Nutrition
Which supplements does Belle recommend, and is creatine safe?
Updated Sep 26, 2026From the Belle care team
These are the four supplements Belle's medical team recommends for anyone in a calorie deficit:
| Supplement | Daily dose | Why | Good to know |
|---|---|---|---|
| Creatine monohydrate | 5 g | Strength and muscle; helps keep lean mass during weight loss | The scale may rise 2–4 lbs at first — water in muscle, not fat |
| Vitamin D3 | 2,000 IU | Bone, muscle and immune health | Your provider may adjust this if they have your labs |
| Vitamin K2 | About 100 mcg | Pairs with D3; helps move calcium into bone | On warfarin? Check with your provider first — K2 can affect how warfarin works |
| Electrolytes | Sugar-free, sodium-forward | Energy, hydration, fewer headaches and cramps | Matter even more on a GLP-1, when you eat and drink less. When to use them: How much water should I drink, and do I need electrolytes? |
Is creatine safe?
Creatine monohydrate is one of the most-studied supplements there is. Here are the facts behind the most common worries.
- "Creatine causes hair loss." It doesn't. The idea comes from one small 2009 study that saw a hormone change. It never measured hair, and later research — including a 2025 trial that did measure hair — hasn't shown hair loss.
- "Creatine hurts your kidneys." For people with overall healthy kidneys, creatine at normal doses is safe for the kidneys.
- "High creatinine on my labs means kidney damage." Creatine breaks down into creatinine, so a somewhat higher blood creatinine is normal and expected while you take it. It doesn't mean kidney damage. Let your provider know you take creatine before bloodwork. If you or your provider are concerned, they can check a cystatin C level, a kidney test that creatine doesn't affect.
- "Creatine isn't for PCOS." Creatine is a great fit for PCOS (also called PMOS). It helps build muscle, and more muscle improves insulin sensitivity — a key driver of the condition.
- Water weight: the scale may go up 2–4 lbs when you start. That's water pulled into your muscles, not fat.
💬 Check with your provider first if you take warfarin (before K2), have known kidney disease (before creatine), or are pregnant or trying to conceive. Message your care team and we'll get it in front of them.
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