If you’ve had bariatric surgery, lifelong bariatric vitamins and mineral supplementation isn’t optional — it’s essential.
Procedures like the gastric sleeve and gastric bypass change how your body absorbs nutrients, and the British Obesity & Metabolic Surgery Society (BOMSS) provides clear guidance on what every patient should take to stay healthy.
But with so many supplements on the market, how do you know which ones actually meet the standards?
In this post, we break down exactly what BOMSS recommends — and show how Bariboost Bariatric Multivitamin is formulated to match those requirements.
Why Supplements Are Lifelong After Bariatric Surgery
After surgery, your stomach capacity is reduced and nutrient absorption is altered. This increases the risk of deficiencies in:
- Iron
- Vitamin B12
- Vitamin D
- Calcium
- Folate
- Zinc & Copper
- Thiamine (B1)
- Selenium and fat‑soluble vitamins (A, E, K) in some cases
BOMSS states that all patients require annual blood monitoring and routine lifelong supplementation.
BOMSS Core Supplement Recommendations
Here’s a simple breakdown of what BOMSS advises for patients who have had a gastric sleeve (SG), gastric bypass (RYGB), or OAGB ≤150 cm.
A–Z Multivitamin & Mineral
BOMSS requires that a bariatric multivitamin must include at least:
- 400–800 µg folic acid
- 15 mg zinc
- 2 mg copper
Most supermarket multivitamins do not meet these standards.
Iron
Routine iron supplementation is required:
- 45–60 mg daily, and
- 100 mg daily for menstruating women.
Vitamin B12
- IM injection every 3 months, lifelong — even if blood levels appear normal. This prevents late‑onset neurological deficiency.
Calcium + Vitamin D
- Calcium with vitamin D twice daily
- Additional vitamin D may be needed to maintain healthy levels.
- Calcium citrate is preferred for patients with kidney stone history.
Thiamine (Vitamin B1)
- Needed urgently if vomiting, rapid weight loss, or poor intake.
- Deficiency can develop within 9–18 days and cause serious neurological issues.
The UK’s most complete bariatric multivitamin
How Bariboost Bariatric Multivitamin Meets BOMSS Standards
Bariboost is specifically designed for bariatric patients and clearly states its compliance with BOMSS recommendations.
Here’s how it matches up:
| BOMSS Requirement | BOMSS Recommended Amount | Bariboost Amount | Match? |
|---|---|---|---|
| Iron | 45–60 mg (100 mg for menstruating women) | 50 mg (iron bisglycinate – gentle and highly ab-solvable form) | ✔ Meets standard dose |
| Folic Acid | 400–800 µg | 800 µg | ✔ Fully meets |
| Copper | 2 mg | 2 mg | ✔ Exact match |
| Zinc | 15 mg (with zinc:copper ratio 8–15:1) | 20 mg (10:1 ratio) | ✔ Within recommended ratio |
| Thiamine (B1) | Included in bariatric doses | Included in bariatric doses | ✔ Included in bariatric doses |
| Vitamin D | Upto 4000 IU from combination of Adcal and extra vitamin D | 3000 IU in Bariboost plus 800IU in Adcal | ✔ Within recommended ratio |
| Vitamin B12 | High-dose oral or IM injection | 500 µg methylcobalamin | ✔ Within recommended ratio |
| Calcium | Must be taken separately from iron | Not included (by design) | ✔ Correct — avoids absorption conflict |
Why Bariboost Leaves Out Calcium
This is intentional — and correct.
BOMSS advises that iron and calcium must be taken at least 2 hours apart because they compete for absorption.
Bariboost avoids this conflict by not including calcium, allowing you to take your calcium supplement separately for optimal absorption.
Additional Benefits of Bariboost
- Vegan capsules
- Easy to swallow (frequently mentioned in reviews)
- Designed specifically for bariatric patients
- Convenient 2‑capsule‑per‑day routine
- Subscription option with free delivery
Final Thoughts
BOMSS makes it clear: lifelong supplementation is essential after bariatric surgery. But not all multivitamins are created equal — and most high‑street options fall short of the required zinc, copper, folic acid, and iron levels.
Bariboost Bariatric Multivitamin is one of the few products that directly aligns with BOMSS guidance, offering the correct doses, ratios, and bariatric‑specific formulation needed to support long‑term health.
If you’re looking for a supplement that truly meets the standards, Bariboost is a strong, evidence‑aligned choice.