Fewer ingredients, done properly
Most supplement brands add ingredients. We removed them. Every ingredient in Companion is in there because there is a clear reason it belongs - a symptom it addresses, a mechanism it supports, a deficiency it corrects.
GLP-1 medications suppress appetite significantly. That means less food, less fluid, and less of almost every nutrient. Companion is built around that specific reality, not around looking impressive on a label.
We use the most bioavailable form of each ingredient where it meaningfully affects absorption - and we use doses that are clinically relevant, not token amounts that satisfy a label claim.
The sodium-glucose co-transport mechanism
The 3g of glucose in Companion is not there for sweetness or energy. It activates the sodium-glucose co-transporter 1 (SGLT1) in the intestinal lining - the same mechanism behind WHO oral rehydration salts used in clinical dehydration treatment worldwide.
When glucose and sodium are present together in the right ratio, sodium absorption increases significantly compared to drinking water or plain electrolytes alone. This is why Companion is more effective at rehydrating than drinking more water, and why the glucose is an essential functional ingredient rather than filler.
The 3g dose is intentionally low - enough to activate the co-transport mechanism without contributing meaningfully to blood glucose or daily sugar intake.
Hydration Core
Sodium
Why GLP-1 users need it
Sodium is the primary extracellular electrolyte controlling fluid balance. GLP-1 medications dramatically reduce food intake - and dietary sodium comes almost entirely from food. Reduced eating means significantly reduced sodium intake, which leads to reduced fluid retention, lower blood volume, and the cascade of symptoms that follow: fatigue, dizziness, headaches, and the post-injection crash.
Why 1,000mg specifically
Most sport electrolyte products contain 200–500mg of sodium - appropriate for mild sweat replacement. For GLP-1 users experiencing appetite suppression across an entire week, the deficit is substantially larger. 1,000mg represents a clinically meaningful correction, not just a token amount. It is within safe daily supplemental limits and is the most important single ingredient in the formula.
Potassium
Why GLP-1 users need it
Potassium is the primary intracellular electrolyte and works in close balance with sodium. It is essential for nerve signal transmission, muscle contraction, and cardiac function. Foods richest in potassium - fruits, vegetables, dairy - are often the first things GLP-1 users stop eating as appetite falls. Low potassium contributes to muscle cramping and weakness.
Why citrate form
Potassium citrate is significantly better tolerated than potassium chloride, which can cause gastric irritation - a particular concern for GLP-1 users already managing nausea. The citrate form also has a mildly alkalinising effect which can be beneficial for kidney function. 300mg sits within the safe supplemental range without approaching the threshold that requires medical supervision.
Magnesium
Why GLP-1 users need it
Magnesium is involved in over 300 enzymatic processes - including energy production, protein synthesis, and the regulation of the nervous system. It is one of the most commonly deficient minerals in the general population, and that deficit deepens significantly when food intake drops. Low magnesium is closely linked to disrupted sleep, low mood, muscle cramps, and persistent fatigue - symptoms that GLP-1 users frequently report.
Why bisglycinate form
Magnesium bisglycinate is a chelated form - the magnesium is bound to glycine amino acids - which dramatically improves absorption compared to cheaper forms like magnesium oxide (which has approximately 4% bioavailability). Bisglycinate is also the gentlest form on the gut, avoiding the laxative effect of oxide or citrate at higher doses. This matters especially for GLP-1 users who are already managing gastrointestinal sensitivity.
Taurine
Why it is in the formula
Taurine is one of the most abundant amino acids in the body and plays a critical role in osmoregulation - the regulation of water and electrolyte movement within cells. Unlike sodium and potassium which primarily work in the fluid outside cells, taurine operates inside cells, helping to maintain intracellular fluid balance. It also supports cardiovascular function and acts as a calming neurotransmitter modulator.
The gap it fills
Standard electrolyte products contain no taurine. For GLP-1 users, who often experience symptoms even when drinking adequate water, the issue is not just extracellular dehydration - it is intracellular electrolyte imbalance. Taurine addresses the layer of hydration that sodium and potassium alone cannot reach. At 750mg, the dose is well within the range used in clinical studies on cardiovascular and metabolic health.
Cognitive Support
L-Theanine
Why GLP-1 users need it
Brain fog - feeling mentally slow, unfocused, and cognitively dulled - is one of the most consistently reported but least discussed GLP-1 side effects. It is partly caused by electrolyte depletion affecting neurological function, but also by reduced intake of protein and nutrients involved in neurotransmitter synthesis. L-Theanine directly supports the neurotransmitter systems involved in calm, focused attention - specifically increasing GABA and serotonin activity while modulating cortisol.
What the evidence says
L-Theanine is one of the best-studied cognitive supplements. At 100–200mg, it is consistently shown in double-blind trials to promote alpha brain wave activity - the mental state associated with relaxed alertness. Crucially, it does this without sedation or stimulation. There is no caffeine in Companion - L-Theanine provides cognitive support through a different, calmer mechanism. 150mg is at the upper end of the evidence-supported range.
