Everything inside
The full page. What is in each pack, how much, why it is there and where it comes from, what founders get, and every question we have been asked so far.
Planned doses printed on the packManufacturer being selectedHalal in preparationRefundable deposit
founding spots in the first round
off the first box for founding members
refundable deposit reserves your spot. Back any time before shipping.
Founding members
The first 300 members decide with us what the product becomes. Taste, sweetness, the size of the pack, and what we make next.
Founders reserve their spot with a refundable deposit of 25 USD. It funds the first batch, counts toward the first box, and comes back any time before shipping. We send the details by email. Founders talk with the founder directly in a private WhatsApp group.
Become a founderThe pilot batch goes to founders before anyone else. Your feedback sets the final flavor.
Morning and night flavors, how sweet, how big the pack. Founders vote, we build.
The lab report, the supplier list, and the first look at product two, a vegan version, before it exists.
25 percent off the first box. Your deposit counts toward it and comes back if you change your mind before shipping.
What is inside
Morning on the left. Night on the right.
Morning pack, about 28 g
On waking, or with the first thing you eat.
Keeps muscle while you eat less. 1.5 g added leucine is the switch that starts muscle building. Thin and fruity, not creamy.
About 400 mg sodium with potassium and magnesium. Hydration without an aggressive stack.
A real thiamine dose for the weeks you cannot keep food down, and the vitamins a full plate would have given you, at daily-value levels.
The old remedy for a queasy start.
Stir into 200 ml cold water. Drink on waking or with the first thing you eat.
Planned formula. Final amounts are set with the manufacturer and printed on the pack.
Night pack, about 11 g
Warm water before bed. Start with half, go to one or two as your gut allows.
A low-viscosity fiber chosen because it is gentle, with green kiwifruit extract, the fruit with the constipation trials behind it.
The citrate form, the one usually picked for the gut.
For muscle. Made synthetically, not from animals. We use it because the evidence is strong.
Fast weight loss costs bone. The building blocks go back in at night, with D3 in the morning. Ginger and chamomile as the flavor, warm, not sweet.
Stir into warm water before bed. Start with half a pack, go to a full pack or two as your gut allows.
Planned formula. Final amounts are set with the manufacturer and printed on the pack. Keep the night pack one to two hours away from oral medicines.
Transparency
Every ingredient is listed like this: what it is, which form, how much, why it is in, and where it comes from. Supplier and country of origin for each one are published with the first batch, together with the lab report. Until then the cards show the planned formula.
Clear whey isolate, from milk
20 g protein per pack, plannedKeeps muscle while you eat less. The 2025 joint advisory asks for 1.2 to 1.6 g protein per kilo a day; a small plate rarely gets there.
Sodium and chloride from seawater
Amount on the packPeople on injections drink less and lose salt with it. Sodium is the electrolyte that stops the day-three headache.
Coconut water powder, for potassium
Amount on the packPotassium for hydration, from the fruit rather than a salt. It also gives the morning pack its light, fruity base.
Magnesium from seawater
Amount on the packThe third electrolyte. Part of the hydration set, at a gentle daytime dose.
Acerola cherry extract
Daily-value level, plannedVitamin C from a fruit, not from a factory, because the dose allows it here.
Thiamine mononitrate or hydrochloride, set with the manufacturer
30 mg per pack, plannedThe one vitamin the case reports are about. People who vomit for weeks on an injection have ended up in hospital with thiamine deficiency. Prevention guidance uses far more than a multivitamin carries, so we do too.
Forms set with the manufacturer, printed on the pack
Daily-value levels, plannedA smaller plate carries fewer vitamins. These are the ones a full plate would have given you. B6 stays at a daily-value level; the nausea work is ginger's.
Ginger root
500 mg per pack, plannedNausea is the most common side effect in the first weeks on an injection, and ginger is the best-studied food against nausea in general. Ask your doctor first if you take blood thinners.
