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Fiber w/Lactoferrin - Daily Gut Support Formula (30 Day) -

Regular price $43.00
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Your daily gut optimization


Built specifically for athletes who lose races to their gut. With a better gut, you absorb more of every calorie you take in — and that changes everything from hour two onward.

Over 60% of endurance athletes experience GI problems during training and racing. 44% say it has directly hurt their race performance. There is a way to change that.

The GI-Distress Veteran

You've had at least one race go sideways because of your gut — nausea, cramping, or the wrong kind of urgency at mile 18. You've dialed your training, your gear, your taper. Your gut is the last variable. This is how you fix it.

The Race-Block Builder

You're 4–12 weeks out from a target race, and you want to arrive with a gut that can actually handle the fuel load you're planning. Start now. The work you do in the weeks before the race is what shows up on race day.

The Everyday Optimizer

You train hard and take your nutrition seriously — that's why you chose Spring in the first place. This ensures your body is absorbing everything you're putting into it every day, not just when it counts.

Your gut is the system that delivers every calorie you train on. Keep it running.

During sustained exercise, blood flow diverts away from the gut. The lining becomes more vulnerable to osmotic stress — especially when fueling with fast carbohydrates. The result is the bloating, cramping, and GI distress that costs athletes miles and race-day confidence.

This formula addresses the underlying physiology. Oat beta-glucan, green banana powder, acacia, and psyllium husk provide soluble fiber that supports microbial diversity and butyrate production — key factors in maintaining intestinal barrier integrity.

Lactoferrin, a bioactive protein found naturally in colostrum, supports mucosal immune function and helps regulate inflammatory response in the gut lining. Sunflower lecithin reinforces the mucous membrane layer that protects the gut wall during exercise-induced stress. Ginger powder supports gastric motility, so food and fluids clear the stomach efficiently. Supergreens and Vitamin C round out the formula with antioxidant support for recovery.

This works through consistency, not acuity. Start 4–6 weeks before your target race. Your gut on race day reflects the work you put in the weeks before.

Better carbohydrate uptake during long efforts

A healthy gut absorbs glucose more efficiently. Research shows that microbial diversity and barrier integrity directly affect how well carbohydrates cross into circulation. More absorbed fuel means more available energy at hour three and beyond.

Reduced GI distress on race day

Lactoferrin supports immune and inflammatory regulation in the gut lining. Soluble fiber from oat beta-glucan and acacia feeds beneficial bacteria that produce short-chain fatty acids — compounds that maintain barrier function under physiological stress.

A gut that recovers as fast as your legs

Lactoferrin has been studied for its role in reducing intestinal permeability and supporting mucosal regeneration after hard efforts. Combined with Vitamin C and supergreens, this formula helps the gut repair the same way targeted recovery nutrition helps muscles.

What athletes notice, and when

Most athletes want to know what to expect before committing to a daily supplement. Here's the honest timeline:

When What changes
Week 1–2 Less bloating, more predictable digestion around training sessions
Week 3–4 Quieter gut during long runs — less mid-effort urgency and discomfort
Week 5–6 Better fuel tolerance, improved energy from carbohydrates during efforts
Race day A gut that's been trained to handle the load — not one you're hoping will cooperate

Results build through consistent daily use. Most athletes notice a meaningful difference in GI tolerance within two to four weeks.

Spring gels and meals work because of what's in them — real food your body recognizes and processes cleanly. This product makes sure your body is ready to work with them.

A compromised gut absorbs fewer carbohydrates from every gel it receives. A healthy gut absorbs more. You're not just adding a supplement — you're making every Spring product you already use perform better.

Spring Performance Kit — Gels + Fiber + Lactoferrin — fuel and the system that runs it. Save 15%.


Every ingredient in this formula has a specific mechanical job. Here's what each one does and why it's here.

  • Oat Beta-Glucan — supports microbial diversity and butyrate production, which maintain the gut barrier and modulate inflammation.
  • Green Banana Powder — provides resistant starch, a prebiotic that selectively feeds beneficial bacteria in the colon.
  • Acacia Powder — a slow-fermenting soluble fiber that feeds microbiota without the bloating associated with faster-fermenting fibers.
  • Psyllium Husk — supports intestinal transit regularity and acts as a prebiotic substrate.
  • Sunflower Lecithin — reinforces the phospholipid layer of the intestinal mucosa, supporting barrier integrity under exercise stress.
  • Lactoferrin — a bioactive glycoprotein that supports mucosal immune function, modulates gut inflammation, and has been studied for its role in reducing intestinal permeability.
  • Ginger Powder — supports gastric motility and reduces exercise-associated nausea.
  • Supergreens — provide micronutrients and antioxidant compounds that support recovery.
  • Vitamin C — supports tissue repair and acts as an antioxidant at the mucosal level.
New to fiber supplements? Start with half a serving for the first 5–7 days. Your microbiota adjusts over time — some gas or bloating in week one is normal and resolves with consistency.

Mix one teaspoon with 12–16 oz of your drink of choice.

Take once daily, ideally 1–2 hours after dinner.

The gut does its most significant repair work during sleep. Intestinal cell turnover, mucosal regeneration, and microbial fermentation of prebiotic fiber all increase during rest, when blood flow returns to the gut and the body isn't managing exercise demands. Taking this formula in the evening gives your microbiota the substrates it needs during that repair window.

Lactoferrin is also more effective when taken away from heavy food intake. An evening dose means less competition from dietary proteins for mucosal uptake.

Nutrition facts

Nutrition Facts
Serving Size 1 Scoop (11g)
Servings Per Container 27
Calories 25
% Daily Value*
Total Fat 0g0%
Cholesterol 0mg0%
Sodium 0mg0%
Potassium 0mg0%
Total Carbohydrates 7g3%
Dietary Fiber 7g25%
Soluble Fiber 6g
Insoluble Fiber 1g
Sugars 0g
Protein 0g0%
Lactoferrin 300mg **
Viscous Fiber Matrix 7.0g **
Psyllium Husk
Oat Beta Glucan (Oat Fiber)
Acacia Fiber
Resistant Starch Blend 2.0g **
Green Banana Powder
Digestive Support Blend 1.4g **
Super Greens Blend
Ginger Powder
Sunflower Lecithin
Vitamin A 0% • Vitamin C 100mg 111% • Calcium 0% • Iron 0%
* Percent Daily Values are based on a 2,000 calorie diet. ** Daily Value not established.

INGREDIENTS: Acacia Powder, Oat Beta Glucan (Oat Fiber), Green Banana Powder, Psyllium Husk, Super Greens, Lactoferrin, Ginger Powder, Sunflower Lecithin, Vitamin C, Natural Flavors

STORAGE:
Store in a cool, dry place away from direct sunlight. Keep container tightly closed.
WARNINGS: Allergen - contains milk.
Consult your healthcare provider before use if you are pregnant, nursing, taking medication, or have a medical condition. Keep out of reach of children.

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