Micronutrients
Vitamin B12
Why GLP-1 users need it
B12 is found almost exclusively in animal products - meat, fish, eggs, dairy. As GLP-1 medications reduce appetite and food intake, dietary B12 intake drops significantly. B12 deficiency develops slowly but presents as fatigue, weakness, cognitive symptoms, and mood changes - symptoms that overlap almost entirely with what GLP-1 users attribute to the medication itself. Correcting a developing B12 deficit can meaningfully improve how someone feels.
Why methylcobalamin form
Cyanocobalamin is the cheapest and most common form of B12 in supplements - but it must be converted by the body into the active form before use. Methylcobalamin is the active form, requiring no conversion and offering superior bioavailability, particularly for neurological function. At 500mcg, the dose is high by design: B12 is water-soluble, excess is excreted harmlessly, and a high dose ensures meaningful absorption even in people with reduced intrinsic factor production.
Vitamin B6
Why it is particularly relevant here
B6 is a cofactor in the synthesis of serotonin, dopamine, and GABA - three neurotransmitters central to mood, motivation, and wellbeing. It is also one of the few nutrients with a well-established clinical use as an anti-nausea compound. B6 is prescribed for pregnancy-related nausea (often as Pyridoxine HCl) and is directly relevant for GLP-1 users managing nausea as a side effect of their medication.
The dose
At 5mg, Companion delivers approximately 357% of the NRV for B6. This may look high, but B6 is water-soluble and the upper tolerable limit is 25mg/day in the UK. The elevated dose ensures meaningful delivery across all three of its primary functions - neurotransmitter synthesis, anti-nausea support, and energy metabolism - rather than a token amount that only partially addresses one of them.
Vitamin C
Why GLP-1 users need it
Vitamin C is found primarily in fruit and vegetables - foods that often disappear from the diet as appetite suppression takes hold. Even modest vitamin C insufficiency affects immune function, energy metabolism, and collagen production. GLP-1 users undergoing rapid changes in body composition have an elevated demand for collagen synthesis, making adequate vitamin C intake more important rather than less.
Its dual role in the formula
At 100mg - near the UK NRV - Companion delivers a meaningful daily dose. Vitamin C also plays a secondary functional role in the formula itself: as a natural antioxidant preservative, it helps maintain the stability of other ingredients in the sachet, particularly the B vitamins. This means fewer synthetic preservatives are needed while maintaining product quality through its shelf life.
Zinc
Why it matters for GLP-1 users
Zinc deficiency is common in people with reduced dietary intake and is strongly associated with hair thinning and hair loss - one of the most distressing side effects reported by people on GLP-1 medications, particularly after sustained calorie restriction. Zinc also plays a less well-known role in taste perception: low zinc levels dull the sense of taste, which can worsen appetite suppression and make eating less enjoyable.
Why bisglycinate form
Zinc oxide - the cheapest and most common form - has poor bioavailability and can cause gastric upset. Zinc bisglycinate is chelated to glycine, which significantly improves absorption and is gentler on the digestive system. At 7mg, Companion delivers around 70% of the NRV - enough to address developing deficiency and support the hair follicle and immune functions that matter most for this audience, without approaching the level where zinc can interfere with copper absorption.
Biotin
Why it is specifically relevant here
Hair thinning - often called telogen effluvium - is a well-documented consequence of rapid calorie restriction and weight loss. The hair follicle is one of the most metabolically active tissues in the body and is highly sensitive to nutritional status. Biotin is essential for keratin production, the protein that forms hair, skin, and nails. It is one of the most frequently recommended supplements by dermatologists for calorie-restriction-related hair loss.
Why it is in Companion
Most electrolyte and hydration products ignore this symptom entirely. We included biotin because hair thinning is one of the most emotionally significant side effects of GLP-1 treatment and one that is specifically addressable through nutrition. At 50mcg - 100% NRV - the dose is appropriate for daily use. Biotin is water-soluble and there is no upper tolerable limit established at this dose.
Companion vs. generic electrolyte drinks
Standard electrolyte products are formulated for athletes replacing sweat. They are not designed for appetite suppression, nutrient depletion, or the cognitive symptoms of GLP-1 use.
| Feature | Companion | Sport electrolytes | Multivitamins |
|---|---|---|---|
| High-dose sodium (1,000mg+) | ✓ | Sometimes | ✗ |
| Sodium-glucose co-transport | ✓ | Rarely | ✗ |
| Magnesium bisglycinate (absorbed form) | ✓ | ✗ | Sometimes |
| Taurine for intracellular hydration | ✓ | ✗ | ✗ |
| L-Theanine for brain fog | ✓ | ✗ | ✗ |
| Active B12 (methylcobalamin) | ✓ | ✗ | Rarely |
| B6 for nausea + mood | ✓ | ✗ | Sometimes |
| Biotin for hair thinning | ✓ | ✗ | Sometimes |
| No caffeine, no adaptogens | ✓ | Varies | ✓ |
| Formulated specifically for GLP-1 users | ✓ | ✗ | ✗ |
Ready to feel the difference?
Pre-order Companion at early access pricing. If we can't fulfil your order for any reason, you get a full refund automatically.
30 daily sachets · Mixed berry · Free UK shipping · Full refund if unfulfilled