Höveler Pur.Muskel: 9 Things Doing the Amino-Acid Work Instead of Live Yeast

Quick answer: Höveler Pur.Muskel contains no live yeast — it is a supplementary muesli whose protein package is built on essential amino acids instead: lysine 0.85%, threonine 0.6%, methionine+cysteine 0.5%, and 160 g/kg digestible crude protein. It supports muscle development, is FEI-compliant, and costs $52.99 for a 44 lb bag. Last checked: September 2026.

You went looking for yeast on the label and didn't find it. Fair enough — plenty of feeds lean on live yeast for gut support. Pur.Muskel takes a different route: it concentrates its formulation on a stated amino-acid package for muscle building, and leaves gut support to the rest of the ration. Here are 9 things in the bucket low starch performance feed doing that work instead.

1. Lysine at 0.85% — the headliner of the amino-acid package

Lysine is the first-limiting amino acid for muscle synthesis, which means muscle development slows first on lysine, not total protein. Pur.Muskel states it plainly: lysine at 0.85%. That stated number is what lets a nutritionist budget a ration around it rather than hedge.

Who this is for: owners targeting topline and muscle development who want a declared lysine level, not a vague protein claim.

2. Threonine at 0.6% — the second named essential

Threonine is the second essential amino acid Pur.Muskel states, at 0.6%. Together with lysine, it rounds out the set of amino acids muscle tissue draws on hardest during training. Stated levels mean you can track intake as work steps up.

The benefit: the two most-limiting amino acids for muscle are on the label with figures attached.

3. Methionine 0.25% and methionine+cysteine 0.5% — the sulfur aminos

Sulfur-containing amino acids earn their own line here: methionine at 0.25% and methionine+cysteine at 0.5%. Methionine also matters for coat and hoof quality, so its stated level earns its place even in a muscle-focused feed.

Who this is for: owners who want the full essential-amino-acid picture — lysine, threonine, and the sulfur aminos — in one supplementary feed.

4. 160 g/kg digestible crude protein — absorption, not just the label

Raw protein sits at 20%, but the number to plan around is digestible crude protein: 160 g/kg. That is the protein your horse actually absorbs and can put toward muscle. It is what separates a formulated muscle feed from a bag that simply reads high.

The benefit: protein support judged by absorption, with digestible energy at 14.1 MJ/kg to carry it.

5. The protein sources behind the aminos: four plant ingredients

Those amino acids come from genuine ingredients: soy flakes, sweet lupine flakes, muscle building feed for horses pea flakes, and sunflower extraction meal. Four plant protein sources lend the mix its 20% raw protein without added vitamins or minerals muddying a custom plan.

Who this is for: owners who study ingredient lists, not just guaranteed analysis panels.

6. No yeast — and no added vitamins or minerals either

The absence of yeast sits alongside another deliberate choice: Pur.Muskel adds no vitamins or minerals at all. That is what makes it a tidy supplementary feed for a custom ration — you add just the muscle piece, and your balancer or yeast supplement keeps doing its own job.

The benefit: no overlap, no stacking. One feed, one job, fitted into a full nutrition plan.

7. Low starch, 5.8% — amino acids delivered without the fizz

Amino acids only work if the ration stays manageable, and Pur.Muskel holds starch at 5.8% and sugar at 4.1%. Energy is drawn from 15.0% raw fat and 14.1 MJ/kg digestible energy instead. That combination suits metabolically sensitive breeds particularly.

Who this is for: owners of metabolically sensitive breeds who still want a serious protein package.

8. Gentle on the stomach while the protein does its work

High-protein rations raise gut-comfort questions, and Pur.Muskel is designed to be gentle on the stomach. There is no yeast in the bag, but the mix itself — meadow lyegrass base, low starch at 5.8% — is built to sit comfortably alongside your forage program.

The benefit: a protein-dense supplementary feed designed for daily use in work.

9. Competition safe, so the amino-acid support never has to stop

Pur.Muskel is competition safe and FEI-compliant, backed by Höveler's feed-making history since 1905 — over 120 years of experience, made in Germany. The amino-acid support carries on through show season without a withdrawal window to manage. It goes at $52.99 for a 44 lb bag.

Who this is for: competitive owners who need one ration they can train on and show on, with a 30-Day Money-Back Guarantee behind the first bag.

How to feed it

Pur.Muskel is a supplementary feed — added to a complete ration, never fed alone. Rates are per 220 lb (100 kg) body weight per day:

Work levelDaily rate per 220 lb (100 kg) body weight Light work0.07–0.11 lb (30–50 g) Medium work0.11–0.18 lb (50–80 g) Heavy work0.18–0.22 lb (80–100 g)

A 1,000 lb horse in medium work, for example, receives 50–80 g daily. Weigh it — these ranges are measured in grams, not scoops.

Key specs at a glance: lysine 0.85%, threonine 0.6%, methionine+cysteine 0.5%, digestible crude protein 160 g/kg, raw protein 20%, starch 5.8%, 44 lb bag, $52.99. Every number is declared on the Höveler Pur.Muskel 44 lb bag page.

To size the ration to your horse's workload, use the feeding calculator.

What an owner said

"Noticeable difference in stamina" — Jessica, March 14, 2019 (Quality 4, Value 5, Price 4 out of 5). The product rates 4.55 from 2 reviews overall.

Frequently asked questions

Does Höveler Pur.Muskel contain yeast?

No. There is no live yeast or yeast culture in the ingredient list. The formulation concentrates on essential amino acids: lysine 0.85%, threonine 0.6%, and methionine+cysteine 0.5%.

Can I add a yeast supplement alongside it?

Yes — and that is the intention. Pur.Muskel adds no vitamins or minerals, so a separate gut supplement integrates without overlap. It is a supplementary feed inside a full nutrition plan.

What are the amino acids in it and why do they matter?

Lysine (0.85%), threonine (0.6%), methionine (0.25%), and methionine+cysteine (0.5%). These essentials are the bottlenecks for muscle development, which is the reason a muscle-building feed states them.

How much protein does the horse actually absorb?

The digestible crude protein figure is 160 g/kg, on a base of 20% raw protein. Digestibility is the number nutritionists plan around.

Is it safe for a hot or metabolically sensitive horse?

Starch is kept to 5.8% and sugar at 4.1%, and the feed is formulated especially for metabolically sensitive breeds.