Thorne

Undecylenic Acid (formerly Formula SF722), 250 Softgels

Size: 250 Softgels

4.8 across 7 sources

May be a fit for

  • Adults seeking undecylenic acid to support healthy gut flora balance
  • Individuals managing yeast overgrowth concerns through practitioner-guided protocols
  • Those supporting gastrointestinal microbial balance with a fatty acid compound
$48.99

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SoftgelsFormat
250 SoftgelsPack size
The essentials

A closer look.

Thorne's Undecylenic Acid (formerly Formula SF722) delivers 250 mg of undecylenic acid per softgel, a naturally derived fatty acid from castor oil, formulated to support a balanced intestinal environment and healthy microbial balance in the GI tract. This longstanding Thorne formula is a go-to for practitioners and health-conscious individuals seeking targeted gut-flora support.

Why It's Worth Considering: Undecylenic acid in a softgel delivery format supports absorption of this lipid-soluble compound, and the 250-softgel count makes it practical for extended protocols. Thorne's manufacturing standards align with NSF certification requirements, a detail clinically oriented users tend to prioritize.

The Apotheca perspective

50+ signals. A clearer standard.

Our curation and trust scoring bring together manufacturing, testing, research, practitioner insight and reviews from across the web.

94OUT OF 100
Manufacturing8383
Lab verification7373
Transparency6565

Our score is an editorial assessment, not a product certification or a guarantee of results.

Inside the formula

Product details

Who it may suit

May be a fit for

  • Adults seeking undecylenic acid to support healthy gut flora balance
  • Individuals managing yeast overgrowth concerns through practitioner-guided protocols
  • Those supporting gastrointestinal microbial balance with a fatty acid compound
  • Practitioners protocols requiring undecylenic acid for long-term microbiome maintenance

Considerations

  • Known allergy to any ingredient (check label)
  • Currently pregnant or breastfeeding (consult healthcare provider)
  • Taking prescription medications (check for interactions)
  • Under 18 years of age (unless recommended by pediatrician)
From across the web

Real reviews. A wider perspective.

Customer reviews, social conversations and expert insights, with every source in view.

4.8/5Aggregate source rating
Marketplaces & brand websites
Amazon, iHerb and direct brand reviews
Social & community
Reddit, X, Instagram and TikTok
Video & creators
YouTube and creator perspectives

Coverage varies by product and brand.

6100 product and brand ratings and mentions across 7 sources.

Explore the source sentiment summary

Thorne brand sentiment is largely negative following PE acquisition, COA refusal, and counterfeit concerns, despite some affiliate endorsements.

This summary includes broader brand discussion. Individual experiences are not evidence of product effectiveness.

Good to know

A few useful answers.

Research & further reading

More category questions

How should I store this supplement?

Store in a cool, dry place away from direct sunlight. Most supplements are stable at room temperature (59-77°F). Keep the bottle sealed between uses. Check the label for any specific storage requirements — some probiotics and oils require refrigeration.

Can I take this with other supplements?

Most supplements can be taken together safely. However, some minerals compete for absorption (zinc and iron, calcium and magnesium) and should be taken at different times of day. If you're taking prescription medications, consult your healthcare provider about potential interactions.

How long should I take this supplement?

Most supplements benefit from consistent daily use over 2-3 months to achieve full effect. Some (like vitamins and minerals) can be taken indefinitely as part of a daily routine. Others (like specific herbs) may benefit from cycling. Follow the product's recommended protocol or consult a practitioner.

When is the best time to take this?

Fat-soluble supplements (vitamins A, D, E, K, omega-3, CoQ10) should be taken with a meal containing fat. Water-soluble supplements (B vitamins, vitamin C) can be taken anytime. Minerals are generally best absorbed with food. Probiotics should be taken with or just before a meal. Check the product label for specific timing recommendations.

How do I know if this supplement is working?

Track your specific health goals — energy levels, sleep quality, joint comfort, digestion, mood, etc. Most supplements take 2-8 weeks for noticeable effects. For objective measurement, baseline lab tests before starting (and repeat at 3 months) provide definitive evidence. The Gabriel Score incorporates clinical evidence for expected outcomes.

Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.

Thorne - Undecylenic Acid (formerly Formula SF722), 250 Softgels Thorne

Apotheca quality score

94/100

The overall score combines several sources of information. The individual dimensions below show where those signals are stronger or more limited; they are not a simple average of the overall score.

Manufacturing8383
Lab verification7373
Review consensus100100
Practitioner signals66.066.0
Community signals6464
Transparency6565
See available brand signals
✓
Good manufacturing practices verifiedStandard
✓
Quality ingredients with verified sourcingGood
✓
Clean FDA regulatory recordNo issues
✓
Positive consumer reviews and community feedbackGood
✓
Authorized distribution channel verifiedDirect

Our score is an editorial assessment, not a product certification or a guarantee of results.

How our scoring works ↗