Excellent

4.9/5.0

Lysine supplement

  • Feel like yourself again after surgery
  • Hair stays thick while you're shedding
  • Energy returns without iron stomach upset
  • Bones stay dense after bariatric surgery
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Don't Just Trust Us.

Real experiences from real customers who love our products and service.

Excellent 4.8/5 based on 2,500+ customer reviews

Four months in one bottle

The price per day is insane when you do the math. My nutritionist actually approved this one

S
Sarah M. Verified customer

"No stomach issues at all"

Every other iron supplement destroyed my stomach. These don't. That alone is worth it.

M
Mike K. Verified customer

Finally stopped losing hair

Three weeks in and the shower drain is almost clear. I've tried two other bariatric vitamins and nothing worked like this

J
Jessica M. Verified customer

My energy is back

I forgot what it felt like to not be exhausted by noon. Four months post-sleeve and I finally feel human again

L
Lily M. Verified customer

Doctor recommended this form of iron

My surgeon told me I needed iron bisglycinate specifically. This is the only affordable option I found that actually has it

L
Liam B. Verified customer

Wish I found this sooner

Two years post-bypass with terrible bloodwork. Started Krebba two months ago — my iron levels are the best they've been since surgery

L
Liam B. Verified customer

Your Recovery Week by Week

Nutrients rebuild slowly. Here's what bariatric customers report as levels stabilize.

Week 1

Stomach tolerates it — no cramping

Iron bisglycinate is the gentlest form available. Most bariatric patients who struggled with other supplements feel nothing but relief here. Your gut has been through enough.

Weeks 2–4

That drained feeling starts to lift

Methylated B12 and active iron begin closing the deficiency gap. You're not wide awake — but you stop collapsing at 2pm and wondering why.

Month 2

The shower drain tells you it's working

Hair shedding is the last symptom to show up after surgery and the first one that confirms your nutrients are finally being absorbed. Biotin and calcium are doing their job.

Month 4

Bloodwork looks different

4 bottle covers four full months. By the time you finish it, iron levels, B12, and bone density markers have had real time to shift. That's when customers come back for more.

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What Actually Changes When You Take It Here

Surgery rewired your absorption. Here's what fixes first.

Hair stops falling out in handfuls +

Post-surgery hair loss isn't about stress or genetics — it's your follicles starving for biotin, iron, and B12 your gut can no longer pull from food. Once those levels rebuild, the shedding slows. Most patients notice it in the shower drain around week 6.

Energy stops crashing by midday +

That 2pm wall isn't laziness. It's iron deficiency cutting oxygen delivery to your muscles and brain. Methylated B12 and iron bisglycinate in their active forms bypass the digestive bottleneck surgery created — and your cells finally get the fuel they've been rationed off from.

Bones stay dense while the weight drops +

Rapid weight loss after bariatric surgery pulls calcium from your bones if you're not replacing it fast enough. The longer you go without a bariatric-specific dose, the more structural damage compounds quietly. Calcium and vitamin D here are dosed at the levels your changed gut can actually absorb.

Stomach handles it — no cramping, no nausea +

Standard iron tears up post-op stomachs. Iron bisglycinate is the chelated form — bound to amino acids so it absorbs in your upper intestine without the oxidative damage that causes cramping. Patients who gave up on iron supplements entirely are the ones who feel the difference fastest.

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The Science

Standard vitamins assume your gut works like everyone else's. Yours doesn't anymore.

Iron Bisglycinate — 45mg +

Most iron supplements use ferrous sulfate — cheap, harsh, and poorly absorbed post-op. Iron bisglycinate is bound to amino acids, so it absorbs in your upper intestine without needing stomach acid you no longer produce enough of. Zero cramping. Full dose delivered.

Methylated B12 & Folate +

Your liver converts standard B12 into a usable form — a step bariatric surgery compromises. Methylated B12 skips that conversion entirely. It enters your bloodstream ready to work, which is why energy and neurological symptoms respond faster here than with any regular multivitamin.

Biotin + Calcium Complex +

Hair follicles and bone density share the same problem after surgery — they're last in line for whatever nutrients make it through. Biotin and calcium at bariatric-level doses give your body enough surplus to rebuild both, instead of just keeping your organs running.

23 Active Nutrients — Zero Fillers +

Every ingredient is in its active, bioavailable state. No synthetic binders, no additives that slow absorption. For a post-op gut already working at reduced capacity, fillers aren't just useless — they compete with the nutrients your body is trying to pull in.

Not All Vitamins Work After Surgery

Your absorption changed. Most vitamins didn't get the memo.

Krebba Regular Multi Gummies Iron Only
Absorbed post-surgery ✓ ✗ ✗ ✗
45mg iron bisglycinate ✓ ✗ ✗ ~
Methylated B12 ✓ ✗ ✗ ✗
No stomach upset ✓ ~ ~ ✗
Stops hair shedding ✓ ✗ ✗ ✗
Zero fillers ✓ ✗ ✗ ~
4-month supply ✓ ✗ ✗ ✗
Built for bariatric patients ✓ ✗ ✗ ✗

✓ Yes   ~ Partially   ✗ No

RISK-FREE Guarantee

We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 60 days for a full refund.

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RISK-FREE Guarantee

We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 60 days for a full refund.

CLAIM NOW
100% Satisfaction
Fast Shipping
Easy Returns

Frequently Asked Questions

Everything bariatric patients ask before their first order.

Can I take this if I'm still in early recovery post-surgery? +

Yes. Iron bisglycinate is the gentlest form of iron available — it doesn't require high stomach acid to absorb and won't inflame a healing gut. Two capsules with food is all it takes. Most patients start within the first few weeks post-op.

Why can't I just take a regular multivitamin from the grocery store? +

Standard multivitamins are formulated for people with intact digestive systems. After bariatric surgery, your stomach acid output drops and your small intestine bypasses the section where most nutrients absorb. A regular vitamin passes through largely unused. That's not a marketing claim — it's why bariatric patients develop deficiencies even when they think they're covered.

I've tried iron before and it destroyed my stomach. Why would this be different? +

Most iron supplements use ferrous sulfate — it's cheap and oxidizes in your gut, which causes the cramping and nausea. Iron bisglycinate is chelated, meaning it's bound to amino acids that escort it directly into absorption without the oxidative reaction. Patients who gave up on iron entirely are usually the ones most surprised by this one.

How long until I see results? +

Stomach tolerance is immediate — most patients feel no discomfort from day one. Energy starts shifting around weeks 2–4 as iron and B12 levels climb. Hair shedding slows closer to month 2, once follicle nutrition has had time to rebuild. Bloodwork typically looks different by the end of the bottle

Is one bottle really a 4-month supply? +

240 capsules. Two per day. That's exactly 120 days. Most bariatric multivitamins sell 30-day supplies at the same price point — you're getting four times the coverage without stacking orders every month.

What if it doesn't work for me? +

If you take it consistently for 30 days and don't notice a difference, reach out. We stand behind this formula because the deficiencies it targets are documented and measurable — not subjective. Your absorption changed after surgery. This was built around that fact.