruit Snack — 5 — Pure Organic Layered Fruit Bars in Raspberry Lemonade Flavor: https://amzn.to/3XcFsIp
  25. Infant Formula — 1 — Bobbie Organic Gentle Infant Formula Milk-Based Powder with Iron: https://amzn.to/3YYb849
  26. Infant Formula — 2 — Bobbie Organic Infant Formula Milk-Based Powder with Iron: https://amzn.to/3VOr4Vy
  27. Infant Formula — 3 — Bobbie Grass-Fed Milk-Based Powder with Iron: https://amzn.to/3ZlAaeJ
  28. Infant Formula — 4 — ByHeart Infant Formula (USA-made, not organic): https://amzn.to/48DJjTb
  29. Infant Formula — 5 — HiPP Bio Combiotik Infant Formula Powder, Stage 1: https://amzn.to/3BVU7zI
  30. Infant Formula — 6 — HiPP HA Stage PRE (0+ Months) Combiotic Formula: https://amzn.to/3ZlAaeJ
  31. Infant Formula — 7 — Holle Bio Goat Stage 2 Infant Formula (European, Swiss/German/Austrian): https://amzn.to/3BVU7zI
  32. Infant Formula — 8 — Kendamil Goat Infant Formula (non-organic): available at Target or select retailers
  33. Infant Formula — 9 — Kendamil Organic Follow-On Milk (UK, Cow Milk): Not available on Amazon
  34. Infant Formula — 10 — Kendamil Whole Milk Infant Formula (Europe, Pink Can): Available at Target
  35. Infant Formula — 11 — Kendamil Organic Cow Milk Infant Formula: Available at Target or specialty stores
  36. Ingredient — 1 (Salt) — Jacobsen’s Sea Salt (Oregon, USA): https://amzn.to/4dcbk5L
  37. #2 NEW! Ingredient — 1 (Salt) — Maldon Sea Salt Flakes: https://amzn.to/4iTzWTE
  38. Ingredient — 2 (Baking Flour) — Jovial Organic Einkorn Flour (Italy): https://amzn.to/3LIqxix
  39. Ingredient — 4 (Seeds) — Costco Kirkland Organic Hemp Seeds: https://amzn.to/4e05RP9
  40. Ingredient — 5 (Seeds) — Navitas Organic, Gluten-Free Chia Seeds (Mexico): https://amzn.to/3YvE7xC
  41. Ingredient — 6 (Vinegar) — Napa Valley Naturals Organic Red Wine Vinegar (California): https://amzn.to/4jWhHOg
  42. Ingredient — 7 (Beans) — Jovial Organic Chickpeas, Product of Italy: https://amzn.to/4iRON1l
  43. #3 NEW! Ingredient — 7 (Sugar) — Anthony’s Organic Granulated Cane Sugar: https://amzn.to/4jf6vLv
  44. Oil — 1 — Chosen Foods 100% Avocado Oil (not organic): https://amzn.to/3YDZSuv
  45. Oil — 2 — Dr. Adorable’s Organic Perilla Seed Oil (Korea): https://amzn.to/3NDt7Yc
  46. Oil — 3 — Dr. Bronner’s Regenerative Organic Coconut Oil: https://amzn.to/40xwBmv
  47. Plant-Based Milk — 1 — Kiki Milk Organic Plant-Based Milk (original flavor): https://amzn.to/3AA6Qrt
  48. Plant-Based Milk — 2 — West Soy Unflavored Unsweetened Organic Soy Milk: https://amzn.to/4dwev8l
  49. Supplement — 1 — Baby Ddrops Organic Vitamin D3 Supplement for Babies: https://amzn.to/49C3ktH
  50. Supplement — 2 — Doctor’s Best Vitamin C with Q-C: https://amzn.to/4hlVvea
  51. Supplement — 3 — Mary Ruth’s Organic Toddler Multivitamin Liquid Drops with Iron: https://amzn.to/3YPhcgx
  52. #4 NEW! Supplement — 4 — Mary Ruth’s Organic Toddler Elderberry Liquid Drops: https://amzn.to/42617TU
  53. Supplement — 5 — Nordic Naturals Omega-3 Fish Oil: https://amzn.to/48q1j2V
  54. #5 NEW! Supplement — 6 — Nordic Naturals Kids Vitamin D3 Gummies (Ages 3+): https://amzn.to/4l7117a
  55. #6 NEW! Supplement — 7 — Pectasol Modified Citrus Pectin: https://amzn.to/3QUmZfN
  56. Supplement — 8 — Pendulum Metabolic Daily Dietary Supplement: https://amzn.to/4gY5wOm
  57. Cosmetic — 1 — Kora Organics Noni Face Oil: https://amzn.to/43hy2XO
  58. Cosmetic — 2 — Fluoride-free Toothpaste! — Orajel Kids Training Toothpaste in Natural Berry Fruity Flavor, Elmo Sesame Street Packaging: https://amzn.to/41wxtrY
  59. Cosmetic — 3 — Fluoride-free Toothpaste! — Miessence Mint Toothpaste: https://amzn.to/4bJc4PO
  60. Cosmetic — 4 — Fluoride-free Toothpaste! — Dr. Brown’s Fluoride-free Baby Toothpaste in Strawberry Flavor: https://amzn.to/3DCehzZ
  61. Cosmetic — 5 — Low-Fluoride Toothpaste! — Pegciz Kids Foam Toothpaste in Watermelon Flavor: https://amzn.to/3RgKEXV
  62. Cosmetic — 6 — Fluoride-free Toothpaste! — Kid’s Spry Tooth Gel with Xylitol in Original Flavor: https://amzn.to/41GZb4e

Pending/Upcoming Lab Reports

Note: Some results are still pending or have not yet been published as of March 30, 2025. For a comprehensive list of all laboratory reports, including those not yet available, visit our dedicated page: https://tamararubin.com/2024/05/food-articles/.

Additional Products with Trace Arsenic Levels

Below are six additional products that tested positive for very low levels of Arsenic — levels considered safe by all standards, with detection limits specified in their respective lab reports:

  1. Ingredient — Corn Flour — Maseca — Product of Mexico: https://amzn.to/4iR8qWN
  2. Infant Formula — Kendamil Goat Toddler Milk (Non-organic, positive for traces of Arsenic) — Available at Target or other European formula retailers
  3. Fruit Snack — That’s It Apple Cherry Bars (Non-organic, positive for traces of Arsenic): https://amzn.to/4fHkSWV
  4. Oil — Chosen Foods 100% Pure Avocado Oil (Organic, positive for traces of Arsenic): https://amzn.to/3BVQYQa
  5. Supplement — Now Sunflower Lecithin (Non-organic, positive for traces of Arsenic): https://amzn.to/3AFdHzO
  6. Supplement — WishGarden Immune Boost Seasonal Rescue for Pregnancy: https://amzn.to/3Cd940N

Important Notes

All Amazon links provided are affiliate links. If you choose to purchase through these links, Lead Safe Mama, LLC may receive a small commission at no extra cost to you.

Access Full Lab Reports

For detailed lab reports for all tested products, including those listed above, please visit: https://tamararubin.com/2024/05/food-articles/.

Stay Updated

We are committed to ongoing testing and reporting. Check back regularly for new updates and additional product insights. Your support enables us to continue this vital work in safeguarding consumer health and preventing childhood Lead poisoning.

Leave a Comment