Probiotic supplements vary enormously in quality — from single-strain products with minimal evidence to multi-strain, high-CFU formulas backed by robust research. Lily & Loaf Pre+Pro 15 (also called Daily Flora) sits firmly in the latter category: 15 distinct probiotic strains, 15 billion CFU per serving, prebiotic FOS fibre to nourish the bacteria, and B vitamins for energy metabolism. For people undergoing significant dietary change — through a calorie deficit, GLP-1 medication, or post-surgery recovery — gut health support is not a luxury.
What is Pre+Pro 15?
Pre+Pro 15 is Lily & Loaf’s combination prebiotic and probiotic supplement. The “Pre” refers to fructo-oligosaccharides (FOS) — a plant-based prebiotic fibre that nourishes beneficial gut bacteria. The “Pro” refers to 15 specific probiotic strains providing 15 billion colony-forming units (CFU) per serving. B vitamins (B1, B2, B6, B12) are included to support normal energy metabolism and nervous system function.
The 15 probiotic strains — why diversity matters
Research consistently shows that multi-strain probiotics outperform single-strain products for both gut microbiome diversity and clinical outcomes. Different strains colonise different sections of the gut, produce different short-chain fatty acids, and interact with the immune system through different pathways. A 2019 meta-analysis of 105 randomised trials found that multi-strain probiotics produced greater improvements in metabolic markers than single-strain formulas across the same study period.
| Strain type included | Key function | Evidence for |
|---|---|---|
| Lactobacillus acidophilus | Digestive balance, lactic acid production | IBS symptoms, vaginal health, immune modulation |
| Lactobacillus rhamnosus | Gut barrier integrity, immune regulation | Weight management in women, diarrhoea prevention |
| Lactobacillus gasseri | Visceral fat reduction, metabolic health | Reduced belly fat in clinical trials |
| Bifidobacterium lactis | Bowel regularity, immune function | Constipation, metabolic health markers |
| Bifidobacterium longum | Stress reduction, gut-brain axis | Anxiety, IBS, intestinal permeability |
| + 10 additional strains | Comprehensive microbiome coverage | Broad spectrum gut and immune support |
Who benefits most from Pre+Pro 15?
- GLP-1 medication users: GLP-1 slows gut motility, which can cause constipation and dysbiosis (microbiome imbalance). Probiotics directly support the gut motility and microbiome balance disrupted by the medication
- People after antibiotics: antibiotics indiscriminately kill gut bacteria — a broad-spectrum probiotic restores diversity
- People with IBS or digestive discomfort: several strains (particularly rhamnosus and longum) have strong evidence for IBS symptom reduction
- People losing weight: the gut microbiome influences hunger hormones (GLP-1, PYY) and metabolic rate — a healthier microbiome supports better weight management outcomes
- Frequent travellers: gut disruption from travel, different water, and dietary change is well documented — a daily probiotic provides baseline protection
- Post-gallbladder surgery: bile flow changes after cholecystectomy significantly alter gut microbiome composition; probiotic support aids the digestive adaptation
Pre+Pro 15 vs alternatives
| Product | Strains | CFU | Prebiotic | B vitamins | Price/month |
|---|---|---|---|---|---|
| Lily & Loaf Pre+Pro 15 | 15 | 15 billion | ✅ FOS | ✅ B1,B2,B6,B12 | ~£20–25 |
| Garden of Life Dr Formulated | 16 | 50 billion | ✅ Organic prebiotic | ❌ | ~£35 |
| OptiBac Every Day | 6 | 6 billion | ❌ | ❌ | ~£15 |
| Generic supermarket probiotic | 1–3 | 1–5 billion | ❌ | ❌ | ~£8 |
Pre+Pro 15 competes directly with Garden of Life at a lower price point. Garden of Life offers more CFU per serving (50 billion vs 15 billion), but research suggests that beyond a threshold CFU count the diversity and specific strains matter more than raw numbers. The inclusion of B vitamins in the L&L product adds genuine daily nutritional value that Garden of Life does not provide.
How to use it
One capsule up to three times daily with water and a meal. The “with food” instruction matters — taking probiotics alongside food provides a protective buffer that improves live culture survival through the acidic stomach environment. If starting probiotics for the first time, begin with one capsule daily for the first week to allow your gut to adjust, then increase to two or three if needed.
Lily & Loaf — Recommended Pick
Pre+Pro 15 (Daily Flora)
✅ 90-day money-back guarantee | ✅ Free UK delivery over £40 | ✅ UK-based brand
15 strains · 15 billion CFU · FOS prebiotic · B vitamins · Vegan · Gluten-free
Frequently Asked Questions
How many probiotic strains does Pre+Pro 15 have?
15 distinct probiotic strains at 15 billion CFU per serving, plus fructo-oligosaccharide (FOS) prebiotic fibre to support the beneficial bacteria.
When should I take it?
With food, up to three times daily. Morning with breakfast is the most common approach. Taking with food protects the live cultures during digestion.
Can I take probiotics on GLP-1 medication?
Yes — and it is particularly relevant on GLP-1 due to slowed gut motility. Start with one capsule daily and increase gradually. If you experience any increased bloating initially, this is normal and typically resolves within a week.
How long before I notice a difference?
Digestive changes (regularity, reduced bloating) are often noticed within 1–2 weeks. Broader metabolic and immune effects build over 4–8 weeks of consistent daily use.
Is Pre+Pro 15 the same as Daily Flora?
Yes — Pre+Pro 15 and Daily Flora refer to the same product. Daily Flora is the name used within the Daily Essentials Bundle. Pre+Pro 15 is the standalone product name.
Should I refrigerate it?
Check the current product label. Many modern probiotics are shelf-stable and do not require refrigeration, but cool, dry storage away from direct sunlight is always best.
Can I take Pre+Pro 15 after antibiotics?
Yes — this is one of the best-evidenced uses of probiotics. Start taking probiotics 2 hours after your antibiotic dose (not simultaneously), and continue for at least 4 weeks after the antibiotic course finishes.
Related: Do Probiotics Help with Weight Loss UK? | How to Manage Constipation on GLP-1 UK
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