Most diets are built for a short burst and not for the year afterwards. Understanding why they unravel is more useful than another meal plan, and it changes what you look for in a product.
Why calorie restriction on its own tends to fail
"Calories in, calories out" is true and incomplete. Cut intake hard and the body adjusts: resting expenditure falls, which makes further loss slower and regain easier once you eat normally again.
Appetite regulation moves too. Severe restriction pushes hunger and satiety signalling in the direction that makes eating more feel urgent rather than optional. That is biology, not weakness, and it is why willpower is the wrong thing to blame.
Why muscle matters
Most weight loss takes some muscle with the fat. Muscle is metabolically active tissue, so losing it lowers resting expenditure and makes maintenance harder. Anything sustainable has to take that seriously — which mostly means protein and resistance training rather than a supplement.
Where TR90 sat, and what is left of it
Nu Skin described TR90 as "a breakthrough weight management and body shaping system, based on highly innovative gene expression science, that unifies your mind and body — for a leaner, younger looking you."
That is their sentence and it is worth reading precisely. It is a gene-expression claim about a system. It is not a claim that any particular product preserves muscle while you lose fat — this page used to say that, and Nu Skin does not print it on their US page, so it has been removed.
An honest update: as of 22 September 2026, Nu Skin's US catalogue still lists the TR90 GreenShake and the TR90 JumpStart 2pk, but TR90 Control and TR90 Fit no longer appear. We stock the GreenShake and not the JumpStart. Their description of the shake: "A delicious vanilla flavored lactose-free, gluten-free, soy-free shake, using vegetarian proteins." See the weight management collection for what is actually in stock, or our full TR90 update.
Still stocked and sensible alongside it: LifePak Nano for daily micronutrient coverage, Nu Biome for digestion while your eating pattern changes, and TRMe GO Protein+ for training.
What actually holds up
- Protein at every meal, for satiety and for muscle
- Resistance training two or three times a week
- Sleep, which moves appetite signalling more than most people expect
- Something that reliably reduces your stress
- Water, consistently
None of that is a product claim. It is the part that works whether or not you buy anything from us.
Frequently Asked Questions
Is TR90 still available?
Partly. The GreenShake and the JumpStart 2pk are still listed by Nu Skin; TR90 Control and TR90 Fit are not. We stock the GreenShake.
How long does it take?
We are not going to give you a number of days. This page used to promise visible body composition change inside a set number of days, and that promise was ours rather than Nu Skin's.
Do I need a specific diet alongside it?
The shake is a meal replacement, so it fits into whatever you are eating rather than replacing a plan. Protein, vegetables and consistency do the heavy lifting.
Where to Buy
Every product from NuBodyRx.com is 100% authentic and ships from the US. There is no membership, no distributor account and no monthly order required.
Learn more about buying Nu Skin without a distributor.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.