Partially hydrolysed guar gum (PHGG)
5 g per pack, plannedThe gentle fiber. Thick fibers slow the stomach, and so does the injection; this one keeps the gut moving without doing that.
Magnesium bound to citric acid
150 mg magnesium per pack, plannedThe citrate form, the one usually picked when the gut is slow. Start with half a pack; too much magnesium loosens the stool.
Creatine monohydrate
3 g per pack, plannedLean mass goes with the fat on these injections, and creatine has decades of evidence for keeping muscle. Made synthetically, not from animals. It holds a little water in the first weeks, and we say so.
Calcium citrate; K2 form and amount set with the manufacturer
250 mg calcium per pack, plannedA 2024 trial found semaglutide lowered hip and spine bone density in a year. Calcium, K2 and the D3 in the morning pack are the building blocks bone needs while the weight comes off.
Green kiwifruit extract
Amount set with the manufacturerTwo green kiwifruit a day improved constipation in a 184-person trial, and a kiwifruit extract did the same in a 186-person trial. It sits next to the PHGG so the night pack works on the gut from two sides.
Chamomile flower and ginger root, for flavor
FlavorWarm, not sweet. No sweetener does the work of a flavor here.
Certificate of analysis from an independent laboratory
Published online per batchWhat is on the pack is what is in the pack. The report for every batch goes online, and the batch number on your box finds it.
Planned formula. Final amounts are set with the manufacturer and printed on the pack. This product is a food and does not replace meals, medication or your doctor's advice.
Why each ingredient is in
What the studies found, in whom, and what they have not tested yet. No ingredient here has been trialled in people on the injection; every line says where the evidence comes from.
Found: in 380 older adults with low muscle, a whey drink with added leucine and vitamin D improved muscle measures over 13 weeks (the PROVIDE trial, 2015). In older adults losing weight on purpose, the same trio preserved muscle mass in a placebo-controlled trial (American Journal of Clinical Nutrition, 2015).
Why here: lean mass is 20 to 30 percent of the weight lost on these injections. Not tested: in people on the injection; the first such trial, LEAN-PREP, has no results yet.
PROVIDE, JAMDA 2015 · Verreijen, AJCN 2015 · Body composition review, 2025
Found: decades of trials in healthy adults show creatine monohydrate helps keep and build muscle with training. Honest note: it holds water in the first weeks, one to two kilos with a loading phase, less at 3 g a day without one.
Not tested: in people on the injection.
Found: 15 cases of Wernicke encephalopathy, a thiamine-deficiency brain injury, in people on semaglutide or tirzepatide (Clinical Nutrition, 2025), and six published semaglutide cases in a 2026 systematic review (Obesity). Guidance for people at risk uses 50 to 100 mg a day of oral thiamine.
Why here: weeks of nausea and vomiting plus very little food is exactly the risk pattern. 30 mg sits inside every country's limit. Not tested: no prevention trial in people on the injection.
Clinical Nutrition 2025 · Obesity 2026 review · Prevention guidance
Found: in a 52-week randomised trial of 64 adults, semaglutide lowered hip bone density by 2.6 percent and spine by 2.1 percent against placebo, with more bone breakdown and no extra bone building (eClinicalMedicine, 2024). A 2025 cohort of 66,000 tirzepatide users found 44 percent more new osteoporosis or fractures than on other GLP-1 drugs. K2 improved spine density in a 2025 meta-analysis of 16 trials in postmenopausal women.
Not tested: no trial has given calcium, D3 or K2 to people on the injection. The support is bone guidance after bariatric surgery and the K2 trials above.
Semaglutide bone trial, 2024 · Tirzepatide cohort, 2025 · K2 meta-analysis, 2025
Found: partially hydrolysed guar gum is a low-viscosity fiber used in constipation studies, and it does not thicken in the stomach the way psyllium or glucomannan do. Why here: the injection already slows the stomach; thick fibers slow it more, and nobody has tested that combination. Not tested: in people on the injection.
Found: two green kiwifruit a day improved constipation and abdominal comfort in a 184-person international crossover trial (American Journal of Gastroenterology, 2023). A kiwifruit extract at 575 mg twice a day improved complete bowel movements and stool consistency in 186 people with constipation-type IBS (2025). A low 1 g freeze-dried powder did nothing, so the form and dose matter and the maker sets them with us.
Not tested: in people on the injection.
Found: magnesium citrate draws water into the gut, which is why it is the form usually picked when the gut is slow; loose stools are the limit, which is why the pack starts at half. Not tested: at exactly 150 mg in a dedicated trial, and not in people on the injection.
Found: an overview of 15 meta-analyses found ginger reduces nausea after chemotherapy, after surgery and in pregnancy; trials used 500 to 1,500 mg a day. Honest note: it reduces nausea more than vomiting, and it can interact with blood thinners such as warfarin. Not tested: in people on the injection.
Found: people on the injection eat 500 to 650 fewer calories a day and drink less, and nausea, vomiting and diarrhea cost fluid and salt. Honest note: no controlled trial has tested electrolytes alone against headache or tiredness in any group, so we do not claim that. We put back what a normal day of food and drink carries, at gentle amounts within each country's limits.
Found: the 2025 joint advisory from four US medical societies lists preventing micronutrient deficiency as a priority for people on the injection, based on how little they eat. Honest note: B6 stays at a daily-value level. Its nausea evidence exists only in pregnancy at far higher doses, and Europe cut its safety limit to 12 mg in 2023, so we do not use it for nausea.
Replen is food. None of this treats, cures or prevents a disease, and none of it has been trialled in people on the injection. The studies are linked so you can read them yourself.
Small enough to finish
A normal shake is 300 ml of creamy liquid. Ours is 200 ml and clear as juice.
Half a night pack on a sensitive day, two on a slow one.
Start with the first injection week, when the side effects begin, not after.
Honest by design
How the founding round works
Reserve with the form in 20 seconds. We email you the next step and the details for the 25 USD deposit.
We message you when the first batch is ready, with your founding price. Founders with a deposit are served first.
Change your mind any time before shipping and the deposit comes back.
Questions
A refundable deposit of 25 USD reserves a founding spot. It funds the first batch, counts toward your first box and comes back any time before shipping. You can also reserve without a deposit; founders with a deposit are served first.
The first taste of the pilot batch, a vote on the flavors and the pack size, the batch test results and the supplier list as soon as they exist, a private WhatsApp group with the founder, and 25 percent off the first box.
By email, from hello@replen.co. If you tick WhatsApp in the form, launch news comes there too; WhatsApp messages get read faster.
The first batch follows the founding round. Founding members are served first, in Bali by courier, then across Southeast Asia.
An Indonesian food manufacturer that is being selected now. Registration and halal certification are in preparation. The test results for every batch will be published.
Because the case reports are about it. People who vomit for weeks on an injection have been admitted to hospital with thiamine deficiency. The guidance for people at risk uses far more than a multivitamin carries, so the morning pack carries 30 mg, within every country's limit.
Because fast weight loss costs bone as well as fat; a 2024 trial measured it on semaglutide. Calcium and K2 at night, D3 in the morning, are the building blocks. No trial has yet tested them in people on the injection, and we say so.
We publish the supplier and country of origin for every ingredient with the first batch, together with the lab report. Until then the page shows the planned formula.
It is food: the protein and fiber a small appetite skips, plus the minerals and vitamins that come with a full plate. Keep the night pack one to two hours away from oral medicines and ask your doctor if you take other medication.
No. It fills the gaps a small appetite leaves. Eat real food first, as much as you can.
Because muscle is what you lose fastest on these injections and creatine has decades of evidence for keeping it. One honest note: it holds a little water, so the scale can show a kilo more in the first weeks. That is water, not fat.
Send a founding request. No payment is taken here. We email the details for an optional USD 25 refundable deposit.
Your founding request has been received. You can skip these questions. If you submit answers, they are emailed to Replen with your email address.